title: Heterosis and correlation in interspecific and intraspecific hybrids of cotton.
abstract: 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 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. 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.
authors.affiliation: Department of Plant Breeding and Genetics, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Punjab, Pakistan.
authors.forename: S
authors.initials: S
authors.lastname: Munir
authors.affiliation: Department of Plant Breeding and Genetics, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Punjab, Pakistan.
authors.forename: S B
authors.initials: SB
authors.lastname: Hussain
authors.affiliation: Institute of Molecular Biology and Biotechnology, Bahauddin Zakariya University, Multan, Punjab, Pakistan.
authors.forename: H
authors.initials: H
authors.lastname: Manzoor
authors.affiliation: Department of Plant Breeding and Genetics, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Punjab, Pakistan.
authors.forename: M K
authors.initials: MK
authors.lastname: Quereshi
authors.affiliation: Department of Forestry, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Punjab, Pakistan.
authors.forename: M
authors.initials: M
authors.lastname: Zubair
authors.affiliation: Department of Forestry, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Punjab, Pakistan.
authors.forename: W
authors.initials: W
authors.lastname: Nouman
authors.affiliation: Department of Agronomy, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Punjab, Pakistan.
authors.forename: A N
authors.initials: AN
authors.lastname: Shehzad
authors.affiliation: Institute of Molecular Biology and Biotechnology, Bahauddin Zakariya University, Multan, Punjab, Pakistan.
authors.forename: S
authors.initials: S
authors.lastname: Rasul
authors.affiliation: Department of Forestry, Faculty of Agricultural Sciences and Technology, Bahauddin Zakariya University, Multan, Punjab, Pakistan.
authors.forename: S A
authors.initials: SA
authors.lastname: Manzoor
mesh_terms: D032561:Cotton Fiber / Q000592:standards; D003368:Gossypium / Q000235:genetics*; D006823:Hybrid Vigor; D006824:Hybridization, Genetic; D007178:Inbreeding; D000069600:Plant Breeding; D019655:Quantitative Trait, Heritable; D000068618:Selective Breeding