Correlation and path analysis for genetic divergence of morphological and fiber traits in upland cotton (Gossypium hirsutum L.)

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Research Paper 01/10/2015
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Correlation and path analysis for genetic divergence of morphological and fiber traits in upland cotton (Gossypium hirsutum L.)

Shoaib Liaqat, Rana Imtiaz Ahmed, Muhammad Rafiq, Saghir Ahmad, Abdul Qayyum, Makiya Rafiq, Amna Bibi, Nadia Hussain
Int. J. Agron. Agri. Res.7( 4), 86-94, October 2015.
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Seventy five genotypes of cultivated cotton (Gossypium hirsutum L.) were studied for morphological characteristics i-e plant height, monopodial branches, sympodial branches, boll weight, seed volume, seed density, seed index and fiber characters. Data were subjected to analysis of variance and estimates were made for genetic advance, broad sense heritability and coefficient of variance for the traits. ANOVA revealed highly significant variability among genotypes for all the characteristics studied. The estimates for heritability were higher for seed index (0.93) and plant height (0.93). The highest value (6.4) for genetic advance was observed for sympodial branches whereas lowest value was (0.17) for boll weight. Correlation analysis revealed positive and significant for most of the parameters. In path coefficient, the number of sympodial branches, boll weight, lint index and lint weight had maximum direct and positive effect on fiber fineness of seed cotton. Whereas, the number of monopodial branches, plant height, seed index, seed volume, seed density, staple length, fiber strength and ginning out turn (G.O.T%) had direct and negative effects on fiber of seed cotton. The principle component analysis (PCA) revealed significant differences between genotypes and the first four components with Eigen values greater than 1 contributed 66.68% of the variability among the genotypes. The grouping of genotypes possessing excelled traits signifies genetic potential of the germplasm for the improvement of seed and fiber characteristics in cotton crop.


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