GENETIC VARIATION, HERITABILITY AND RELATIVE CONTRIBUTION OF SOME YIELD TRAITS IN FABA BEAN PRODUCTIVITY

Abstract: Two field experiments were carried out at Nubaria Agricultural Research Station during the two winter seasons 2013/14 and 2014/15. Twelve faba bean genotypes were grown in a randomized complete block design with three replications to evaluate the performance for yield and its related traits. Variance of separate and combined analyses was computed to estimate some genetic parameters. Also, the associations among seed yield traits were studied using correlation and path analysis. Results showed significant differences among faba bean genotypes for all studied traits. Nubaria 1, Giza 716, Giza 843, 483/669/84 and 1001/543/84 gave the highest seed yield (ard/fed), 100-seed weight, number of seeds and pods per plant. Genotype x season interaction was insignificant for all studied traits except for flowering date, maturity date and 100-seed weight. This declared that the studied genotypes differed significantly for their ranks from one season to another. In the present study, the traits with high GCV% possessed high GS% percent and vice versa irrespective of the heritability estimates, indicating the importance of GCV%. High heritability (h2) estimates and high genotypic coefficients of variation (GCV %) coupled with high genetic advance (GS %) indicate that these traits (number of branches per plant, number of pods per plant and 100-seed weight) seem to be highly easily fixable and can be taken as unit character for effective selection. The high estimates of GCV%, h2 and GS % were observed for number of branches per plant, number of pods per plant and weight of 100-seeds regardless of the seasons which suggests the predominance of additive gene effects and that selection would be useful for the improvement of these traits. Correlation coefficients results suggest that selection for higher number of branches, 100-seed weight, number of seeds per plant and number of pods per plant would tend to increase seed yield in faba bean. Path analysis revealed that the traits i.e. number of pods, number of branches and the weight of 100 seeds gave the maximum influence directly and indirectly upon seed yield in faba bean, indicating their magnitude as selection criteria to obtain a valuable gain from selection for seed yield in faba bean.
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Publication year 2015
Pages 1963-1975
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Author(s) from ARC
Publication Type Journal
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