Generation means analysis for fruit yield and its component traits in okra
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Epistasis, generation means, gene effects, okra.Issue
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Abstract
Experimental material comprised of five generations (P1, P2, F1, F2 and F3) of Pusa Sawani × HBT-36, JNDOL-05 × HB-25-2 and HB-25-2 × HBT-36 okra crosses. Five generations of these crosses were raised in randomized block design with three replications in rainy season of 2011-12. The observation for fruit yield per plant and its five component traits, viz., plant height, fruit length, fruits per plant, inter-nodal length and weight per fruit in five generations were recorded. The mean values of the five generations were subjected to C-scaling test (l) and five parameter method to find out the gene effects and interactions. The C-scaling test showed the evidence of epistasis for all six characters in all three crosses. All three types of gene effects namely additive, dominance and epistasis were found involved in the inheritance of the characters studied. The additive gene effects were relatively more important than the dominance gene effects for fruits per plant and inter-nodal length however, for fruit yield the dominance gene effects were observed important. Out of 18 cases, 13 cases designated preponderance of complementary type of epistasis.
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