The Indian Journal of Genetics and Plant Breeding

Combining ability studies were made over environments for yield and nine yield contributing characters utilizing 12-parent diallel F₁ progenies in pea (Pisum sativum L). Bothgea and sca were influenced by environments. This suggested that to have an unbiased estimates of gca and sca, the studies may be conducted over a wide range of environmeots. Seed weight is observed to be a highly potent character among yield components over environments. Both additive and nonadditive genetic variances were important for all tae characters studied. The per se performance of the parents may give a good indication of their gca effects. The additive and nonadditive genetic variances may be exploited following intermating among the progenies with in and between promising crossesin early segregating generations.