Licensed Inbreds

CornDent Corn Inbreds

The inbred lines of field corn listed below were produced in isolated fields. Although the fields were well isolated and carefully rogued, 100 percent freedom from contamination cannot be guaranteed. It will be necessary for the grower to do a limited amount of roguing and sorting. Seed of these inbred lines has not been treated with a fungicide.

 

 

Lines Available

Hand pollinated breeder seed of the following inbreds is available. Licensing by ISURF is required and commercialization of these lines may be royalty bearing.

B102

B102 was developed from a cross of B85 and H99. B85 was developed from BSCB6 (PA Early Syn) to provide a source of greater resistance to first-generation corn borer with earlier maturity. H99 was developed from IL Syn. (Oh43) and was used in cross because of good root strength and good general combining ability.

B103

B103 was derived from Pool 41, which was developed by CIMMYT. Pool 41 (NTR-1) is a genetically broad-based gene pool for the northern temperate region (460 - 520 N and S). Pool 41 includes 255 components, dominated by U.S. germplasm sources, but materials from Korea, Lebanon, and China also were included.

B104

B104 was developed from a strain [BS13(S)C5] of Iowa Stiff stalk Synthetic. BS13 (S)C5 has undergone seven cycles of half-sib recurrent selection with IA13 as tester [BS13(H)C&] followed by five cycles of S1-S2 recurrent selection to form BS13(s)C5. Hence, B104 was derived from BS13(S)C5 after 12 cycles of recurrent selection.

B105

B105 was developed from a strain [BSSS(R)C9] of Iowa Stiff Stalk Synthetic after nine cycles of reciprocal half-sib recurrent selection. Iowa Corn Borer Synthetic No. 1 [BSCB1(R)C9] was the tester population for developing the half-sib families within BSSS(R).

B106

B106 was developed from BS26. BS26 is a population of primarily Lancaster Sure Crop germplasm developed by intercrossing 13 inbred lines with five genetically broad based populations. The crosses were intermated five generations to form BS26. All of the inbred lines and populations included to form BS26 were classified in the Lancaster Sure Crop heterotic group.

B107

B107 was developed from Pool 41, which is a genetically broad-based population developed for temperate areas of the world by the CIMMYT maize breeding program. B107 includes unique germplasm than that commonly used in the U.S. Corn Belt breeding programs, and has good dry-down after physiological maturity, and has above average combining ability in crosses with lines from Iowa Stiff Stalk Synthetic (BSSS) and non-BSSS heterotic groups.

B108

B108 was developed from Pool 41, which is a genetically broad-based population developed for temperate areas of the world by the CIMMYT maize breeding program. B108 includes unique germplasm than that commonly used in the U.S. Corn Belt breeding programs, and has good dry-down after physiological maturity, and has above average combining ability in crosses with lines from Iowa Stiff Stalk Synthetic (BSSS) and non-BSSS heterotic groups.

B109

B109 is a recovered B73 that has exhibited improved combining ability in crosses, has similar grain moisture at harvest, and similar root and stalk strength as B73.

B110

B110 was derived by single-seed descent from BS13(S)C5, a strain of BSS that has undergone 12 cycles of recurrent selection for primarily grain yield. B110 is a vigorous line that has excellent plant health: above average to first- and second-generation European corn borer and early infection by gray leaf spot, and northern corn leaf blight.

B111

B111 was derived by single-seed descent from BSSS(R)C9, a strain of BSSS, that had undergone nine cycles of reciprocal half-sib recurrent selection with BSCB1(R). B111 is a vigorous health line that seems to possess tolerance to the European corn borer, gray leaf spot, and northern corn leaf blight.

B112

B112 was derived from BSCB1( R)C11, a strain of BSCB1 that had undergone 11 cycles of reciprocal half-sib recurrent selection with BSSS( R). B112 is a vigorous line with good early plant health. It is susceptible to second-generation European corn borer and northern corn leaf blight.

B113

B113 was derived from BS11(FR)9, a strain of BS11 that had undergone nine cycles of reciprocal full-sib recurrent selection with BS10. B113 is a vigorous line with excellent plant health with leaves that have an upright-leaf orientation with light green color. It seems to have above average tolerance to first- and second- generation European corn borer, gray leaf spot, and northern corn leaf blight.

B114

B114 was derived from the same program from which B103, B107, and B108 were developed. B114 seems to contribute to fast dry-down in crosses. It is susceptible to second-generation European corn borer but seems to have tolerance to first-generation European corn borer, gray leaf spot, and northern corn leaf blight.

B115

B115 was developed from BS11, a source that is different from most U.S. Corn Belt germplasm. It exhibits excellent plant health, indicating a good tolerance to most fungal leaf diseases and European corn borer.

B116

B116 was developed from the cross of B97 and B99, both lines that have been released from the Iowa State University corn breeding program. In the F2 generation of the B97 x B99 cross, B116 was developed via the typical pedigree selection methods. After extensive testing in Iowa and North Central Regional trials, B116 has exhibited superior performance for yield in testcross and single-cross trials.

B117

B117 was developed by pedigree selection from an F2 population from the cross of B97 B99. After testing in testcross and single-cross trials, B117 exhibited good combining ability and consistent high performance. B117 would be included in the non-BSSS heterotic group and has potential as a male parent of hybrids. License agreements with ISURF are required for this variety prior to purchase. Royalties for commercial purposes are $3.00 per MVK planted.

B118

B118 was developed by pedigree selection from an F2 population from the cross of B97 B99. After testing in testcross and single-cross trials, B118 exhibited good combining ability and consistent high performance. B118 would be included in the non-BSSS heterotic group and has potential as a male parent of hybrids. License agreements with ISURF are required for this variety prior to purchase. Royalties for commercial purposes are $3.00 per MVK planted.

B119

B119 was developed by pedigree selection from BS13(S)C7, which is a strain of Iowa Stiff Stalk Synthetic that has been under recurrent selection since 1939. B119 is a vigorous healthy line that has good, consistent yield performance in crosses to lines from the non-BSSS heterotic group. B119 has been a parent of crosses that have performed well compared with checks. It has the potential to be used either as a seed parent to produce hybrid seed or alternative germplasm source to include in elite elite line crosses for pedigree selection. License agreements with ISURF are required for this variety prior to purchase. Royalties for commercial purposes are $3.00 per MVK planted.

B120

B120 was developed by pedigree selection from BSCB1, an elite synthetic variety that has been under selection since 1949. B120 is included in the non-BSSS heterotic group and has potential use as a male pollinator or source of germplasm in pedigree selection programs. License agreements with ISURF are required for this variety prior to purchase. Royalties for commercial purposes are $3.00 per MVK planted.

B121

B121 was developed by pedigree selection from BS13(S)C6, which has been under continuous selection since 1939. After extensive testing, B121 had consistently good performance over a broad range of environments, from Texas to Delaware (NCR-167 trials in 2002). B121 is included in the BSSS heterotic group. License agreements with ISURF are required for this variety prior to purchase. Royalties for commercial purposes are $3.00 per MVK planted.

B122

B122 was derived from a narrow base synthetic (BSKRL2) composed of the five inbreds B90, B91, B95, B97, and B99. B122 has performed well on commercial tester inbreds from the stiff stalk heterotic pattern. It has better or comparable dry down, improved root and stalk lodging, and equivalent or better yield (depending on the tester) than comparable commercial checks.

B123

B123 was derived from a narrow base synthetic (BSKRL2) composed of the five inbreds B90, B91, B95, B97, and B99. B123 has performed well on commercial tester inbreds (particularly SGI912) from the stiff stalk heterotic pattern. It has better or comparable dry down, improved root and stalk lodging, and equivalent or better yield (depending on the tester) than comparable commercial checks.

B124

B124 was derived from a narrow base synthetic (BSKRL2) composed of the five inbreds B90, B91, B95, B97, and B99. B124 has performed well on commercial tester inbreds (particularly SGI912) from the stiff stalk heterotic pattern. B124 has shown a susceptibility to root lodging, but did show strong consistent yield on SGI912 winning in all 10 locations in 2002. In crosses with SGI912, B124 ranked 11 for grain yield (12 bu/ac less than the top commercial check.)

B125

B125 was derived from a narrow base synthetic (BSKRL2) composed of the five inbreds B90, B91, B95, B97, and B99. B125 has performed well on commercial tester inbreds from the stiff stalk heterotic pattern and seems to perform well with a broader range of testers than B122, B123, or B124. B125 has had outstanding resistance to root and stalk lodging and excellent dry down at harvest. When crosses with SGI890, B125 ranked 3 overall in the test for yield and was in the bottom 1/3 driest for grain moisture.