Inheritance of yield and other agronomic characters in the rice bean (Phaseolus calcaratus Roxb.)
1984
Kong, F.M. | Lantican, R.M.
The nature of inheritance of seed yield, pod length, number of pods per plant, 100-seed weight, number of seed per pod and days of flowering and maturity in rice bean was studied using a diallel cross of six parental lines, namely: Acc. 8, Acc. 2, Acc. 19, Acc. 14, Acc. 32, and Acc. 20. Analyses of variances showed that genotypic variations were present in all the characters. Further analysis of genotypic variances revealed that dominance effects were important for seed yield, number of pods 100-seed weight, number of seeds per pod and days to maturity. Additive genetic effects contributed significantly to pod length while both additive gene effects were responsibles for the inheritance of flowering period. For seed yield, pod number per plant, 100-seed weight, seed number per pod and days to maturity, the heritability estimates in the broad sense ranged from 32.24 to 78.66% while the narrow sense heritability ranged from 1.01 to 4.64%. The higher values of non-additive genetic variances relative to additive variances might be due to the presence of epistasis aside from dominance. The high estimate of heritability in the narrow phase for flowering period at 23.48, as compared to other characters, indicates that this character could be used as a basis for selection in early segregating generations
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