Characterization and Genetic Analysis of Sweet Corn inbred Lines Adapted to Indian Conditions
Diversification of uses of maize is an effective strategy for enhancing the importance and acreage of maize in India, in which specialty corns in general and sweet corns in particular attract special attention. This investigation characterized 32 sweet corn inbred lines, and conducted genetic analysis for 18 crosses and their parental lines on the basis of field evaluation during kharif 2003 season at IARI, New Delhi, using the sweet corn composites Madhuri and Priya as checks. The sweet corn inbreds (SCI) differed significantly for yield and important yield attributes, and SCI-5,12 and 22 showed good per-se performance. There were significant differences among the inbred lines for total and reducing sugar content, and the most promising lines had around 15％ total sugar and 12％ non-reducing sugar in the matured, dried kernels. The line×tester analysis revealed significant differences among parents and hybrids, and the latter differed for most of the traits. Mean grain yields of T3, and L2 ×T1, were the highest among all parents and hybrids, respectively. Characters including days to silking and number of kernels/row in the ear were governed primarily by additive gene action, whereas yield, ear weight, days to tasseling, test weight and ear diameter were governed largely by non-additive gene action. Among the different groups, T1 (testers), L2 (lines) and L1 ×T2 (hybrid) were good combiners for yield and yield attributes. The five elite crosses exhibiting high heterobeltiosis merit further evaluation, and thus the present study was successful both in fulfilling immediate goals (of developing hybrids) and laying the foundation for a future strategy.
Lines Testers Combining ability Kernel sugar Sweet corn
Murali Mohan Raveendra Gadag
Division of Genetics, IARI, New Delhi-110012, India
国际会议
第九届亚洲玉米大会(the Ninth Asian Regional Maize Workshop)
北京
英文
83-85
2005-09-05（万方平台首次上网日期，不代表论文的发表时间）