Gene effects for yield and yield attributing characters in intra-specific crosses of mungbean (Vigna radiata (L.) Wilczek)

The genetic parameters controlling the expression of seed yield and the yield components have been studied using means of six generations (P₁, P₂, F₁, F₂, B₁ and B₂) in three inter varietal crosses of Mungbean (Vigna radiata (L.) Wilczek.). The scaling tests and joint scaling tests indicated presence of non-allelic interaction for all the traits in three crosses except for days to 50% flowering, in cross BPMR-145 x AKM-9910 while for number of primary branches per plant and number of clusters per plant in cross BM-2005 x NUL-605. Presence of additive, dominance and epistatic gene effects were observed in almost all the crosses, indicating importance of both additive and non-additive gene action for the expression of the characters viz., days for 50% flowering, days to maturity, plant height, no. of primary branches/plant, no. of clusters/plant, no. of pods/plant, pod length, no. of seeds/pod, 100-seed weight and grain yield/plant. Duplicate type of epistasis was prevalent for most of characters in all the crosses. Multiple crosses, biparental mating between desirable segregants in early segregating generations(F₂/F₃₎, transgressive segregation followed by effective selection of desirable recombinants in subsequent generation would be rewarding.