Genetic Diversity and Association Studies in Asian Cotton(Gossypium arboreum L.)

Author: Hrushik K. Vadodaria, Dharmendra R. Patidar, Sushil Kumar, Dinesh J. Parmar and Nil A. Patel

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Abstract

Thirty diverse accessions of asian/desi cotton (Gossypium arboreum) were evaluated for 15 quantitative traits, during Kharif - 2021-22 at Regional Cotton Research Station, Anand Agricultural University to study the genetic variability, heritability, genetic advance as percent of mean, correlation and path coefficient analysis. The analysis of variance revealed significant differences among genotypes for all the characters under investigation. The magnitude of phenotypic coefficient of variation was higher than genotypic coefficient of variation for all the traits. High heritability coupled with high genetic advance as per cent of mean were recorded for the characters viz., monopodia per plant, sympodia per plant, bolls per plant, boll weight, seed cotton yield per plant, lint yield per plant, ginning out turn, seed index and fibre fineness suggesting the major role of additive gene action in the inheritance of these traits. Among all characters studied sympodia per plant, bolls per plant and lint yield per plant showed positive and significant correlation with seed cotton yield per plant at both genotypic and phenotypic levels. The results of path analysis indicated that lint yield per plant, bolls per plant, fibre fineness, days to maturity and plant height exerted a strong positive direct effect on seed cotton yield

Keywords

Asian cotton, genetic variability, heritability, Genetic advance, Correlation coefficient, Path analysis

Conclusion

The findings of present experiment led to the conclusion that isolation of genotypes with higher seed cotton yield along with good quality is possible amongst the genotypes studied. The characters viz., monopodia per plant, sympodia per plant, bolls per plant, boll weight, seed cotton yield per plant, lint yield per plant, ginning out turn, seed index and fibre fineness displayed sufficient variability, high heritability and high genetic advance. Hence, these characters were mainly governed by additive gene action and could be improved by selection. The correlation study revealed the importance of characters sympodia per plant, bolls per plant and lint yield per plant for enhancing seed cotton yield. Further, path coefficient analysis discovered that lint yield per plant and bolls per plant could be considered as major yield components and should be given due weightage while exercising selection because of their high positive direct effect as well as positive correlation with seed cotton yield

References

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How to cite this article

Hrushik K. Vadodaria, Dharmendra R. Patidar, Sushil Kumar, Dinesh J. Parmar and Nil A. Patel (2024). Genetic Diversity and Association Studies in Asian Cotton (Gossypium arboreum L.). Biological Forum – An International Journal, 16(12): 06-12