Vol. 9, Special Issue 12, Part H (2025)

The mean of six generations in the cross indicated that, the F₁ means were higher than mid parental mean values which is comparable to better parent mean values in significant direction with respects to all the traits in present investigation which indicating the presence of over dominance. In the cross, F₂ means were lower than the F₁ mean except some cases. The mean of backcross populations tended towards their respective parents. These results indicated that the predominance of non-additive gene action which includes both dominance as well as epistatic interactions. The F₁ and segregating generations evolved from the cross combination phule-G-1420-13-6 x RSG-888 exhibited the higher mean values for grain yield and its contributing characters. Based on the substantial information obtained from mean performance of parents and segregating generations the parents. In the cross, individual scaling test and joint scaling test were significant for all the characters indicating the inadequacy of simple additive-dominance model, justifying the use of six parameters model for detection of gene interactions. The generation mean analysis revealed the significance of additive, dominance and epistasis gene effects were found operating the gene actions for grain yield and its contributing traits in chickpea in the cross.

The estimates of A, B, C and D scaling tests and joint scaling test were significant in the cross for sixteen characters with few exceptions. The significance of these cross for various characters indicated inadequacy of additive-dominance model.

1. For grain yield and yield components, the dominant component (h) and dominance x dominance (l) gene interaction was found significant for most of the characters viz, days to maturity, plant height, number of primary branches per plant, seeds per pod, grain yield per plant and relative water content, chlorophyll stability index, glycine betaine and stomatal frequency these characters can be improved by hybrid development or by recurrent selection for SCA.

Additive gene action along with additive x additive (i) followed by dominance (h) was found significant for the characters viz. days to maturity, plant height, number of primary branches per plant, yield per plant, relative water content, chlorophyll stability index, proline, glycine betaine and stomatal frequency. For improvement of these characters, one should follow the simple selection in early segregating generations.