Evaluation of P1, P2, F1, F2, B1 and B2 generations of ML 267 × LGG 528 cross of Mung bean for yield, yield attributes along with WUE and heat stress tolerance related traits using generation mean analysis

Abstract

The mean data obtained from six generations (P1, P2, F1, F2, B1 and B2) of selected superior crossML 267 × LGG 528for yield, yield components, WUE and heat stress tolerance related traits were subjected to generation mean analysis. Partitioning of generation means into six components revealed that the component mean [m] was positive and highly significant for all the traits. The results of scaling tests revealed that additive-dominance model was not sufficient to explain the inheritance of the characters studied. The inadequacy of additive-dominance model suggested the possible involvement of di-genic or higher order epistatic gene action in the expression of all the traits. It also indicated that presence of positively significant proportion of epistatic {[i], [j] and [l]} effects besides main {[d] and [h]} effects for yield, yield attributes, WUE and heat stress tolerance related traits.The findings divulged that both additive and the dominance components were important in the inheritance of yield, water use efficiency and heat stress tolerance related components.