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Crop Improvement
Year : 2005, Volume : 32, Issue : 1
First page : ( 92) Last page : ( 94)
Print ISSN : 0256-0933. Online ISSN : 2231-4563.

Genetic Architecture of Quantitative Characters in November Maturity Cauliflower

Jindal Salesh Kumar, Thakur J C

Department of Vegetable Crops, Punjab Agricultural University, Ludhiana-141004

Abstract

Twenty eight F1 hybrids of cauliflower (Brassica oleracea var. botrytis L.) in a diallel set involving eight parents (excluding reciprocals) were studied to investigate the genetic architecture of quantitative characters. Studies showed non-additive gene action (dominance or over dominance) governing the inheritance of all the characters under study endured by low to moderate heritability in narrow sense which suggested that heterosis breeding could be useful for obtaining higher gains for these characters. Frequent occurrence of dominant genes among parents were noticed for all the characters. Most dominant genes in the parents exerted positive effect for all the characters. Asymmetry of positive and negative alleles was noted for all characters. The role of environment in the expression of six characters, namely, net curd weight, days to curd maturity, curd diameter, curd depth, number of leaves per plant and dry matter content was also observed.

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Index Words

Cauliflower, gene action, heritability, heterosis breeding.

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