Genetic variation, heterosis and heritability for yield and other quantitative traits in three chickpeas (Cicer arietinum L.) hybrids [segregating populations: potential as a breeding source for improving high yielding cultivars; Jordan]
1988
El-Shatnawi, M.K.J.
Continuous variation with transgressive segregation at F2 generation was observed for most of the traits studied except for weight of 100-seeds, plant height and days of flowering. The segregants beyond the short, small seeded and early parents. The estimates of heterosis, heritability and genetic advance were varied according to crosses and traits. However, genetic variability between the two parents of each cross was demonstrated to be essential for those genetic parameters. High estimates of broad sense heritability in both generation were obtained for pods per plant (0.74 - 0.94), plant height (0.72 - 0.89), days of flo1759wering (0.60 - 0.94) and days of maturity (0.67 - 0.91). High narrow sense heritability coupled with high observed genetic advance was estimated for number of pods per plant, weight of 100-seeds and for plant height, indicating that improvement of these traits could be achieved by selection in early generations. The highest positive association was between seed yield and number of pods per plant with r values ranged from 0.77 to 0.94, followed by the association of each of seed yield and number of pods per plant with each of primary and with secondary branches. Also the association of primary with secondary branches (r = 0.27 to 0.73), and plant height with lowest pod height (r = 0.21 to 0.69) was significantly posi
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