Genetic analysis for fruit yield and yield attributes in okra (Abelmoschus esculentus L. Moench)
Keywords: Okra, generation mean analysis, gene action, yield
AbstractThe components of gene effects for yield and its components in okra were studied using generation mean analysis from six generations (P1, P2, F1, F2, BC1, and BC2) derived from six different genotypes. Joint scaling test was applied to detect the presence of epistasis. Epistasis was detected in both the cases. Prevalence of duplicate type of epistasis was observed in all the cases except number of fruits/ plant, fruit length in C1 (IC 3307 x IC 433645), fruit diameter, inter node length in C2 (IC- 43736 x Parbhani Kranti), fruit length, fruit diameter and fruit weight in C3 (IC-342075 X IC-332453). Additive, dominance and epistatic gene effects contribute significantly to the inheritance of various yield characters studied. The joint scaling test confirmed the inadequacy of the additive dominance model in most of the crosses for majority of the characters and indicated the presence of epistasis. Low narrow sense heritability values for most of the characters indicating that these characters are more influenced by the environment and they cannot be improved by simple selection.
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