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Combining ability analysis of quantitative traits in Rice Bean (Vigna umbellata (Thunb)

T.K. Mishra,Rashmita R. Panda, D. Bastia,L.K. Bose.


Combining ability analysis on of quantitative traits in rice bean Vigna umbellata [(Thunb.)Ohwi. & Ohashi] was studied using 6 x 6 parents half diallel cross in the F1 generation. The variancesdue to gca (except for clusters/plant) and sca were highly significant, indicating the prevalence ofadditive and non-additive gene action for all the traits studied. The estimates of gca components werehigher than sca components for all the traits, except clusters/plant indicating the predominance of theadditive gene action for the traits. Parents RBL-50/PRR-2, RBL-6/RBL-1, were good generalcombinations for pods/plant and clusters/plant respectively. RBL-17/KHRP-2, RBL-6/KHRP-2 andRBL-6/PRR-2 were good specific combinations for grain yield.

Key words: Combining ability, quantitative traits and rice bean.

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