U. P. Institute of Agricultural Sciences, Kalianpur, Kanpur-24
Online published on 25 January, 2012.
Six populations, namely P1, P2, F1, F2, B1 and B2 of half diallel of 8 different agro-ecological parents were studied for estimating nature and magnitude of genetic variance, gene effects, heritability and genetic advance for three quality characters namely, non-edible ratio, seed ratio & shell ratio in chillies (Capsicum annuum L.). All the treatments were found highly significant. As per scaling tests all the crosses showed non-additivity for all the characters. The estimate of genetic variances and gene effect showed that all the three types of gene actions and the variance arising due to them, i.e., additive, dominance and epistasis were present in varying proportion for three characters under study. Dominance and epistatic components were several times larger than additive effects for seed and non-edible ratio. A reverse trend was estimated in shell ratio. Significant dominance × dominance and additive × dominance interaction occurred in 55 percent of the crosses. Dominance × dominance interaction were mostly negative in non-edible and seed ratio attributes but positive in shell ratio trait. Heritability and genetic advance estimate showed a wide range of variation from low to very high values in the crosses. Under such a genetic structure it was suggested that reciprocal recurrent selection should be followed for most efficient utilization of all three types of gene effects.
