volume 36 issue 1 (march 2002) : 34 - 38
NATURE OF GENE ACTION FOR FLOWERING TRAITS IN PUMPKIN
1Department of Horticulture,
Orissa University of Agriculture and Technology, Bhubaneswar-75I003, India
ABSTRACT
Evaluation of 28 nonreciprocal F 1 hybrids of pumpkin revealed preponderance of domi nance and nonadditive gene action governing the inheritance of flowering attributes studied endured by low heritability in narrow sense. Pronounced epistasis was observed for number of flowers/plant. Overdomlnance was prevalent for all the traits. Frequent occurrence of dominant genes among parents were noticed for days to first male flower opening and node in which first male and female flowers appeared. Most dominant genes in the parents exerted positive effect for number of flowers/plant. Unequal distribution of positive and negative alleles showing dominance in parents were recorded for all the characters studied except number of flowers/plant. Heterosis breeding was suggested to develop early genotypes with higher number of flowers/plant, expected to improve productivity in pumpkin.
KEYWORDS
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Indian Journal of Agricultural Research
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