Analysis of variance for combining ability revealed that mean squares due to lines and testers were significant for all characters, indicated contribution of both lines and testers towards the general combining ability variance. The mean squares due to lines × testers were also significant for all the characters under study, which revealed the contribution of hybrids for specific combining ability variance component. This indicated involvement of both additive as well as non-additive components of gene action. The potence ratio (σ 2 gca/ σ2 sca) was below unity for all characters, which revealed preponderance of non-additive gene action in inheritance of all characters under study. | Combining ability and gene action studies for yield and its component traits in bread wheat Triticum aestivum L.
