Combining ability and heterosis for yield and yield components in sesame (Sesamum indicum L.)

摘要

Fifty five F_1S from a half-diallel cross set were evaluated along with 11 parents to estimate combining ability and heterosis for 14 characters. Additive genetic variance was preponderant for days to flowering, plant height, 1000-seed weight and oil content. However, for the remaining characters both additive and non-additive gene actions were found to be equally important. TNAU 11, Kanak and Kayamkulam 1 were the best general combiners for seed yield. Heterotic hybrids were more frequently observed in crosses involving high X low gca parents. The correlations of gca effects with parental per se performance and sca effects with heterosis were highly positive and significant.