COMBINING ABILITY ANALYSIS OVER ENVIRONMENTS IN DIALLEL CROSSES OF PEA

Abstract

Combining ability studies were made over environments for yield and nine yield. contributing characters utilizing 12-parent diallel Fl progenies in pea (Pisum S4tif1um L). Both gea and scawere influencedby environments.This suggested thatto have an unbillsecl 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 l>e exploited following intermatingamongthe progenies within and between promising crosses in e.,ly segregating generations.