Author(s):

Amit Kumar, N Pratap, RP Singh, Raj Shekhar, Umesh Babu, Vikram Kumar and Hari Shankar

Abstract: Combining ability studies for grain yield and its component traits in 48 crosses and their 16 parents (12 male and 4 CMS) mated in Line × Testers matting design. Combining ability revealed higher specific combining ability variance than their respective general combining ability variances indicating the predominance of non-additive gene effects indicated relevance of hybrid breeding programme for improving the yield and it’s contributing attributes. Among the lines CMS 6A and CMS 15A while among testers R5, R1, R7, R12 and R4, were good general combiners for yield and other related components, thus these were utilize as potential donor. Among these R5 showed good GCA for majority of the yield enhancing traits except days to 50% flowering. Out of 48crosses, two crosses viz. CMS 4A × R10 and CMS 14A × R10 were identified to exploit heterosis in positive direction with desirable SCA effects and high per se performance for yield and other traits and were found significantly desirable cross combination for heterosis breeding.

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