Abstract

                                Combining ability studies using 9 x 9 half diallel cross over four environments for two seed characters in Indian Mustard, revealed that additive gene effects were predominant for 1000-seed weight while non-additive gene actions were more important for oil content. The best general combiners were NDR-8501 and BHUR-5 for 1000-seed weight and PR-16 and NDR-8501 for oil content. Difference among environments as well as both general combining ability (gca) x environment and specific combining ability (sca) x environment interaction were significant. Non-additive x environment interaction components were higher magnitude than the additive x environment interaction components.

Key words : Indian mustard, Combining ability, Gene effects