Experimental CORN HYBRIDS TESTED IN 1955 By R. W. Jugenheimer and A. F. Troyer Bulletin 597 - UNIVERSITY OF ILLINOIS AGRICULTURAL EXPERIMENT STATION Location of regular experimental-hybrid test fields CONTENTS Page MATERIAL TESTED 3 MEASURING PERFORMANCE 7 RESULTS OF THE TESTS 7 NORTHERN ILLINOIS Double crosses (Table 2) 10 Single and double crosses (Table 3) 13 NORTH-CENTRAL ILLINOIS Double crosses (Table 4) 14 Three-way and double crosses (Table 5) 17 CENTRAL ILLINOIS Double crosses (Table 6) 18 Single and double crosses (Table 7) 21 Three-way and double crosses (Table 8) 22 Blight resistant three-way crosses (Table 9) 23 Single and double crosses (Table 10) 24 SOUTH-CENTRAL ILLINOIS Double crosses (Table 11) 25 Three-way and double crosses (Table 12) 28 PERFORMANCE OF LINES IN SINGLE CROSSES (Table 13) 29 DOUBLE-CROSS HYBRID NUMBERS, PEDIGREES, AND INDEX (Table 14) 30 Acknowledgment is due W. T. Schwenk and Sons, Edwards, Illinois, for providing land for one of the tests, Dr. W. C. Jacob, Professor of Agron- omy, for valuable computational and statistical assistance, and to K. E. Williams and H. M. Hayes for aid in field and laboratory work. Urbana, Illinois January, 1956 Publications in the Bulletin series report the results of investigations made or sponsored by the Experiment Station EXPERIMENTAL CORN HYBRIDS I TESTED IN 1955 By R. W. JUGENHEIMER and A. F. TROYER' THIS REPORT summarizes the results of advanced tests of experimental corn hybrids conducted in 1955 by this Station. Data from many preliminary tests involving specialized phases of the corn-research program were not included in this bulletin. Trials were made at four locations: in DeKalb county in northern Illinois, in Peoria county in north-central Illinois, in Champaign county in central Illinois, and in Fayette county in south-central Illinois. These four locations are representative of the soil, rainfall, and length of growing season in their respec- tive areas. Hybrids were compared for yield, maturity, resistance to lodging, and other agronomic characters. Only hybrids of similar maturity were tested on the same field. A familiar hybrid whose maturity was considered the standard for the group is named in each table heading. Since most of the hybrids whose performance is recorded here are not yet in commercial use, the information about them is of most value to producers of hybrid seed. The 1955 performance of hybrids available in commercial quantities to farmers is reported in Bulletin 598 of this Station. MATERIAL TESTED One hundred and forty-five different double-cross hybrids were grown at the four locations. Most of the Illinois hybrids were developed by the senior author. The seed was produced by controlled hand-pollination. Three sets of single crosses and four sets of three-way crosses differing in maturity were tested in 1955. The three-way crosses (Tables 5, 8, 9, and 12) are a part of the "uniform" tests con- ducted cooperatively by corn-belt states, including Illinois, and 1 R. W. JUGENHEIMER, Professor of Plant Genetics and Corn Research Co- ordinator, and A. F. TROYER, Assistant in Agronomy. 4 BULLETIN No. 597 [January, the U. S. Department of Agriculture. Seed of the unreleased inbred lines involved in these crosses was contributed by the state or by the federal corn breeder who developed them. Single crosses whose performance is reported in Tables 3, 7, and 10 were developed by the Illinois Station and tested only in Illinois. The following individuals are responsible at the present time for collecting seed of inbred lines, making the crosses, and dis- tributing crossed seed of the entries in the uniform tests: J. H. Lonnquist (Nebraska), R. W. Jugenheimer (Illinois), and G. F. Sprague (Iowa) Tables 5 and 8; M. T. Jenkins (U. S. De- partment of Agriculture) --Table 9; and L. A. Tatum (Kansas), W. R. Findley (U. S. Department of Agriculture), and M. S. Zuber (Missouri) Table 12. The University of Illinois does not produce hybrid seed corn in commercial quantities. If a hybrid gives satisfactory perform- ance, the parental lines are released for use by seedsmen. Hybrids that include new inbred lines are produced under the "delayed release" program adopted by most of the states in the corn belt. Multiplication of a new line is handled by the Station, and the production of single crosses in quantity is handled by the Illinois Seed Producers Association, Champaign, Illinois. After a satis- factory probationary period of two to five years, a new line is released to the public. Table 14 (see pages 30 to 32) lists the double-cross hybrids whose performance is shown in this report and the tables in which each appears. It also contains the pedigrees of the hybrids tested. In the pedigrees, the order of the single crosses and of the lines in the single crosses has no significance ; it does not indicate which should be used as seed or pollen parent. Illinois yellow hybrids are numbered consecutively below 2000 and above 6000. White hybrids are numbered in the 2000 series; these are usually followed by the letter W. Hybrids that have performed well after wide testing in several corn-belt states have been designated AES (Agricultural Experiment Station) hybrids. Hybrids in the 600 series are similar to Illinois 1277 in maturity; those in the 700 series correspond in maturity to Illi- nois 21; those in the 800 series correspond to U. S. 13; and those in the 900 series to Illinois 448. The letter A or B following an Illinois hybrid number indi- cates that the combination of inbred lines making up the hybrid 1956} EXPERIMENTAL CORN HYBRIDS: 1955 TESTS 5 has been rearranged or permuted. For example, if the original pedigree of an Illinois hybrid was (1X2) (3X4), the letter A following the number means that the hybrid was put together (1X3) (2X4), the letter B, (1 X 4) (2 X 3). A difference in reciprocals is not recognized in this method. When a short dash (-) followed by a number occurs as part of an Illinois hybrid number, it means that a tested related line has been substituted for one of the inbred lines included in the original hybrid. Performance of three-way and single-cross hybrids is of in- terest to corn breeders, producers of hybrid seed corn, and to farmers. Characteristics of single crosses such as yield, stand- ability, seed size, shape, and quality definitely affect the practi- cal production of hybrid seed corn. Some farmers are interested in growing single-cross and three-way-cross hybrids commercially because of their attractive appearance and extreme uniformity. Use of single-cross and three-way-cross data for the prediction of desirable double-cross combinations creates additional interest in the performance of single crosses. Prediction studies are an extremely valuable part of a re- search program. Methods are available to predict the perform- ance of the better hybrid combinations without making and testing large numbers of undesirable crosses. For example, 1,225 single crosses and 690,900 double crosses are possible with 50 inbred lines. However, by using single-cross performance data, the corn breeder can predict which of the many possible double- cross combinations are likely to be most desirable. The following six single crosses can be made with four inbred lines: A X B, A X C, A X D, B X C, B X D, and C X D. The average per- Table 1. GENERAL INFORMATION: Tests of Illinois Experimental Corn Hybrids, 1955 County 8 Section of state Number of hills per plot Plants per hill Date of- Planting vSttag DeKalb Northern 10 10 10 10 4 4 4 3 May 20 May 19 May 17 June 3 Oct. 18 Oct. 11 Oct. 25 Nov. 1 Peoria North-Central Champaign Central Fayette South-Central a The fields are located near the following cities and towns: in DeKalb county near DeKalb, in Peoria county near Peoria, in Champaign county near Urbana, and in Fayette county near Brownstown. 6 BULLETIN No. 597 [January, formance of the four non-parental single crosses gives the predicted performance of a specific double-cross hybrid. For instance, the average yields of the four single crosses A X C, A X D, B X C, and B X D give the predicted yield of double cross (A X B) (C X D). The procedure in predicting acre yields and percentage of erect plants from single-cross data is shown below. The single-cross data are taken from Table 3. (R161xR168)(R170xR169) ( Rl 29xR 1 62 )( R 1 65xR 1 66) Bushels Percent Bushels Percent per acre of erect plants per acre of erect plants R161XR169 112 82 R129XR165 79 80 R168XR170 103 61 R129XR166 91 84 R161XR170 68 63 R162XR165 88 37 R168XR169 108 71 R162XR166 90 66 4 | 391 4 | 277 4 | 348 4 | 267 Prediction 98 69 Prediction 87 67 Similar predictions can be made for other characteristics. Pre- dicted hybrid combinations, however, should always be thor- oughly tested under field conditions before being put into com- mercial production. Three-way crosses also provide useful predictions of the per- formance of double-cross hybrids. A large number of inbred lines can be compared, and the method is especially valuable where a desirable seed-parent single cross is available for use as a tester. Three-way crosses provide information on specific hybrids and may often eliminate the time and expense required for testing inbred lines in top crosses and single crosses. The procedure in predicting acre yields and percentage of erect plants from three-way-cross data is shown below. The three-way-cross data are taken from Table 8. One hybrid is much more promising than the other hybrid. (WF9xHy)(R127xB38) ( WF9xHy )( N 1 5xN25 ) Bushels Percent Bushels Percent per of erect per of erect acre plants acre plants (WF9XHy)R127 116 80 (WF9XHy)N15 84 42 (WF9XHy)B38 108 J7J2 (WF9XHy)N25 97 62 2 | 224 2 | 152 2 | 181 2 | 104 Prediction 112 76 Prediction 90 52 1956} EXPERIMENTAL CORN HYBRIDS: 1955 TESTS 7 MEASURING PERFORMANCE All plots in these tests were planted, thinned, and harvested by hand in well-fertilized fields prepared in the usual way for corn. Individual plots were 2X5 hills in area. Six kernels were planted in hills spaced 40 inches apart. The plots were thinned to four plants per hill at DeKalb, Peoria, and Champaign, and to three per hill at Brownstown. Lattice-square designs were used to obtain the data reported in Tables 2, 4, 5, 6, 7, 11, and 12. The data in Tables 3, 8, 9, and 10 were obtained in randomized blocks. Data in Tables 8 and 10 are the means of three replications of each entry; data in all other tables are the means of four replications per entry. RESULTS OF THE TESTS Data obtained from the tests are summarized in Tables 2 to 12. Long-time averages are more reliable indexes of the perform- ance of hybrids than a single year's result. The parts of the tables summarizing the results of two or more years therefore deserve the most weight when the results are studied. Hybrids are listed in the tables in the order of their yield. Acre yields are reported as shelled grain containing 15.5 percent moisture, the maximum allowable for No. 2 corn. The crop from two replications of each entry at each location was shelled to determine the shelling percentage and moisture percentage. The percentage of moisture in the shelled grain was obtained with a Steinlite moisture meter. Erect plants at harvest and stand were determined from actual counts on all replications of each test. Data from all plots are included in the report on yield. The only correction for imperfect stands was the following adjust- ment for missing hills : /Number of hills \ /0.3 X Number of missing \ Corrected _ Field \P er P Iot / \ hills P er P lot weight " weight /Number of hills\ _ /Number of missing \ V per plot / V hills per plot / This adjustment adds 0.7 percent of the average hill yield for each missing hill, and assumes that 0.3 percent is made up by the increased yield of surrounding hills. Relative performance cannot be determined with absolute accuracy by any method of testing. Small differences between 8 BULLETIN No. 597 [January, entries are seldom of any significance. In fact, small differences are to be expected among plots planted even with the same lot of seed. Variations in growing conditions such as soil fertility are reduced but not completely eliminated by replicating the same entry several times in the same test. Unavoidable variation may be determined by a mathematical procedure known as analysis of variance. From this procedure figures may be ob- tained that represent the range which differences between two entries must exceed before those entries can be considered sig- nificantly different. The method used to determine this range is called the "Multiple Range Test." 1 This method considers the number of entries that fall within the range as well as the vari- ability of the test. Data shown in boldface were not statistically different from the best performance for that characteristic. The season was favorable for corn at DeKalb, although corn borers were quite prevalent. Hot, dry weather lowered yields at Peoria. Conditions were good for yields at Urbana, but wind and rain storms severely increased the amount of lodging. At Browns- town conditions were better than average for yield, but stalk rots greatly increased the amount of lodging. The following double-cross hybrids, arranged in order of yield, were outstanding in performance: Northern Illinois Five-year average: Table 2A 111. 1555A, 111. 1575, AES 702, 111. 1279, 111. 1289, 111. 1493. Four-year average: Table 2B AES 702, 111. 1277, 111. 1555A, 111. 1575, 111. 1279, 111. 1493. Three-year average: Table 2C 111. 1555A, 111. 1863, 111. 1279, 111. 1559B, 111. 1575, 111. 1281. Two-year average: Table 2D 111. 1555A, 111. 1281, 111. 1279, 111. 1559B, 111. 1575, 111. 1863. 1955 results: Table 2E 111. 1936, 111. 1279, 111. 1281, 111. 1863, Minn. 511, 111. 1799. North-Central Illinois Five-year average: Table 4A 111. 1511, 111. 274-1, 111. 1575, 111. 1760, AES 805, 111. 1560A. Four-year average: Table 4B 111. 274-1, 111. 1511, 111. 1555A, 111. 1831, 111. 1575, 111. 1760. Three-year average: Table 4C 111. 1332, 111. 274-1, 111. 1819, 111. 1875, 111. 1555A, 111. 1831. 1 "Multiple Range and Multiple F Tests," by D. B. Duncan, in Biometrics 11 (1), 1-43, 1955. 1956] EXPERIMENTAL CORN HYBRIDS: 1955 TESTS 9 Two-year average: Table 4D AES 806, 111. 1332, 111. 274-1, 111. 972A-1, 111. 1912, 111. 1919. 1955 results: Table 4E 111. 1916, 111. 274-1, 111. 1280, 111. 1555A, 111. 1913, 111. 1919. Central Illinois Five-year average: Table 6A 111. 1421, 111. 1511, 111. 972A-1, 111. 1332, 111. 1777, AES 805. Four-year average: Table 6B 111. 1421, 111. 972A-1, 111. 1332, 111. 1511, AES 801, 111. 1777. Three-year average: Table 6C 111. 1332, 111. 1813, AES 801, 111. 1880, 111. 1890, AES 805. Two-year average: Table 6D 111. 1919, 111. 1913, 111. 1909, 111. 972A-1, 111. 1332, 111. 1421. 1955 results: Table 6E 111. 1919, 111. 1421, 111. 1880, 111. 1332, AES 803, 111. 1889; Table 8 111. 1927, 111. 1921, 111. 1922, 111. 1926, 111. 1928; Table 10 111. 1935. South-Central Illinois Five-year average: Table 11 A 111. 1332, 111. 1349, 111. 1656, 111. 1539A, 111. 1771, 111. 2235W. Four-year average: Table 11B 111. 1851, 111. 1859, 111. 1656, 111. 1857, 111. 1332, AES 805, 111. 1849. Three-year average: Table 11C 111. 1859, 111. 1851, 111. 2246W, 111. 1332, 111. 1656, 111. 1857, AES 805, 111. 1849. Two-year average: Table 1 ID 111. 1857, 111. 1349, 111. 1893, AES 805, 111. 1332, 111. 1849. 1955 results: Table HE 111. 1893, AES 805, 111. 1849, 111. 1909, 111. 1918, 111. 1919; Table 12 AES 805, 111. 1919, 111. 1913, U.S. 619W. The following single crosses and three-way crosses were out- standing in grain yield and standability in 1955: Northern Illinois Table 2E M14 X B14, WF9 X 1.205; Table 3 R161 X R169, R165 X R168, R162 X R168, R166 X R168. North-Central Illinois Table 5 K1603-1-3 X (B14 X WF9), B40 X (Oh28 X Oh43), B35 X (Oh28 X Oh43). Central Illinois Table 7 R163 X R168, R159 X R168; Table 8 R127 X (WF9 X Hy) ; Table 9 ((Oh07 X L97)-B-#3-S6-2) X (38-11 X K201), ((Oh07 X L97)-B-#3-S2-l) X (38-11 X K201) ; Table 10 R71 X R163, R71 X R101, R71 X R105, R71 X R168. South-Central Illinois Table 12 R74 X (38-11 X K201), R75 X (38-11 X K201), Mo 9150 X (38-11 X K201), CI.49A X (K55 X H28), Mo9187W X (K55 X H28). 10 BULLETIN No. 597 [January, Table 2. DOUBLE CROSSES OF ILLINOIS 1277 MATURITY Tested in Northern Illinois, 1951-1955 (Data in boldface were not statistically different from the best performance for that characteristic) Rank in Entry yield Acre yield Mois- ture in Shelling grain Erect plants Stand Ear height A Five-year averages, 1951-1955 1 111. 1555A bu. 106 perct. perct. 22 80 27 77 26 75 25 78 25 78 24 78 25 76 26 78 24 78 27 77 25 78 25 . 77 26 76 25 77 24 77 25 78 25 78 23 78 24 77 22 80 25 76 24 78 25 78 perct. 92 94 92 90 95 92 94 97 94 89 94 96 91 95 98 94 90 91 90 91 96 95 93 perct. 98 98 99 98 98 96 98 96 98 96 97 96 97 97 98 98 95 97 95 95 97 98 97 in. 42 41 46 41 39 38 37 39 37 41 36 37 48 36 38 37 40 35 38 37 42 34 39 2 111. 1575 104 3 AES 702 103 4 111. 1277. . . 103 5 111. 1279 103 6 111. 1280. . 102 7 111 1289 102 8 111. 1493 .... 102 9 111. 1559B. 102 10 111. 1091A 101 11 111 1281 101 12 111. 1557 ... 101 13 111. 21 100 14 111 1558 100 15 111. 1560A ... 100 16 111. 101 99 17 111. 1290. . . 99 18 111 1375 98 19 111. 1585 98 20 Ohio K24 . . 98 21 111. 1595 97 22 111 1579 96 Average .... 101 B Four-year averages, 1952-1955 1 AES 702 112 23 77 22 79 21 80 24 78 21 79 25 76 23 78 23 78 22 79 22 79 22 79 22 77 23 76 22 79 23 78 23 77 21 78 23 79 21 79 21 78 20 80 20 80 22 77 20 81 21 80 21 79 21 79 20 80 20 82 22 79 91 90 91 96 94 96 91 87 92 94 94 94 97 94 96 95 97 90 89 88 92 93 96 94 93 94 92 90 83 92 99 97 97 98 98 98 96 95 95 97 98 97 96 98 96 96 97 95 97 95 94 99 97 99 96 97 97 96 96 97 46 41 43 41 39 39 48 42 38 37 37 38 39 38 37 37 38 40 36 38 37 38 42 39 38 34 36 32 43 39 2 111. 1277. . . 112 3 111 1555A 112 4 111. 1575 ... 112 5 111. 1279. . . Ill 6 I.S.P. 2 110 7 111 21 109 8 111. 1091A ... 109 9 111. 1280. . . 109 10 111 1281 109 11 111 101 108 12 111. 1289 ... 108 13 111. 1493 108 14 111. 1559B 108 15 111. 1557 . 107 16 111. 1558. . 106 17 111 1560A 106 18 111. 1290 105 19 111. 1375. . . 105 20 111. 1585 104 21 Ohio K24 104 22 AES 512 103 23 111. 1595 103 24 111. 1799. . 103 25 111. 1802 103 26 111. 1579. . 101 27 111. 1800 101 28 AES 610 . . 99 29 Ohio M15 97 107 (Table is continued on next page) 1966] EXPERIMENTAL CORN HYBRIDS: 1955 TESTS 11 Table 2. Continued Rank in Entry yield Aorp Mois- A turein yiej grain Ailing g Stand Ear height Dropped ears C Three-year averages, 1953-1955 bu. perct. perct perct. perct. in. perct. i 111. 1555A. . . 116 22 81 89 96 42 2 111. 1277 113 22 80 87 97 41 3 111. 1861 113 20 81 86 98 38 4 111. 1863 113 24 79 92 97 35 5 111. 1279 112 22 79 93 98 38 6 111. 1559B.. . 112 23 79 91 99 39 7 111. 1575 112 24 78 94 98 42 8 111. 1281 Ill 22 80 92 96 37 9 AES702 110 23 77 88 99 46 10 111. 1091 A 110 23 78 83 94 42 11 111. 1375 . . 109 21 80 86 97 36 12 111. 21 108 23 78 88 96 48 13 111. 101 108 22 80 91 98 37 14 111. 1289 108 22 77 93 97 38 15 111. 1493 108 24 78 96 95 39 16 111. 1557 . . 108 24 78 94 95 37 17 111. 1866 108 23 79 91 96 37 18 111. 1280 107 22 79 89 95 37 19 111. 1585 107 22 79 84 97 38 20 I.S.P. 2 107 25 76 94 99 38 21 AES 512.. . 106 21 81 91 98 38 22 111. 1560A 106 22 78 97 97 38 23 111. 1862 106 22 80 89 95 33 24 111. 1864 106 22 80 91 97 34 25 111. 1865 106 23 79 90 96 35 26 111. 1595 . . 105 23 78 94 96 42 27 Ohio K24 105 21 81 89 93 37 28 111. 1558 104 23 78 93 96 36 29 111. 1799 104 20 81 92 99 38 30 111. 1802 104 22 80 91 98 37 31 111. 1290 . . 103 23 79 87 93 39 32 111. 1579 100 22 79 92 97 34 33 111. 1800 99 22 79 90 97 35 34 AES 610 98 21 81 87 94 33 35 Ohio M15 97 21 82 78 97 42 Average. . . . 107 22 79 90 96 38 D Two-year averages, 1954-1955 1 111. 1555A... 122 25 79 85 96 44 S 2 111. 1281 117 25 80 89 98 40 3 3 111. 1861 116 22 79 79 98 39 3 4 AES 702 114 25 78 84 99 49 11 5 111. 1279 114 25 78 90 97 40 4 6 111. 1559B.. . 114 26 76 88 98 42 4 7 111. 1277 112 25 79 81 96 43 5 8 111. 1375 112 24 79 80 96 38 3 9 111. 2247W 112 25 77 83 97 44 3 10 111. 1575 Ill 27 76 91 97 44 4 11 111. 1863. . 110 27 78 89 96 35 3 12 111. 1091A 109 26 76 76 93 43 3 13 111. 1289 108 26 75 90 98 40 5 14 111. 1557 108 27 77 92 96 39 5 15 111. 1864 108 24 77 88 95 36 5 16 111. 1866. . 108 26 78 88 95 39 2 17 111. 101 107 25 79 88 97 39 5 18 Ohio K24 107 23 80 86 92 37 4 19 I.S.P. 2 107 27 75 92 99 38 3 20 AES 512 106 24 79 86 98 40 6 21 111. 21 . . 106 26 76 85 96 48 3 22 111. 1493 106 27 77 95 92 41 3 23 111. 1560A.. . 106 24 77 95 96 40 4 24 111. 1585 106 24 78 80 96 40 5 25 111. 1595 106 27 77 91 96 44 2 26 111. 1799 . . 106 22 80 88 98 40 4 27 111. 1802 105 24 79 87 96 39 4 28 111. 1862 105 25 79 84 93 33 4 29 111. 1280 104 25 77 84 94 37 3 30 111. 1290 103 26 78 81 93 41 4 (Table is concluded on next page) 12 BULLETIN No. 597 [January, Table 2. Concluded Rank in Entry yield Acre yield Mois- ture in grain Shelling Erect plants Stand Ear height Dropped ears D Two-year averages, 1954-1955 (concluded) bu. perct. perct. perct. perct. in. perct. 31 AES 510 102 22 79 90 94 40 6 32 111.1865 102 26 78 86 96 37 5 33 111.1903 102 24 76 88 94 41 3 34 111.1558 100 25 76 89 95 38 2 35 AES 610 99 23 80 82 94 35 3 36 111.1579 99 25 78 88 97 35 5 37 111.1800 99 25 78 84 96 37 4 38 OhioM15 98 23 81 72 96 44 4 39 Ohio 5305 83 22 78 92 94 40 9 Average 107 25 78 86 96 40 4 E 1955 results (4 replications) Double crosses 1 111. 1555A 107 24 79 74 97 48 8 2 111.1375 98 23 79 68 97 38 4 3 111.1936 97 24 77 83 97 43 7 4 111.1279 95 24 78 88 97 41 4 5 111. 1281 95 23 80 84 97 38 4 6 111. 1863 95 25 77 84 95 38 5 7 Ohio K24 94 23 79 77 92 38 5 8 Minn. 511 93 23 79 84 97 41 2 9 AES 702 92 24 78 74 99 58 19 10 111. 1861 92 22 78 69 98 41 2 11 111.1862 92 24 79 76 98 37 6 12 111. 1277 91 24 78 72 99 45 6 13 111.1799 91 22 81 82 98 40 6 14 111.1802 91 24 79 77 96 40 5 15 111. 1091A 90 25 76 63 90 45 4 16 111. 1559B 90 24 75 80 98 44 8 17 111. 2247W 89 25 76 73 100 46 3 18 111.1864 88 24 76 80 94 39 6 19 111. 1866 88 25 77 86 95 39 3 20 I.S.P. 2 88 26 75 87 98 42 5 21 111. 1560A 86 24 77 92 97 41 6 22 111.1585 86 23 77 71 98 42 8 23 111.1595 86 25 76 88 95 45 4 24 AES 512 85 22 78 80 99 41 8 25 111.1575 85 26 76 86 98 46 6 26 111.1280 84 24 76 81 94 37 2 27 Ohio M 15 84 23 81 59 97 45 4 28 111.1865 83 24 77 79 95 39 7 29 AES 610 82 23 80 80 93 36 4 30 111. 101 82 24 78 82 97 38 6 31 111.1557 81 25 77 90 94 39 9 32 111.1800 81 24 77 79 97 39 7 33 AES 510 80 21 78 88 94 41 10 34 111. 1289 80 25 73 88 98 41 6 35 111.1558 80 24 76 84 96 39 2 36 111.1290 79 25 77 75 92 42 5 37 111. 1903 78 24 76 80 92 41 3 38 111.1937 78 27 74 89 98 42 6 39 111. 1579 77 25 78 87 99 36 9 40 Minn. CB8504.... 77 23 76 79 97 35 4 41 111. 21 76 26 75 77 95 51 3 42 111.1493 76 25 75 93 93 41 5 43 111. 1902A 72 25 75 71 97 43 3 44 Ohio 5305 70 23 77 87 97 42 17 Average 85 24 77 80 96 42 6 Single crosses 1 M14XB14.. 107 22 81 94 99 39 1 2 WF9XB14 107 24 77 78 95 46 7 3 Hy2XWF9 100 25 77 55 98 60 13 4 WF9XI.205 97 26 78 94 99 41 10 5 M14XWF9 92 24 77 58 98 45 5 Average 101 24 78 76 98 46 7 1956] EXPERIMENTAL CORN HYBRIDS: 1955 TESTS 13 Table 3. SINGLE AND DOUBLE CROSSES OF ILLINOIS 1277 MATURITY Tested in Northern Illinois, 1955 (Data in boldface were not statistically different from the best performance for that characteristic) Code Entry Acre yield Mois- ture in grain . Shelling Erect plants Stand Ear height Dropped ears A Single crosses bu. perct. perct. perct. perct. in. perct. 1 R129XR159 79 26 77 76 91 46 3 ?, R129XR161 73 24 77 63 98 49 3 1 R129XR162 90 24 77 54 94 48 4 R159XR161 80 27 77 73 98 47 7 5 R159XR162 77 27 78 82 98 45 1 6 R161XR162. . . 85 25 77 50 96 51 5 7 R129XR163 83 24 77 72 89 50 2 8 R159XR163 85 28 79 70 94 47 5 9 R161XR163 95 24 79 64 98 56 5 10 R162XR163 100 27 78 54 96 54 6 11 R129XR165 . 79 26 78 80 94 45 12 R159XR165 80 29 78 84 92 45 1 13 R161XR165 90 28 79 76 93 50 2 14 R162XR165 88 29 79 37 88 46 15 R163XR165 94 28 77 68 94 49 1 16 R129XR166 . 91 26 80 84 98 47 17 R159XR166 88 28 81 80 96 42 4 18 R161XR166 90 27 80 68 97 49 4 19 R162XR166 90 26 80 66 91 45 1 20 R163XR166 93 25 81 77 92 46 1 21 R165XR166. . . 98 29 81 69 99 47 1 22 R129XR168 98 26 78 88 100 49 3 23 R159XR168 92 28 77 97 97 46 1 24 R161XR168 88 25 80 79 96 50 4 25 R162XR168 104 26 80 80 99 46 26 R163XR168 . 97 27 80 88 84 50 4 27 R165XR168 110 30 80 83 96 48 3 28 R166XR168 102 26 81 86 98 46 29 R129XR169 97 27 80 64 98 51 1 30 R159XR169 95 29 79 79 98 51 1 31 R161XR169. . . 112 28 81 82 98 55 1 32 R162XR169 109 26 82 52 96 51 1 88 R163XR169 102 28 80 67 92 52 1 34 R165XR169 104 27 81 58 89 49 1 35 R166XR169 87 29 81 66 94 48 2 36 R168XR169 . 108 28 78 71 98 50 1 37 R129XR170 77 24 77 52 95 49 2 38 R159XR170 70 23 78 45 92 50 1 39 R161XR170 68 23 78 63 88 52 6 40 R162XR170 66 24 77 29 96 49 6 41 R163XR170. . . 87 24 75 46 96 52 5 42 R165XR170 58 23 79 29 86 48 4 43 R166XR170 81 24 79 55 96 49 4 44 R168XR170 103 24 78 61 97 53 5 45 R169XR170 96 25 80 41 95 53 6 49 M14XWF9 89 23 77 65 93 46 5 Average 90 26 79 66 95 49 2 B Double crosses 48 AES 702 ... . 96 24 77 77 96 57 26 46 111. 1277 94 24 79 71 97 49 6 47 111. 1575 90 26 76 77 96 50 3 Average 93 25 77 75 96 52 12 14 BULLETIN No. 597 [January, Table 4. DOUBLE CROSSES OF ILLINOIS 21 MATURITY Tested in North-Central Illinois, 1951-1955 (Data in boldface were not statistically different from the best performance for that characteristic) Rank in Entry yield Acre yield Mois- ture in Shelling grain Erect plants Stand Ear height A Five-year averages, 1951-1955 bu. perct. perct. perct. perct. in. 1 111. 972A-1 . . . 96 22 80 91 96 44 2 111.1332 95 20 81 92 97 44 3 111.1511 95 21 81 94 90 45 4 111.1617 95 22 78 90 93 42 5 111. 274-1 94 20 81 94 97 44 6 111. 1570. . . 93 22 78 88 98 45 7 111. 1555A 91 18 83 93 98 38 8 111.1575 91 22 79 94 98 39 9 111.1760 90 23 77 94 96 41 10 111.1280 89 19 83 91 97 37 11 111.1277.. . 88 20 82 93 97 39 12 AES805 87 22 77 96 94 41 13 111. 1560A 87 19 81 97 97 36 14 111.1290 86 19 82 92 95 37 15 AES702 85 21 78 92 97 41 16 Iowa 4297 80 20 80 93 92 38 Average. . . . 90 20 80 93 96 41 B Four-year averages, 1952-1955 1 111.1819.. . 95 19 80 91 97 41 2 111. 972A-1 94 22 80 90 95 45 3 111.1332 94 20 81 91 97 44 4 111. 274-1 93 20 81 93 98 44 5 111.1511 93 21 81 92 88 46 6 111.1617.. . 92 22 78 89 92 42 7 111.1570 91 21 78 87 98 45 8 111. 1555A 90 17 83 94 97 39 9 111.1814 90 22 79 95 95 38 10 111. 1831 90 22 80 95 96 38 11 111.1575.. . 89 21 79 94 98 39 12 111.1760 . 87 23 77 94 95 41 13 111.1826 87 22 80 93 97 36 14 111. 1277 86 20 82 92 97 39 15 111.1280 86 19 81 90 96 37 16 111. 1560A.. . . 86 18 81 96 97 37 17 111.1813 86 23 78 95 95 42 18 AES805 83 22 76 96 92 41 19 111. 1290 82 19 82 91 94 38 20 AES702 81 21 78 91 96 41 21 Iowa 4297 77 19 79 92 91 38 Average. . . . 88 21 80 92 95 41 (Table is continued on next page) 1956] EXPERIMENTAL CORN HYBRIDS: 1955 TESTS 15 Table 4. Continued Rani in yieh k Entry ( y^O 1 Mois- ture in grain She m - as Stand Ear height Dropped ears C Three-year avers iges, 1953-1955 bu. perct. peri :t. perct. perct. in. perct. 1 111. 1332 . . ... 86 20 81 90 96 41 2 111. 274-1 85 20 81 92 97 40 8 111. 972A-1 85 22 79 87 94 42 4 111. 1819 85 19 80 89 96 37 5 111. 1875 84 21 79 93 92 43 6 111. 1570 . 83 21 78 85 97 42 7 111. 1555A 82 18 82 91 97 36 8 111. 1617 82 22 78 87 94 40 9 111. 1831 82 22 80 94 95 34 10 111. 1511 81 21 81 91 84 41 11 111. 1814.. . 81 21 79 94 96 35 12 111. 1868 80 21 79 94 94 38 13 111. 2247W 80 20 79 84 96 39 14 111. 1575 79 21 79 91 98 36 15 111. 1760 79 22 77 92 94 38 16 111. 1280. . . 78 18 81 87 95 33 17 111. 1826 78 22 80 92 97 32 18 111. 1277 77 20 83 89 96 36 19 111. 1560A 77 18 81 95 96 34 20 111. 1813 77 23 78 94 97 39 21 111. 1863. . . 76 20 81 95 94 33 22 AES702 74 20 79 89 95 38 23 111. 1864 74 18 80 93 96 32 24 111. 1873 74 20 78 95 94 33 25 111. 1290 73 19 81 90 93 35 26 AES805 .... 72 22 76 94 90 38 27 Iowa 4297 67 20 79 92 90 36 Average. . . . 79 21 80 91 94 37 D Two-year avera ; ges, 1954-1955 1 AES806... . 88 24 78 89 99 36 3 2 111. 1332 88 22 80 89 100 38 2 3 111. 274-1 86 22 80 90 99 39 4 111. 972A-1 86 25 78 88 98 40 2 5 111. 1912 86 23 80 88 96 38 2 6 111. 1919. . . 85 22 79 90 98 39 2 7 111. 1913 84 22 80 84 96 39 2 8 111. 1916 84 22 80 81 97 39 2 9 111. 1917 84 22 79 84 93 38 10 111. 1511 83 23 79 91 96 40 8 11 111. 1617. . 83 25 76 86 95 37 2 12 111. 1819 83 22 78 88 98 36 5 13 111. 1875 83 24 78 93 96 40 6 14 111. 1555A 82 20 81 92 98 36 3 15 111. 1570 82 24 77 85 98 40 1 16 111. 1905. . 81 23 75 87 98 39 3 17 111. 1918 81 24 79 88 96 39 3 18 111. 1908 80 21 79 86 98 38 1 19 111. 1910 80 21 81 83 98 39 1 20 111. 1915 80 22 78 88 98 38 4 21 111. 1814. . . 79 24 77 92 97 35 2 22 111. 1909 79 22 79 84 97 39 5 23 111. 1914 79 24 77 91 99 39 4 24 111. 1906 78 24 77 86 98 39 4 25 111. 2247W 78 22 78 84 98 37 4 26 111. 1280. . . 77 21 79 88 97 31 4 27 111. 1760 77 25 76 92 99 36 3 28 111. 1831 77 25 79 94 98 33 3 29 111. 1868 77 24 78 94 95 37 4 30 111. 1575 76 25 77 92 98 36 4 31 Ohio 3247 . . . . 76 21 80 88 98 31 4 32 111. 1826 75 25 7 92 98 31 3 33 111. 1904 75 22 77 75 97 40 3 34 111. 6021 75 25 76 74 97 46 4 35 111. 1903 74 21 78 95 94 34 2 (Table is concluded on next page) 16 BULLETIN No. 597 [January, Table 4. Concluded Rank in yield Entry Acre yield Mois- ture in grain Shelling Erect plants Stand Ear height Dropped ears D Two-year averages, 1954-1955 (concluded) bu. perct. perct. perct. perct. in. perct. 36 111. 1277.. 73 22 81 89 97 36 1 37 111. 1560A . . . 73 20 79 94 97 35 I 38 111. 1813 73 26 76 93 98 38 3 39 111. 1863 73 24 79 94 95 33 3 40 111. 1290 72 21 80 88 97 34 3 41 111. 1911.. 72 26 77 89 94 41 4 42 AES702.... 71 23 77 92 96 37 3 43 111. 1864 70 21 79 90 100 30 3 44 111. 1873 67 23 75 95 98 32 3 45 AES805.... 65 24 74 94 95 36 3 46 Iowa 4297... 64 23 76 89 97 34 5 Average , 78 23 78 89 97 37 3 E 1955 results (4 replications) i 111. 1332 71 25 78 92 99 33 1 2 111. 1916 71 24 78 95 94 32 1 3 111. 1917 71 24 77 92 90 33 4 111.274-1.... 70 24 78 95 99 35 5 111. 1909 70 24 78 92 99 34 5 6 AES806.... . 69 26 77 90 98 32 5 7 Ind. 4656. . . 68 24 78 94 98 29 1 8 111. 1280 67 22 79 97 95 29 1 9 111. 1555A... 67 21 80 95 99 29 2 10 111. 1913 67 24 78 95 95 34 1 11 111. 1919. . . 67 24 78 94 98 33 1 12 111. 972A-1 . . 66 27 76 90 96 33 1 13 111. 1912. . . . 66 24 78 97 95 33 1 14 111. 1863. . . . 64 25 78 98 92 28 2 15 111. 1875 64 26 76 95 92 34 3 16 111. 1760. . . 63 27 75 97 99 31 2 17 111. 1831 63 26 77 96 97 28 1 18 111. 1910 63 23 80 94 96 33 19 111. 2247W. . 63 24 76 91 97 32 4 20 111. 1617 62 30 74 87 90 32 3 21 111. 1814. . . 62 26 74 99 94 31 1 22 111. 1826 62 28 78 95 96 26 3 23 111. 1903 62 22 77 99 91 28 2 24 111. 1868 61 26 76 95 92 32 5 25 Ohio 3247... 61 21 77 96 97 27 5 26 111. 1511. . 60 25 77 96 95 33 1 27 111. 1908 60 23 77 96 96 32 28 111. 1914 60 26 75 98 99 32 3 29 111. 1915 60 23 77 90 97 33 3 30 111. 1918 59 25 76 94 95 34 3 31 111. 1570. . . 59 26 74 93 98 34 1 32 111. 1819 59 22 77 98 96 29 3 33 111. 1813 58 27 75 96 98 33 3 34 111. 1905 58 24 73 92 97 32 2 35 AES702.... 57 24 76 97 95 34 5 36 111. 1560A... . 57 21 78 98 95 30 37 111. 1575 57 27 76 92 98 30 5 38 111. 1873 57 24 74 98 96 27 2 39 111. 1864 56 23 76 92 100 25 3 40 111. 21 54 26 76 96 100 32 4 41 111. 1906 . . . 54 26 76 96 97 33 3 42 111. 1907 54 25 77 93 96 31 43 Iowa 4297... 54 24 72 93 96 31 3 44 111. 1277 53 24 80 93 96 32 2 45 111. 1904 53 22 75 90 96 33 4 46 111. 1290. . . 52 23 79 96 96 29 5 47 111. 6021 52 27 74 85 95 40 3 48 AES805.... 51 26 72 97 95 30 3 49 111. 1911 51 32 74 98 91 36 2 Average 61 25 76 94 96 32 2 1956] EXPERIMENTAL CORN HYBRIDS: 1955 TESTS 17 Table 5. THREE-WAY AND DOUBLE CROSSES OF ILLINOIS 21 MATURITY Tested in North-Central Illinois, 1955 (Data in boldface were not statistically different from the best performance for that characteristic) Code Entry Acre yield Mois- ture in grain - ffi Stand Ear height Dropped ears A Inbred lines crossed with (B14XWF9) bu. perct. perct perct. perct. in. perct. 1 B39 . . . . 63 24 75 99 96 30 1 2 B40 . 72 27 75 98 98 34 1 3 B35 . 59 23 78 99 98 30 1 4 Oh460 . 56 21 75 93 95 23 5 Oh480 . 68 23 78 98 99 32 3 6 Oh481 . . . 71 24 76 99 96 30 3 7 N9206 . 61 23 80 97 99 30 1 8 K1603-1-3 . 84 25 79 99 99 31 2 9 N32 . 56 20 78 95 93 30 6 10 N6 . 69 24 77 99 96 28 1 11 N6/HG 91310-2. . . 61 24 74 100 98 27 2 12 N6/HG 91311-4 . 61 28 74 99 97 29 3 13 N6/HG 91313-4 . 68 27 78 98 97 33 5 14 N6/HG 91336-5 . 59 24 78 99 96 31 1 15 Oh45 . 73 26 78 98 96 26 2 16 Oh43. .. . 68 24 78 99 99 25 2 17 Oh28 . 67 22 77 97 97 30 18 B37 . 57 22 75 99 99 30 2 Average 65 24 77 98 97 29 2 B Inbred lines crossed with (Oh28XOh43) 19 B40... . 78 29 76 99 100 33 1 20 B35 . 80 24 81 99 98 27 21 Oh460 . 53 23 75 96 96 20 1 22 N9206 . 66 23 79 98 97 28 3 23 K1603-1-3 . 65 26 75 98 96 30 1 24 N32... . 58 23 80 92 96 27 1 25 N6 , 64 24 76 97 97 23 26 N6/HG 91310-2 69 26 77 97 99 25 4 27 N6/HG 91311-4 61 28 74 98 95 28 28 N6/HG 91313-4 65 26 78 96 96 30 3 29 N6/HG 91336-5... 64 26 80 97 97 26 1 30 B14 58 29 75 100 97 28 2 31 WF9 65 24 78 99 98 26 Average 65 25 77 97 97 27 1 C Double crosses 45 111. 1933 . . . 68 25 76 98 97 31 2 32 (WF9XB14)(Oh28XOh43) ... . 64 24 78 99 95 28 1 35 111. 1922 . 64 27 75 98 96 35 1 39 111. 1926 . 64 24 75 100 99 32 2 40 111. 1927 . 63 25 73 99 96 32 5 34 111. 1921 . 63 27 75 98 99 33 48 111. 1902A . 63 22 78 97 97 31 2 42 111. 1929 . 63 27 76 98 96 34 38 111. 1925 . 61 24 76 99 94 34 46 111. 1934 . 61 25 74 97 95 35 5 41 111. 1928. . , . 60 27 75 99 98 35 2 33 111. 1920 . 59 25 75 97 99 33 1 49 111. 1896A . 59 26 76 97 98 35 4 44 111. 1932 . 58 25 75 99 96 36 3 47 111. 1935 . 58 25 76 97 94 31 3 37 111. 1924 . . . 57 22 75 96 96 30 2 36 111. 1923 . 54 22 74 99 98 31 2 43 111. 1931 . 49 25 73 99 96 33 1 Average . 60 25 75 98 97 33 2 18 BULLETIN No. 597 [January, Table 6. DOUBLE CROSSES OF U. S. 13 MATURITY Tested in Central Illinois, 1951-1955 (Data in boldface were not statistically different from the best performance for that characteristic) Rank in yield Entry Acre yield Mois- ture in grain Shelling Erect plants Stand Ear height A Five-year averages, 1951-1955 bu. perct. perct. perct. perct. in. i 111. 1421 . . 95 17 83 77 98 44 2 III. 1511 93 17 83 76 99 48 3 111. 972A-1 92 16 80 76 99 47 4 111. 1332 92 16 82 81 97 46 5 111. 1777 90 17 81 74 99 46 6 111. 1788. . 90 18 79 71 98 48 7 111. 1759 89 18 80 73 98 46 S U.S. 13 89 17 81 69 98 51 9 111. 274-1 88 16 83 74 98 46 10 111. 1570 88 18 81 71 99 47 11 111. 1764. . . 87 17 79 74 99 48 12 AES 805 86 18 81 84 97 44 13 111. 1767 86 18 81 70 99 45 14 111. 21 85 17 83 72 98 47 Average. . . . 90 17 81 75 98 47 B Four-year averages, 1952-1955 i 111. 1421. . . 94 17 83 75 98 44 2 111. 972A-1 92 16 80 75 98 47 3 111. 1332 92 15 82 82 97 46 4 111. 1511 92 17 83 76 99 48 5 AES 801 90 17 80 84 96 41 6 111. 1777 . . 90 17 81 76 99 46 7 111. 274-1 89 16 83 75 97 46 8 111. 1570 88 17 81 75 99 48 9 111. 1788 88 17 79 70 98 48 10 Ohio 4808 88 17 81 74 98 41 11 U.S. 13... 88 16 81 72 97 51 12 AES 802 87 16 81 79 90 44 13 111. 1759 . 87 17 80 72 98 46 14 111. 21 85 16 83 76 98 47 15 111. 1767 85 17 81 75 99 45 16 AES 803... . 84 17 81 80 96 42 17 111. 1764 83 17 79 75 98 48 18 AES 805 80 17 81 85 96 43 Average. . . . 88 17 81 76 97 46 C Three-year averages, 1953-1955 i 111. 1421 . 91 17 84 67 97 43 2 111. 1332 89 15 83 76 96 46 3 111. 1511 89 17 83 70 98 48 4 111. 1896 88 16 83 70 98 43 5 111. 972A-1 87 16 80 67 98 47 6 111. 1777. . . 87 17 82 69 99 46 7 111. 1570 86 17 82 68 98 48 8 U.S. 13 85 16 82 66 97 50 9 111. 1788 84 17 80 61 98 47 10 111. 274-1 83 16 83 66 97 46 11 111. 1813. . 83 18 81 75 97 43 12 Ohio 4808 83 16 82 66 98 40 13 AES 801 . 82 16 79 79 95 41 14 AES 802 82 16 81 74 90 44 15 111. 1767 81 17 81 68 99 45 16 111. 21 . . 79 16 83 69 97 48 17 111. 1759 79 17 80 64 98 46 18 111. 1880 79 15 82 71 95 42 19 111. 1890 79 17 80 79 98 43 20 AES 803 78 17 81 74 95 41 (Table is continued on next page) 1966] EXPERIMENTAL CORN HYBRIDS: 1955 TESTS 19 Table 6. Continued Rank in Entry yield Arrp Mois- F f *JB U, Sh,,, lM * Stand Ear height Dropped ears C Three-year averages, 1953-1955 (concluded) bu. perct. perct perct. perct. in. perct. 21 111. 1764 . . 76 16 79 68 98 48 22 AES 805 74 17 81 81 95 43 23 111. 1884 73 16 78 79 96 45 24 111. 1877 72 16 80 82 98 40 25 111. 1889 71 18 78 83 98 45 26 111.6075.. . 70 16 83 50 97 42 27 111. 1876 69 16 79 73 96 44 Average. . . . 81 17 81 71 97 45 D Two-year averages, 1954-1955 1 111. 1919. . . 97 17 84 63 96 43 1 2 111. 1913 94 17 85 61 96 42 5 3 111. 1511 93 18 84 63 98 46 10 4 AES 806 92 19 84 59 98 40 9 5 111. 1909 92 17 84 63 96 46 7 6 111. 972A-1 . . . 91 17 79 65 98 45 6 7 111. 1332 91 17 84 71 95 43 4 8 111. 1421 91 18 84 66 96 41 3 9 111. 1918 91 17 81 59 97 44 5 10 111. 1777 90 18 82 64 99 43 5 11 U.S. 13... . 90 17 83 63 96 48 11 12 111. 1896 89 17 84 68 98 41 9 13 111. 1911 88 18 83 64 95 47 6 14 111. 1915 88 17 82 61 97 44 4 15 111. 1916 88 17 84 62 96 43 5 16 111. 274-1 . . . 87 17 83 62 95 44 2 17 111. 1570 87 19 82 67 98 44 13 18 111. 1788 87 18 80 62 97 43 5 19 111. 1908 87 17 85 62 95 44 5 20 AES807W 86 20 82 69 98 41 4 21 111. 1906. . 86 17 81 57 96 41 7 22 Ind. 2609 86 16 83 61 97 40 4 23 AES 801 85 17 79 75 96 39 3 24 111. 1914 85 18 81 57 98 44 3 25 111. 1813 83 19 81 69 99 42 10 26 111. 1905. . . 83 17 79 66 97 43 8 27 111. 1912 83 17 83 64 95 41 4 28 111. 1767 82 18 81 65 99 43 7 29 111. 1917 82 17 82 54 96 42 3 30 AES 802 81 17 80 71 87 43 8 31 111. 21 . . . 81 17 84 66 98 46 9 32 111. 1910 81 17 84 61 99 43 5 33 111. 6021 81 18 80 54 96 52 6 34 Ohio 4808 81 18 82 55 98 39 2 35 111. 1759 80 18 81 61 98 44 6 36 AES 803. . . . 79 18 81 70 96 41 6 37 111. 1880 79 16 83 65 96 40 6 38 111. 1890 78 18 80 76 97 42 7 39 111. 1904 76 17 80 55 93 44 4 40 111. 1764 75 17 79 64 97 47 4 41 AES 805.. . . 72 18 82 79 93 41 6 42 111. 6075 72 17 84 43 99 41 5 43 111. 1884 70 17 77 75 96 43 10 44 111. 1876 67 18 79 68 94 41 7 45 111. 1877 67 18 80 77 98 39 7 46 111. 1889 67 19 77 79 97 41 4 Average. . . . 83 17 82 63 97 43 6 (Table is concluded on next page) 20 BULLETIN No. 597 [January, Table 6. Concluded Rank in Entry yield Acre yield Mois- ture in grain Shelling Erect plants Stand Ear height Dropped ears E 1955 results (4 replications) Double crosses bu. perct. perct. perct. perct. in. perct. 1 111.1919.. ... 100 17 84 36 96 48 2 2 111. 274-1 99 17 85 29 91 51 3 3 111. 1909 99 17 86 36 96 51 11 4 111. 972A-1 98 16 82 49 98 50 12 5 111. 1421 97 17 86 44 93 45 4 6 111. 1880. . . 96 16 84 43 95 44 7 7 AES806 94 18 84 32 98 46 11 8 Ohio 4808 94 17 84 19 98 44 3 9 111.1332 93 16 84 53 93 46 8 10 111. 1767 93 17 81 43 100 46 11 11 111.1813.. . 93 19 82 47 99 49 17 12 111.1913 93 16 85 29 98 46 6 13 111.1916 93 16 85 36 97 47 8 14 111.1918 93 17 83 31 94 49 6 15 111.1905 92 17 81 42 95 49 13 16 AES803... . 91 18 83 47 93 47 7 17 111.1788 91 18 81 37 96 49 6 18 111.1915 91 16 84 33 97 50 7 19 111.1912 90 16 85 35 94 46 5 20 111.1889 89 18 80 58 98 47 7 21 AES807W... . 88 20 84 42 98 48 8 22 111. 1907 88 17 82 40 98 50 6 23 U.S. 13 88 17 83 39 95 54 18 24 AES 801 87 17 82 56 96 45 5 25 111.1511 87 17 84 40 98 49 15 26 111. 1777. . . 87 17 83 38 98 47 8 27 111.1906 87 17 81 36 97 46 7 28 111.1908 87 16 85 27 98 49 8 29 AES 802 85 17 83 46 94 48 11 30 AES 805 85 17 84 61 97 48 12 31 111.1759.. . 85 18 84 39 99 50 10 32 111.1884 85 16 82 56 95 49 13 33 111.1890 85 17 82 58 94 46 14 34 111. 1902 A 85 16 85 28 98 46 7 35 111.1910 85 17 84 33 99 49 6 36 111.1917 . 85 17 83 33 96 47 5 37 111.1570 84 18 83 49 98 49 16 38 111. 1764 84 18 81 38 99 53 7 39 111.1877 84 16 85 54 98 44 6 40 111.1914 84 17 82 26 98 49 5 41 Ind. 2609 . . . 84 16 85 39 95 43 5 42 111.1876 82 16 84 44 94 45 10 43 111. 1911 82 18 84 39 92 53 7 44 111. 21 81 16 85 36 97 50 10 45 111.1896 81 16 84 47 99 44 8 46 111. 6021 . 79 18 80 34 99 59 8 47 111.1904 73 17 82 22 92 50 5 48 111. 6075 73 16 85 16 99 47 3 Average 88 17 83 39 96 48 8 Single cross Hy2XOh7 113 16 85 37 97 51 4 1956] EXPERIMENTAL CORN HYBRIDS: 1955 TESTS 21 Table 7. SINGLE AND DOUBLE CROSSES OF U. S. 13 MATURITY Tested in Central Illinois, 1955 (Data in boldface were not statistically different from the best performance for that characteristic) Code Entry Acre yield ture in grain Shelling Erect plants Stand Ear height Dropped ears A Single < :rosses bw. perct. perct. perct. perct. in. perct. 1 R129XR159 . 84 16 83 26 97 42 2 R129XR161 81 16 84 13 93 45 3 R129XR162 55 18 82 7 95 45 4 R159XR161 83 16 84 22 99 45 2 5 R159XR162 67 17 84 35 92 44 6 R161XR162 . 53 18 84 15 96 48 1 7 R129XR163 86 16 82 24 95 46 8 R159XR163 96 16 83 38 97 49 1 9 R161XR163 90 16 85 13 98 49 10 R162XR163 70 18 82 25 95 50 1 11 R129XR165 . 82 16 83 30 95 39 12 R159XR165 79 16 86 48 94 45 1 13 R161XR165 75 17 84 7 89 42 14 R162XR165 50 19 82 7 95 43 15 R163XR165 81 17 81 20 97 46 2 16 R129XR166. . . 72 16 85 16 99 43 17 R159XR166 80 16 87 16 95 41 18 R161XR166 83 16 87 3 97 48 19 R162XR166 52 18 82 3 95 41 1 20 R163XR166 82 16 84 9 98 41 21 R165XR166 . 78 16 85 7 95 41 22 R129XR168 90 16 82 50 98 40 23 R159XR168 97 16 83 58 98 44 2 24 R161XR168 85 16 86 15 97 43 25 R162XR168 86 17 84 38 99 44 26 R163XR168. . . 107 16 84 56 99 44 2 27 R165XR168 91 17 83 32 98 43 28 R166XR168 88 17 85 14 96 42 29 R129XR169 84 18 85 17 94 46 1 30 R159XR169 89 18 85 32 98 49 1 31 R161XR169. . . 93 16 89 9 98 46 1 32 R162XR169 66 18 87 13 97 50 33 R163XR169 97 17 84 25 93 54 1 34 R165XR169 86 17 85 7 95 48 35 R166XR169 74 17 82 4 98 46 36 R168XR169 . 96 18 83 26 98 46 37 R129XR170 48 17 81 1 94 45 1 38 R159XR170 67 16 83 12 96 45 39 R161XR170 56 16 82 3 96 46 1 40 R162XR170 28 19 77 1 91 46 1 41 R163XR170. . . 55 18 80 11 95 51 2 42 R165XR170 18 17 83 2 90 42 43 R166XR170 69 17 82 2 94 41 44 R168XR170 94 17 84 30 96 45 45 R169XR170 50 18 82 5 95 47 Average 75 17 84 19 96 45 1 B Double crosses 46 111. 1332.. . 100 16 84 52 96 48 1 47 111. 1570 90 16 82 44 96 47 5 48 111. 1813 88 18 82 69 98 47 5 49 U.S. 13 86 17 83 38 98 49 1 Average 91 17 83 51 97 48 3 22 BULLETIN No. 597 [January, Table 8. THREE-WAY AND DOUBLE CROSSES OF U. S. 13 MATURITY Tested in Central Illinois, 1955 (Data in boldface were not statistically different from the best performance for that characteristic) Code Entry Acre yield Mois- ture in lg Erect Stand Ear height Dropped ears A Inbred lines crossed with (WF9 X Hy) bu. perct. perct perct. perct. in. perct. 1 B38... . 108 20 80 72 98 51 8 2 K720 94 19 82 82 98 46 12 3 K721 95 18 81 70 97 48 7 4 K722 89 17 81 87 97 42 7 5 N15 84 21 81 42 98 48 15 6 N25... . 97 18 81 62 93 47 7 7 N35 98 19 79 63 98 54 14 8 R109B 99 19 82 69 98 49 7 9 R127 116 19 84 80 99 47 3 10 R129 84 17 82 72 98 45 8 11 R154. .. . 100 18 82 37 98 51 2 12 L317 104 19 79 53 96 57 12 13 38-11 104 19 82 58 98 46 5 Average 98 19 81 65 97 49 8 B- Inbred lines crossed with (WF9 X 38-11) 14 B38. . . . 86 19 81 85 89 47 6 15 K720 81 19 82 84 98 39 18 16 K721 85 17 82 78 97 43 3 17 K722 85 18 82 94 99 39 5 18 N15 81 21 81 55 83 48 22 19 N25... . 75 18 82 73 81 46 5 20 N35 89 18 81 80 95 49 7 21 R109B 86 18 84 75 96 46 8 22 R127 95 19 82 71 99 45 23 R129 85 18 83 84 94 42 3 24 R154... . 91 18 81 73 93 50 2 25 L317 90 19 79 57 92 58 15 26 Hy 77 18 82 64 90 52 6 Average 85 18 82 75 93 46 8 c Double crosses 35 111. 1927. . . 105 19 80 83 97 51 11 29 111. 1921 105 20 80 78 99 48 4 30 111. 1922 102 21 81 84 94 52 8 34 111. 1926 100 19 81 79 98 49 9 36 111. 1928 99 19 81 80 95 51 5 28 111. 1920. . . 97 18 83 76 94 46 10 33 111. 1925 96 19 81 74 99 48 6 32 111. 1924 94 18 83 75 98 46 6 40 111. 1933 93 20 81 76 94 51 7 37 111. 1929 93 20 80 79 98 55 2 39 111. 1932.. . 91 20 80 70 97 52 6 31 111. 1923 90 18 81 78 99 46 12 27 U.S. 13 89 19 78 64 94 57 11 38 111. 1931 88 18 80 66 95 51 4 Average 96 19 81 76 96 50 7 1956] EXPERIMENTAL CORN HYBRIDS: 1955 TESTS 23 Table 9. BLIGHT-RESISTANT THREE-WAY CROSSES AND STANDARDS OF U. S. 13 MATURITY Tested in Central Illinois, 1955 (Data in boldface were not statistically different from the best performance for that characteristic) Code Entry yield Mois- ture in Shelling grain Erect plants Stand hetht Dropped ears A Inbred lines crossed with (38-11 XK201) 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Hy bu. 67 perct. 19 21 20 19 22 20 19 20 18 18 20 18 19 19 19 21 20 20 21 20 20 19 22 perct. 83 83 84 84 80 80 81 78 80 82 81 84 82 82 81 81 81 85 82 83 81 83 82 perct. 79 63 57 62 59 77 64 81 79 68 74 53 71 63 77 72 65 76 78 78 68 69 70 perct. 97 94 96 96 98 96 94 97 94 98 96 89 97 95 92 97 94 95 94 95 97 96 95 in. 49 51 55 55 54 55 54 58 55 50 57 54 54 62 53 60 61 62 62 59 50 60 56 perct. 7 8 7 3 2 9 5 6 21 12 7 4 8 5 7 7 10 13 11 8 7 9 8 CI.42A . 93 CI.42B 83 CI.42C . . 92 (HyXL97)-B-#3-Sl-l ... 83 (HyXL97)-B-#3-Sl-2. .. . 81 (HyXL97)-B-#3-Sl-3 (HyXL97)-B-#3-Sl-4 ... 89 . 66 (HyXL97)-B-#3-S4-l ... 80 (Hy X L97)-B-#3-S4-2 95 (HyXL97)-B-#3-S5-l. . 87 Oh07 . Ill ... Ill (Oh07XL97)-B-#3-S2-l (Oh07 X L97)-B-#3-S4-l 111 (Oh07XL97)-B-#3-S6-l (Oh07XL97)-B-#3-S6-2. . . (Oh07XL97)-B-#3-S7-l ... 101 112 ... 99 (Oh07 X L97)-B-#3-S8-l . 101 (Oh07XL97)-B-#3-S9-l ... 88 (Oh07XL97)-B-#3-S10-l ... 98 (Oh07 X L97)-B-#3-S10-2 94 (Oh07 X L97)-B-|3-S10-3 . . . ... 99 93 B Single crosses 34 35 38-11XK201. . . 85 19 17 18 83 83 83 67 49 58 82 99 90 55 50 52 17 2 10 Hy2XOh07 113 99 24 BULLETIN No. 597 Table 10. SINGLE AND DOUBLE CROSSES OF U. S. 13 MATURITY Tested in Central Illinois, 1955 (Data in boldface were not statistically different from the best performance for that characteristic) Code Entry Acre yield Mois- t Shelling Erect M Ear Dropped A Single crosses 1 R71XR74 bu. 85 perct. 19 perct. 84 perct. 77 perct. 96 in. 41 perct. 6 2 R71XR101 100 17 84 73 97 43 1 3 R71XR105 98 19 82 89 98 47 4 4 R74XR101 . 82 17 80 80 95 43 1 5 R74XR105 79 17 83 72 96 46 10 6 R101XR105 . 70 16 82 80 94 47 1 7 R71XR129 84 18 82 80 94 43 4 g R74XR129 . . . 98 17 82 21 97 43 2 9 R101XR129 93 17 82 72 88 45 1 10 R105XR129 92 17 84 71 88 48 6 11 R71 XR163 103 18 82 78 94 48 5 12 R74XR163 . 94 17 81 65 97 48 1 13 R101XR163 101 16 82 51 93 51 1 14 R105XR163 100 18 84 54 93 51 5 15 R129XR163 .... . . 84 17 84 12 93 47 2 16 R71XR168 . . 96 17 85 88 98 44 17 R74XR168 85 18 81 43 97 42 18 R101XR168 85 18 83 65 96 43 19 R105XR168 .... 90 17 84 67 96 45 1 20 R129XR168 101 17 84 50 97 43 4 21 R163XR168 . 94 17 78 62 98 45 1 92 17 83 65 95 45 3 B : Double crosses 22 111. 1332 . 98 16 86 54 96 50 9 24 111. 1935 97 17 83 69 99 48 11 23 111. 1934 89 17 83 56 97 52 13 95 17 84 60 97 50 11 1956] EXPERIMENTAL CORN HYBRIDS: 1955 TESTS 25 Table 11. DOUBLE CROSSES OF ILLINOIS 448 MATURITY Tested in South-Central Illinois, 1951-1955 (Data in boldface were not statistically different from the best performance for that characteristic) Rank in yield Entry Acre yield Mois- ture in grain Shelling Erect plants Stand Ear height A Five-year averages, 1951-1955 bu. perct. perct. perct. perct. in. i 111. 1657.. 70 21 80 62 99 45 2 111. 1570 69 16 80 68 99 40 3 111. 1332 68 16 82 77 99 40 4 111. 1349 68 18 82 75 99 46 5 III. 1656 68 17 82 73 100 40 6 U.S. 13 . 68 16 82 64 99 43 7 111. 1539A 67 19 79 72 100 46 8 111. 1771 66 19 78 79 97 44 9 111. 1788 66 17 79 68 99 41 10 111. 2235W 66 20 78 75 99 46 11 111. 2214W . 64 18 78 65 99 45 12 111.200 62 18 79 62 100 45 13 Mo. 804 60 18 76 67 99 49 Average. . . . 66 18 79 70 99 44 B Four-year averages, 1952-1955 i 111. 1851.. . 64 18 79 67 99 45 2 111. 1570 63 16 79 64 99 41 3 111. 1859 63 16 80 68 99 44 4 111. 1656 62 17 82 70 100 41 5 111. 1856 62 19 80 64 99 44 6 111. 1857.. . 62 19 78 70 99 46 7 U.S. 13 62 15 82 63 99 44 8 111. 1511 61 16 83 63 97 42 9 111. 1332 60 16 81 72 99 41 10 111. 1349 60 17 81 72 99 46 11 AES 805. . . . 59 16 80 75 99 41 12 111. 1657 59 21 79 55 98 44 13 111. 1788 59 17 79 63 98 43 14 HI. 1849 58 20 76 78 98 43 15 111. 1852 58 18 76 68 99 45 16 111. 1539A.. , . 57 19 78 69 100 45 17 111. 1771 56 10 77 75 97 44 18 111. 1850 56 20 76 74 98 44 19 111. 2235W 56 20 77 71 99 46 20 111. 200 55 18 78 58 99 47 21 111. 2214W. . . 50 18 76 58 99 44 22 Mo. 804 50 18 76 64 99 49 Average. , 59 18 79 67 99 44 C Three-year averages, 1953-1955 i 111. 1897 . . . 57 15 79 54 99 41 2 111. 1570 56 15 79 55 99 41 3 111. 1859 56 16 80 63 99 44 4 111. 1851 55 17 79 60 99 45 5 111. 1896 55 15 83 58 98 40 6 111. 2246W . . . 55 15 80 60 99 42 7 111. 1332 . 54 16 80 68 98 40 8 111. 1511 54 16 83 59 96 42 9 111. 1656 54 17 80 63 100 42 10 111. 1788 53 17 78 57 98 43 11 111. 1856. . . 53 18 79 59 99 43 12 111. 1857 53 19 78 63 98 45 13 111. 6076 53 15 80 43 99 41 14 U.S. 13 53 15 81 54 99 44 15 AES 805 52 15 80 69 99 40 (Table is continued on next page) 26 BULLETIN No. 597 Table 11. Continued [January, Rank in Entry yield A cre Mois- E t . ij ture in Shelling _!_< yleld grain plants Stand Ear height Dropped ears C Three-year averages, 1953-1955 (concluded) Int. perct. perct perct. perct. in. perct. 16 111. 1893 . . . 52 17 78 71 99 44 17 111. 1349 51 17 80 65 99 46 18 111. 1852 50 18 75 61 100 45 19 111. 1657 49 21 79 48 98 44 20 111. 1539A 48 18 78 60 100 45 21 111. 1849 . . 48 20 76 74 98 43 22 111.200 47 18 76 52 99 46 23 111. 1771 46 19 76 69 96 43 24 111. 2235W 46 19 77 65 99 45 25 111. 1850 45 20 76 68 98 44 26 111. 2214W. . . 40 17 75 48 100 44 27 Mo. 804 40 18 75 57 99 48 Average. . . . 51 17 78 60 99 43 D Two-year averages, 1954-1955 1 111. 1851 60 18 79 41 99 40 2 111. 1856 59 18 81 43 99 40 1 3 111. 1657 58 21 81 26 98 41 4 111. 1857 58 19 79 48 98 41 3 5 111. 1349 57 18 80 52 99 42 2 6 111. 1570. . . 57 17 79 35 98 37 2 7 111. 1656 57 18 80 45 100 38 1 8 111. 1852 57 19 77 45 99 41 9 111. 1859 57 16 79 46 98 40 1 10 111. 1893 57 16 78 57 100 42 2 11 111. 1896 . . . 56 16 81 41 98 37 2 111. 1897 56 16 78 32 98 37 13 111. 1909 56 16 81 45 99 38 2 14 111. 2246W 56 16 79 41 99 39 3 15 AES805 55 16 79 55 99 37 1 16 111. 1332 . . . 55 16 80 53 98 37 17 111. 1788 55 17 79 41 98 38 18 III. 1912 55 16 80 43 99 35 19 111. 1916 . 55 15 80 45 98 38 1 20 111. 1918 55 17 79 52 100 39 2 21 Mo. 8010W . . . 55 20 79 38 100 44 22 111. 1511 54 17 82 41 96 38 2 23 111. 1539A 54 18 79 43 100 41 1 24 111. 1849 54 19 80 61 98 40 4 25 111. 1910 54 16 82 35 98 38 26 111. 1913. . . 54 15 79 33 100 36 1 27 U.S. 13 54 16 79 35 98 40 1 28 111. 1771 53 19 79 54 95 39 29 111. 1850 53 20 79 54 99 41 1 30 111. 1914 53 17 79 45 99 38 31 111. 1919. . . 53 15 78 53 98 37 32 111. 2235W 53 19 77 48 99 42 2 33 111.6076 53 16 79 22 98 37 1 34 AES 903W 52 18 73 38 100 36 1 35 111. 1905 52 16 76 36 100 38 2 36 111. 1906 . . . 52 16 78 27 100 36 2 37 111. 1915 52 15 79 42 100 37 1 38 111. 200 51 19 78 30 99 43 1 39 111. 1908 51 16 77 33 100 37 1 40 111. 1911 51 18 79 42 100 40 41 111. 1917. . . 50 17 78 39 98 37 3 42 111. 1904 49 16 77 39 99 38 43 Mo. 804 48 18 76 39 100 44 1 44 111. 2214W 44 17 74 23 100 41 1 Average. . . . 54 17 79 42 99 39 1 (Table is concluded on next page) 1956] EXPERIMENTAL CORN HYBRIDS: 1955 TESTS 27 Table 11. Concluded Rank in Entry yield Acre yield Mois- ture in grain Shelling Erect plants Stand Ear height Dropped ears E 1955 results (4 replications) Double crosses bu. perct. perct. perct. perct. in. perct. 1 111.1856 ... 70 19 80 27 100 49 2 111. 1851 68 21 78 29 98 48 3 111. 1349 67 19 82 23 99 51 3 4 111.1852 67 21 77 29 99 50 5 111.1893 67 18 80 43 100 53 3 6 111. 1896 . . . 67 17 81 23 97 47 2 7 111. 1897 67 18 79 14 97 48 8 111.1912 67 17 81 28 99 46 9 111.1511 66 19 83 32 93 48 1 10 111. 1657 66 24 80 16 98 49 11 111.1916 . 66 16 80 32 96 48 1 12 AES805 65 18 80 37 100 47 1 13 111. 1849 65 22 81 41 96 50 3 14 111.1859 65 18 80 35 97 49 1 15 111.1909 65 16 81 40 98 48 1 16 111. 1910. . 65 16 81 20 97 49 17 111.1913 65 16 78 23 100 47 18 111.1915 65 15 80 28 100 48 1 19 111. 2246W 65 17 79 17 99 50 2 20 111.1570 64 19 78 23 97 48 3 21 111.1656.. . 64 19 80 31 100 47 22 111. 1857 64 21 78 28 98 51 2 23 111.1918 64 19 79 52 100 49 2 24 Mo. 8010W 63 22 80 21 100 56 25 AES903W 62 19 73 10 100 46 26 111. 1788. . . 62 19 78 27 97 48 27 111.1905 62 17 76 18 100 48 2 28 111.1919 62 16 79 43 96 48 29 111.6076 62 17 78 9 99 46 30 U.S. 13 62 17 80 22 97 50 31 111.1332.. . 61 18 78 43 97 46 32 111. 1539A 61 20 80 19 100 53 2 33 111. 1850 61 23 80 34 99 52 2 34 111.1906 61 17 77 9 100 46 35 111.1908 61 16 76 13 100 48 36 111.1917.. . 61 18 78 28 97 46 1 37 111. 2235W 61 18 78 21 98 54 38 U.S. 523W 61 19 76 10 100 50 39 111. 1771 59 21 79 32 97 48 40 111. 1914 59 18 77 24 99 47 41 111. 200. . . 57 21 78 17 99 56 1 42 111. 1911 57 19 80 26 100 50 43 111. 2214W 57 19 75 11 100 53 44 Tenn. 3742W 57 23 76 23 96 49 45 111. 1907 55 18 74 18 100 49 3 46 111. 1904. . . 52 18 77 30 98 50 47 111. 6021 52 17 75 22 100 56 48 Mo. 804 50 20 76 19 100 52 Average 62 19 79 25 98 49 1 Single cross Hy2XOh7 70 18 80 23 98 48 28 BULLETIN No. 597 [January, Table 12. THREE-WAY AND DOUBLE CROSSES OF ILLINOIS 448 MATURITY Tested in South-Central Illinois, 1955 (Data in boldface were not statistically different from the best performance for that characteristic) Code Entry A ture in f grain fedlfa, ; plants Stand Ear height Dropped ears A Inbred lines crossed with (38-11 XK201) bu. perct. perct. perct. perct. in. perct. i R71A. . ... 60 17 77 24 100 52 2 R74 74 20 78 11 99 51 3 R75 71 17 80 14 100 49 3 4 R83 66 17 82 8 99 51 5 R84 63 18 80 10 100 61 3 6 R89 . . . 76 20 81 8 100 58 1 7 R101 73 17 79 7 99 52 8 R105 66 23 80 9 100 58 1 9 R109B 65 17 82 4 97 48 11 R118 71 20 78 10 99 64 2 12 R127... 73 19 82 4 100 53 1 13 R128 72 16 83 7 100 53 14 R129 76 20 80 12 100 46 15 R154 72 18 82 5 98 53 16 Mo9150 75 22 80 17 100 54 17 Mo0221 . . . . 76 20 78 4 99 62 19 Mo01930.... 66 18 78 11 99 55 1 20 Mo01260.... 66 21 81 11 100 54 3 21 Mo01268.... 67 21 82 7 97 56 1 22 Mol918 62 16 80 20 97 49 Average , . . 70 19 80 10 99 54 1 B Inbred lines crossed with (K55XH28) 23 K64... 55 21 77 3 99 50 24 CI.64 71 20 81 97 48 25 Ky49 67 22 73 9 99 48 1 26 CI.49A 78 20 78 17 100 52 2 27 CI.49B 62 23 76 19 100 54 28 Mo21A. . . 61 24 81 7 80 60 29 Mo9187W. . . 73 19 79 12 99 46 30 K723 75 20 78 2 99 51 31 K731 67 25 78 92 51 32 K734 57 20 81 6 87 47 33 K735... . 75 22 76 8 98 49 1 34 K738 70 20 77 3 99 51 35 K739 75 19 80 2 95 54 36 K745 78 25 81 100 56 37 K693 53 20 76 10 100 43 1 38 K694... . 56 17 78 7 97 42 39 K697 76 23 75 5 97 41 1 40 K755 64 18 76 14 98 44 Average. . . 67 21 78 7 96 49 C Double crosses 41 AES805.. . . 76 17 79 18 100 44 1 42 111. 1850 74 21 79 11 96 54 45 111. 1919 74 17 81 19 98 44 46 Ind. 909A... 71 19 80 4 99 52 49 U.S. 620W.. 68 18 79 5 95 50 44 111. 1913. . 68 16 79 13 99 48 48 U.S. 619W. . 67 18 79 13 95 50 2 47 U.S. 523W.. 66 19 77 6 100 49 o 18 111. 1332 66 17 80 13 100 49 o 10 111. 1570 64 18 80 6 98 49 o 43 111. 1852 64 20 79 22 100 51 2 Average 70 18 79 12 98 49 1956] EXPERIMENTAL CORN HYBRIDS: 1955 TESTS 29 Table 13. AVERAGE PERFORMANCE OF INBRED LINES AS MEASURED IN SINGLE CROSSES' (Comparisons can be made only within each section) Rank in &_. yield Acre yield Mois- ture in grain o-n* hSSt Dropped ears A 111. 1277 maturity (summarized from Table 3) 1 8 4 5 7 8 9 10 R169 bu. 101 100 93 91 90 89 87 85 83 78 90 perct. 27 27 26 27 26 28 26 25 27 24 26 perct. 80 79 78 80 79 79 79 78 78 78 79 perct. 64 81 67 72 56 65 69 70 76 47 67 in. 51 49 51 47 48 47 51 48 47 51 49 perct. 2 2 3 2 2 1 4 2 3 4 2 R168 R163 R166 R162 R165 R161 R129 R159 R170 B U. S. 13 maturity (summarized from Table 7) 1 % 8 . 4 & 7 8 9 10 R168. . . . 93 17 17 17 16 16 17 17 17 18 17 17 84 83 85 84 85 83 84 84 83 82 84 35 25 15 32 11 20 8 18 16 7 19 43 48 48 45 46 43 43 43 46 45 45 1 1 1 1 R163 . 85 R169 82 82 78 76 R159 R161 R129 R166 . 75 R165 71 R162 . 59 R170 . 54 76 C U. S. 13 maturity (summarized from Table 10) 1 8 ' 8 4 5 7 R163. . . . 96 17 18 17 17 17 17 18 17 82 83 83 82 83 82 82 82 54 81 51 62 72 70 60 64 48 44 45 44 47 45 44 45 2 3 3 1 4 1 3 2 R71 94 R129 . 92 R168 . 92 R105 88 R101 . 88 R74 87 Average 91 Calculated for each inbred by averaging the performance of single crosses in which it was one of the parents. 30 BULLETIN No. 597 [January, Table 14. DOUBLE-CROSS HYBRID NUMBERS, PEDIGREES, AND INDEX TO TABLES Hybrid Pedigree Table No. Illinois hybrids 21 (Hy2 X 187-2) (WF9X 38-11) 2ABCDE, 4E, 6ABCDE 101 (M14XWF9)(187-2XW26) 2ABCDE 200 (WF9X38-11)(L317XK4) 11ABCDE 274-1 (Hy2XWF9)(Oh7X 187-2) 4ABCDE, 6ABCDE 972A-1 (Hy2XL317)(WF9XOh7) 4ABCDE, 6ABCDE 1091A (Hy2X 187-2) (M 14 XWF9) 2ABCDE 1277 (M14XWF9) (1.205X187-2) 2ABCDE, 3B, 4ABCDE 1279 (M 14 XWF9)(A375X 187-2) 2ABCDE 1280 (M14XWF9)(Os420X 187-2) 2ABCDE, 4ABCDE 1281 (M14XWF9)(A374XA375) 2ABCDE 1289 (M 14 XW22)(WF9X 1.205) 2ABCDE 1290 (M 14 X 187-2) (WF9X 1.205) 2ABCDE, 4ABCDE 1332 (Hy2XOh7)(WF9X 38-11) 4ABCDE, 6ABCDE, 7B, 10B, 11ABCDE, 12C 1349 (38-llXMo940)(K155XK201) 11ABCDE 1375 (M14XWF9)(N6XOh51A) 2ABCDE 1421 (Hy2XWF9)(P8XOh7). . 6ABCDE 1493 (WF9X 1.205) (OH28XW22) 2ABCDE 1511 (Hy2XWF9)(38-llXL304A) 4ABCDE, 6ABCDE, 11BCDE 1539A (38-11 XCI.7)(K201XCI.21E) 11ABCDE 1555A (WF9XOh51A)(I.224XOh28) 2ABCDE, 4ABCDE 1557 (M14XOh28)(I.205XOh51A) 2ABCDE 1558 (M14XWF9) (1.205 XOh28) 2ABCDE 1559B (M14XOh28)(WF9XOh51A) 2ABCDE 1560A (WF9XOh51A)(I.205XOh28) 2ABCDE, 4ABCDE 1570 (Hy2XOh41)(WF9X 38-11) 4ABCDE, 6ABCDE, 7B, 11 ABODE, 12C 1575 (M14XWF9)(L12XOh28) 2ABCDE, 3B, 4ABCDE 1579 (M14XOh43)(A73XOh5) 2ABCDE 1585 (M14XL289)(Oh5XOh43) 2ABCDE 1595 (WF9X 1.205) ( 187-2 XW22) 2ABCDE 1617 (WF9XB10)(Oh7XOh41) 4ABCDE 1656 (C103XHy2)(WF9X 38-11) 11ABCDE 1657 (K4XOh7)(K20lXCI.21E) 11ABCDE 1759 (WF9X38-ll)(Oh4CxOh45) 6ABCDE 1760 (WF9X38-ll)(Oh29XOh45) 4ABCDE 1764 (Hy2XWF9)(38-llXJ47) 6ABCDE 1767 (Hy2XOh45)(WF9X 38-11) 6ABCDE 1771 (Oh7BXCI.7)(T8XCI.21E) 11ABCDE 1777 (Hy2XWF9)(R114XR116) 6ABCDE 1788 (WF9X38-ll)(Oh41XCI.21E) 6ABCDE, 11ABCDE 1799 (M14XWF9)(B8XOh51A) 2BCDE 1800 (M14XWF9)(A73XA295) 2BCDE 1802 (M14XWF9)(A295XOh51A) 2BCDE 1813 (C103XOh45)(Hy2XWF9) 4BCDE, 6CDE, 7B 1814 (Hy2XWF9)(M14XOh45) 4BCDE 1819 (R2XWF9)(R61XOh43) 4BCDE 1826 (WF9XB35)(K237XOh45) 4BCDE 1831 (WF9XW146)(K237XOh45) 4BCDE (Table is continued on next page) 1956] EXPERIMENTAL CORN HYBRIDS: 1955 TESTS 31 Table 14 Continued Hybrid Pedigree Table No. Illinois hybrids (continued) 1849 (C103X38-11)(K201XCI.21E) 11BCDE 1850 (C103XCI.21E)(38-11XK201) 11BCDE, 12C 1851 (C103X38-ll)(Oh7XCI.21E) 11BCDE 1852 (C103XCI.21E)(38-llXOh7) 11BCDE, 12C 1856 (38-11 XOh7)(K201XCI.21E) 11BCDE 1857 (38-llXOh41)(K201XCI.21E) 11BCDE 1859 (38-llXOh7)(Oh41XCI.21E) 11BCDE 1861 (M14XWF9)(I.224XOh28) 2CDE 1862 (M14XWF9)(Oh43XOh51A) 2CDE 1863 (M14XWF9)(I.205XOh43) 2CDE, 4CDE 1864 (M14XWF9)(Oh43XW22) 2CDE, 4CDE 1865 (M14XWF9)(Oh5XOh43) 2CDE 1866 (M14XWF9)(Oh26AXOh45) . .2CDE 1868 (Cl03XOh43)(Hy2XWF9) 4CDE 1873 (C103XM14)(R75XOh43) 4CDE 1875 (C103X38-ll)(Hy2XWF9) 4CDE 1876 (R97XR98)(WF9X38-11) 6CDE 1877 (R99XR100)(WF9X38-11) 6CDE 1880 (R103XR104)(WF9X 38-11) 6CDE 1884 (C103XR100XWF9X38-11) 6CDE 1889 (C103XOh45)(38-llXOh29) 6CDE 1890 (C103XOh45)(R75X38-ll) 6CDE 1893 (C103X38-ll)(Oh7BXOh29) 11CDE 1896 (R138XR139)(R140XR141) 6CDE, 11CDE 1896A (R139XR141XR138XR140) 5C 1897 (R138XR141XR139XR143) 11CDE 1902A (R138XR142XR139XWF9) 2E, 5C, 6E 1903 (M14XWF9XR119XR120) 2DE, 4DE 1904 (R81XR85)(WF9X38-11) 4DE, 6DE, 11DE 1905 (R81XR120)(WF9X 38-11) 4DE, 6DE, 11DE 1906 (Hy2XWF9)(R81XR119) 4DE, 6DE, 11DE 1907 (R155XR156)(WF9X38-11) 4E, 6E, HE 1908 (R154XR155)(WF9X38-11) 4DE, 6DE, 11DE 1909 (R130XR151)(WF9X38-11) 4DE, 6DE, 11DE 1910 (R154XR156)(WF9X 38-11) 4DE, 6DE, 11DE 1911 (R130XR153)(WF9X38-11) 4DE, 6DE, 11DE 1912 (R151XR156)(WF9X38-11) 4DE, 6DE, 11DE 1913 (R151XR154)(WF9X38-11) 4DE, 6DE, 11DE, 12C 1914 (R153XR155)(WF9X38-11) 4DE, 6DE, 11DE 1915 (R151XR155)(WF9X38-11) 4DE, 6DE, 11DE 1916 (R130XR154)(WF9X38-11) 4DE, 6DE, 11DE 1917 (R153 XR1 54) (WF9X 38-11) 4DE, 6DE, 11DE 1918 (R151XR153)(WF9X38-11) 4DE, 6DE, 11DE 1919 (R130XR156)(WF9X38-11) 4DE, 6DE, 11DE, 12C 1920 (R71XR105)(R75X 38-11) 5C, 8C 1921 (R71XR105)(WF9X38-11) 5C, 8C 1922 (Hy2XWF9)(R71XR105) 5C, 8C 1923 (R71XR113)(R75X38-11) 5C, 8C 1924 (R71XR113XWF9X38-11) 5C, 8C 1925 (Hy2XWF9)(R71 XR113) 5C, 8C (Table is concluded on next page) 32 BULLETIN No. 597 Table 14 Concluded Hybrid Pedigree Table No. Illinois hybrids (continued) 1926 (R71AXR74)(R75X38-11) 5C, 8C 1927 (Hy2XWF9)(R71AXR74) 5C, 8C 1928 (R75X38-11)(R98XR105) 5C, 8C 1929 (R98XR105)(WF9X 38-11) 5C, 8C 1931 (R75X38-11)(R98XR113) 5C, 8C 1932 (Hy2XWF9)(R98XR113) 5C, 8C 1933 (C103XR101)(Hy2XWF9) 5C, 8C 1934 (Hy2XR66)(R75X38-ll) 5C, 10B 1935 (C103XR101)(R75X38-11) 5C, 10B 1936 (Hy2XWF9)(M14XB14) 2E 1937 (WF9XOh45)(Oh28XW22) 2E 2214W (R30XKy27)(H21XK64) 11ABCDE 2235W (H21XK64) (33-16 XMo2RF) 11ABCDE 2246W (R144XR145)(R148XR149) 11CDE 2247W (R144XR145)(R146XR148) 2DE, 4CDE 6021 (R75XR76)(R84XK4) 4DE, 6DE, HE 6075 (R75XR83XR78XR87) 6CDE 6076 (R76XR78)(R87XR117) 11CDE Miscellaneous hybrids AES 510 (WF9XW22XH19XB9) 2DE AES 512 (M14XWF9XB9XW22) 2BCDE AES 610 (M14XA73)(Oh43XOh51A) 2BCDE AES 702 (111. 1790) . . (C103XM14)(Hy2XWF9) 2ABCDE, 3B, 4ABCDE AES 801 (WF9XB7)(B10XB14) 6BCDE AES 802 (HyXWF9)(38-llXN6) 6BCDE AES 803 (WF9X 187-2) (N6XK148) 6BCDE AES 805 (111. 1770). .(C103XOh45)(WF9X38-ll) 4ABCDE, 6ABCDE, 11BCDE, 12C AES 806 (HyXWF9)(N6XN15) 4DE, 6DE AES 807W (H26XH27)(H28XH29) 6DE AES 903W (H28XK55)(H30XK41) UDE Ind. 909A (H21X 33-16) (K61XK64) 12C Ind. 2609 (WF9X38-ll)(H14XOh43) 6DE Ind. 4656 (WF9XP8)(H14XOh43) 4E Iowa 4297 (M14X187-2)(WF9Xl.205) 4ABCDE I.S.P. 2 (Cl03XOh45)(M14XWF9) 2BCDE Minn. 511 (A73XA401)(A286XOh51A) 2E Minn. CB 8504 (M14XW22)(Oh5XOh43) 2E Mo. 804 (38-11 XCI.21E)(K4XCI.7) 11ABCDE Mo. 8010W (K64XMo22)(TlllXT115) 11DE Ohio M15 (AXW23)(Oh26XOh51) 2BCDE Ohio K24 (WF9XOh51A)(Oh33XOh40B) 2ABCDE Ohio 3247 (Oh43XOh45)(Oh51AXW22) 4DE Ohio 4808 (Oh4CXOh51A)(Oh28XOh45) 6BCDE Ohio 5305 (A73XOh5)(Oh26AXOh51A) 2DE Tenn. 3742W HE U.S. 13 (HyXL317)(WF9X38-ll) . . .6ABCDE, 7B, 8C, 11ABCDE U.S. 523W (K55XK64)(Ky27XKy49) HE, 12C U.S. 619W (K55XCI.64)(Ky27XKy49) 12C U.S. 620W (H21X33-16)(K61XCI.64) 12C (WF9XB14)(Oh28XOh43) 5C 4500 1-56 S9334