General and specific combining ability for quantitative characters in castor (Ricinus communis L.)
Keywords: Castor, Ricinus communis, gca, sca, additive and non-additive, combining ability, potence ratio
AbstractThe experimental material consisted of ten monoecious lines, their 45 F1S developed through diallel mating excluding reciprocals was evaluated in Randomized Complete Block Design with three replications. The analysis of variance for combining ability revealed that mean square values due to both parents and hybrids were significant for all the characters suggesting an importance of both additive and non-additive gene effects for the inheritance of studied characters. However, values of potence ratio and predictability ratio revealed preponderance of additive genetic variance for all the characters. Parents ANDCI 10-12, ANDCI 8, ANDCI 10-4 and ANDCI 10-3 were good general combiners for seed yield per plant and other yield contributing characters. The hybids ANDCI 10-1 x ANDCI 9, ANDCI10-11 x ANDCI 10-12 and ANDCI 8 x ANDCI 10-11,had high per se performance, high heterotic effects and desired sca effects for seed yield per plant and its component characters.
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