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Heterosis and correlation in interspecific and intraspecific hybrids of cotton

S. Munir, S.B. Hussain, H. Manzoor, M.K. Quereshi, M. Zubair, W. Nouman, A.N. Shehzad, S. Rasul, S.A. Manzoor
2016 Genetics and Molecular Research  
Interspecific and intraspecific hybrids show varying degrees of heterosis for yield and yield components. Yield-component traits have complex genetic relationships with each other. To determine the relationship of yield-component traits and fiber traits with seed cotton yield, six lines (Bt. CIM-599, CIM-573, MNH-786, CIM-554, BH-167, and GIZA-7) and three test lines (MNH-886, V4, and CIM-557) were crossed in a line x tester mating design. Heterosis was observed for seed cotton yield, fiber
more » ... on yield, fiber traits, and for other yield-component traits. Heterosis in interspecific hybrids for seed cotton yield was more prominent than in intraspecific hybrids. The interspecific hybrid Giza-7 x MNH-886 had the highest heterosis (114.77), while among intraspecific hybrids, CIM-554 x CIM-557 had the highest heterosis (61.29) for seed cotton yield. 2 S. Munir et al. ©FUNPEC-RP Genetics and Molecular Research 15 (2): gmr.15028083 A major trait contributing to seed cotton yield was bolls/plant followed by boll weight. Correlation studies revealed that bolls/plant, boll weight, lint weight/boll, lint index, seed index, lint/seed, staple length, and staple strength were significantly and positively associated with seed cotton yield. Selection based on boll weight, boll number, lint weight/boll, and lint index will be helpful for improving cotton seed yield.
doi:10.4238/gmr.15028083 pmid:27420964 fatcat:uiwf5ktzezcgtdkg7mta6lwlwa