Abstract
BackgroundCotton is known for fiber extraction and it is grown in tropical and sub-tropical areas of the world due to having hot weather. Cotton crop has a significant role in GDP of Pakistan. Therefore, the two-years research was conducted to estimate heritability and association among various yield contributing parameters of cotton, i.e., plant height, number of bolls per plant, number of sympodial branches per plant, seed cotton yield, boll weight, seed index, ginning outturn (GOT), fiber length, fiber strength, and fiber fineness.ResultsAssociation analysis revealed that seed cotton yield had a significant positive correlation with plant height, number of bolls per plant, number of sympodial branches per plant, GOT, staple length and fiber strength. Staple length and fiber strength were negatively linked with each other. Estimates of heritability were high for all of the traits except the number of sympodial branches per plant and boll weight.ConclusionThe parent IUB-222 was found to be the best for plant height, the number of bolls per plant, boll weight, GOT, seed cotton yield, and seed index. The genotypes namely, NIAB-414 and VH-367 were identified as the best parents for fiber length, strength, and fineness. Among the crosses NIAB-414 × IUB-222 was the best for the number of bolls per plant, seed index, seed cotton yield and fiber fineness, whereas, the cross of NIAB-414 × CIM-632 was good for plant height. The combination of A555 × CIM-632 was the best for the number of sympodial branches per plant, boll weight, fiber length, and strength, and VH-367 × CIM-632 proved the best for GOT.
Highlights
Cotton is known as white gold due to its white and soft fiber, called vegetable fiber
Correlation coefficient analysis Correlation coefficient analysis measures the relationship between various plant characters
The number of bolls per plant showed a positive and significant association with plant height, the number of sympodial branches per plant, boll weight, seed index, seed cotton yield, and fiber strength, repectively, whereas a negative correlation was observed for fiber length
Summary
Cotton is known as white gold due to its white and soft fiber, called vegetable fiber. Number of bolls per plant, boll weight, sympodial branches per plant, and GOT exhibited positive linkage with the yield of seed cotton per plant. High heritability and positive correlation were reported for monopodia per plant, the number of bolls per plant, yield of seed cotton, and fiber fineness (Khokhar et al 2017; Komala et al 2018). Positive correlation and high heritability were observed for plant height, sympodial branches, the number of bolls, boll weight, seed cotton yield, and fiber fineness. The two-years research was conducted to estimate heritability and association among various yield contributing parameters of cotton, i.e., plant height, number of bolls per plant, number of sympodial branches per plant, seed cotton yield, boll weight, seed index, ginning outturn (GOT), fiber length, fiber strength, and fiber fineness
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