Assessment of genetic variability of rapeseed-mustard germplasm under terai region of West Bengal
Abstract
An experiment was conducted at Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal during 2010-11 by using 50 genotypes of rapeseed-mustard germplasm to study the variability in seed yield and its attributing traits. Significant variation among all the genotypes was recorded for all the characters. Most of the characters had higher genotypic and phenotypic coefficient of variation which indicated that the expression of the characters in this germplasm had a genetic basis and can be exploited in breeding programs. The genotypes also exhibited varying degree of heritability and genetic advance. Characters such as days to 50% flowering, siliqua per plant and seed yield per plant had high broad sense heritability and high genetic advance. Seed yield per plant were significantly associated with days to 50% flowering and seeds per siliqua. Seeds per siliqua had significant positive correlation with height up to first fruiting branch and days to 50% flowering. The path coefficient analysis indicated high direct effect of siliqua per plant, seeds per siliqua and 100 seed weight on seed yield per plant.
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