National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The present investigation was performed with fifty-three genotypes of Gossypium hirsutum L. cotton to get information on genetic variability, heritability and genetic advance as per cent of mean for yield, yield supporting and fibre quality attributes. The value of PCV was higher than GCV which explains that instead of genotypic component, the environmental component also influences in the expression of the character. The characters like number of bolls per plant, number of flower bearing nodes and seed cotton yield recorded higher values of GCV and PCV. Moderate values of GCV and PCV was observed for plant height, number of sympodia, length of internode, boll weight, seed index, lint index, ginning out turn and micronaire value. Length of sympodia resulted in moderate GCV and higher PCV. Lower values of GCV and PCV was observed for days to first flowering, days to fifty per cent flowering, days to first boll bursting, days to fifty per cent boll bursting, upper half mean length, uniformity index, fibre strength and elongation per centage. Higher heritability with higher genetic advance as per cent of mean was recorded by plant height, number of flower bearing nodes, boll weight and lint index. This suggests that these characters could be improved by simple selection because they are controlled by additive gene action. Number of sympodia, number of bolls per plant, seed cotton yield, length of internode and length of sympodia recorded moderate heritability and higher genetic advance which may be due to non-additive gene acion. Similarly moderate heritability and low genetic advance as per cent of mean was observed for uniformity index and elongation per centage and high heritability with moderate genetic advance as per cent of mean for days to first flowering, days to fifty per cent flowering, days to first boll bursting, days to fifty per cent boll bursting, upper half mean length, ginning out turn and seed index were due to non-additive gene action. Hence these traits will be improved through heterosis breeding or selection may be postponed to later generation.
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