Genetic Architecture of Synchronous Pods Maturation and Yield Related Traits in Mungbean [Vigna radiata (L.) Wilczek]

Abstract

The mode of inheritance of days to flowering and pods maturation at different phases, synchrony in pods maturation and yield related characters in mungbean were examined in F1, F2, BC1, and BC2 generations of two crosses by utilizing four parents who differed for each character through generation mean and variance analyses. Digenic epistatic interactions were engaged in both the crosses for all the traits studied except for days to ninety percent pods maturity, degree of indetermination of pod maturity from first flower to first pod maturity (DDd3) and seed yield in NM-2006 × AUM-9 cross, where additive and dominant gene effects were prominent. Genetic variance analysis revealed the preeminence of additive and environmental components for the inheritance of investigated characters with the primacy of only additive genetic component. Narrow sense heritability estimates both in F2 and infinity generation also showed the pre-pondrance of only additive gene action for the inheritance of all the studied traits in both the crosses. Intercrossing of F2 plants with earliness, synchronized pods maturation with high yielding ability and eventually selection in the latter generations of segregating populations are recommended for the exploitation of the complex inherited traits and particularly for developing green gram lines with higher seed yield and improved synchrony in pod maturity

Keywords

• Degree of indetermination, Gene action, Synchronous maturity, yield