GENETIC ANALYSIS OF THREE MUNGBEANCROSSES INVOLVING PARENTS WITH DIFFERENT PHOTOTHERMAL RESPONSE FOR GRAIN YIELD AND COMPONENT TRAITS

Abstract

The performance of hybrid generations of the cross Amp 45 x T44 having both the photothermal nonresponsive parents was better than the cross Amp 20 x L 24-2 involving responsive parents for pods/plant, branches/plant, tOO-grain weight and grain yield/plant. However, the performance of the cross Amp 45 X L 24-2 involving nonresponsive and responsive parents was the best. The analysis revealed that pods/plant, days to flower, grain yield/plant and plant height was governed predominantly by additive genes and duplicate digenic interaction in crosses involving parents of identical photothermal responsiveness while in the cross Amp 45 X L 24-2 all types of gene effect governed these traits. Transgressive segregates appeared in this cross. Intermating of transgressive segregates may lead to accumulation of favourable genes in the homozygous progenies.