ESTIMATION OF HETEROSIS AND GENE ACTION FOR YIELD AND YIELD COMPONENTS IN FABA BEAN

Abstract

Six genotypes of faba bean were crossed in using half-diallel analysis method. During winter season of 2017, to produce fifteen F1 crosses. The parent and crosses were cultivated during winter season of 2018. By using R.C.B.D. with three replications to estimate different heterosis, general and specific combining ability effects, genetic parameters on single cross faba bean hybrids. For growth, yield, yield components and Quality. The analysis of variance showed that significant differences were found among parental and their crosses for all the traits. The results were showed that the hybrid (Turkish x Italian) gave highest for seed yield 116.20g, 100 seed weight 155g, number of seed pod-1 5.90, number of pod plant-1 16.30, number of branches-1 6.30. While the hybrid (Turkish × Italian) gave the highest heterosis 38.58% for seed yield, 100 seed weight 10.24%, number of seed pod-1 40.47%. Significant general and specific combining ability variance were observed for all traits, the overall study of GSA effect suggested that parent (Turkish) was significant for GCA for yield gave 5.12. However, the crosses (French × Turkish) showed highest SCA effect for seed yield gave 4.25. GCA variance was more than SCA, for traits number of branch plant-1, number of pods plant-1 and seeds yield indicates variance of additive gene more than nonadditive gene. The significant positive SCA of crosses could be used for commercial variety development. The values of the broad sense heritability were high for all the traits. The average of degree of dominance reduced one for most the traits. The results indicated that some genotypes could be used in breeding program to develop new hybrid with highest seed yield.