Gene action for certain quantitative characters in greengram (Vigna radiata (L.) wilczek)

The nature of gene effects for yield and six yield traits in greengram were studied in six crosses involving four parents through generation mean analysis. The mean data of six populations (both parents, F₁, BC₁, BC₂ and F₂) were subjected to scaling test. In the presence of epistasis, six-parameter model was used to detect all type of gene effects. The analysis indicated that most of characters appeared to be complex in the expression of gene effects in different crosses. The additive gene effect was important in most crosses for majority of the traits. The dominance gene action was involved in the expression of yield, pods/plant, plant height, pod length and dusters/plant in some crosses. Among the digenic interactions additive x additive and dominance x dominance played important role in the expression of plant height, branches/plant, dusters/plant, pods/plant and grain yield/plant in some crosses.