Heritability and correlation analysis of morphological and yield traits in genetically modified cotton
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(2020) 3:23
Journal of Cotton Research
RESEARCH
Open Access
Heritability and correlation analysis of morphological and yield traits in genetically modified cotton REHMAN Abdul1,2, MUSTAFA Nida3, DU Xiongming1,2 and AZHAR Muhammad Tehseen3,4*
Abstract Background: Cotton 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. Results: Association 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. Conclusion: The 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. Keywords: Genetic correlation, Genetic variability, Inheritance, Productivity, Upland cotton
Introduction Cotton is also known as white gold due to its white and soft fiber, also called vegetable fiber. The cotton plant was grown like a shrub in nature and its fiber is pure cellulose. The cotton fiber is used to spin into yarn which is further used for making socks, curtains, and towels, etc. Its fiber also consumed in textile industry for cloth making (Stewart and Rossi 2010). A significant amount of oil (16%~27%) is extracted from cotton seed * Correspondence: [email protected] 3 Department of Plant Breeding and Genetics, University of Agriculture Faisalabad, Faisalabad 38040, Pakistan 4 School of Agriculture Sciences, Zhengzhou University, Zhengzhou 450001, China Full list of author information is available at the end of the article
and seed cake is used in the livestock industry. The oil extracted from cotton seed is used as vegetable oil for making fries etc. because the taste of cottonseed oil is similar to coconut oil. In addition, it is an important source of vitamins, fat, and antioxidants (Dowd et al. 2010). During the 2018–2019 survey, cotton was c
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