title: Identification of QTL for Fiber Quality and Yield Traits Using Two Immortalized Backcross Populations in Upland Cotton.
abstract: Two immortalized backcross populations (DHBCF1s and JMBCF1s) were developed using a recombinant inbred line (RIL) population crossed with the two parents DH962 and Jimian5 (as the males), respectively. The fiber quality and yield component traits of the two backcross populations were phenotyped at four environments (two locations, two years). One hundred seventy-eight quantitative trait loci (QTL) were detected including 76 for fiber qualities and 102 for yield components, explaining 4.08-17.79% of the phenotypic variation (PV). Among the 178 QTL, 22 stable QTL were detected in more than one environment or population. A stable QTL, qFL-c10-1, was detected in the previous F2 population, a RIL population in 3 environments and the current two BCF1 populations in this study, explaining 5.79-37.09% of the PV. Additionally, 117 and 110 main-effect QTL (M-QTL) and 47 and 191 digenic epistatic QTL (E-QTL) were detected in the DHBCF1s and JMBCF1s populations, respectively. The effect of digenic epistasis played a more important role on lint percentage, fiber length and fiber strength. These results obtained in the present study provided more resources to obtain stable QTL, confirming the authenticity and reliability of the QTL for molecular marker-assisted selection breeding and QTL cloning.
authors.affiliation: National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China.|State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAAS, Anyang, Henan, China.
authors.forename: Hantao
authors.initials: H
authors.lastname: Wang
authors.affiliation: National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China.
authors.forename: Cong
authors.initials: C
authors.lastname: Huang
authors.affiliation: National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China.
authors.forename: Wenxia
authors.initials: W
authors.lastname: Zhao
authors.affiliation: National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China.
authors.forename: Baosheng
authors.initials: B
authors.lastname: Dai
authors.affiliation: National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Shen
authors.affiliation: National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China.
authors.forename: Beibei
authors.initials: B
authors.lastname: Zhang
authors.affiliation: Institute of Crop Genetic and Breeding, College of Agriculture, Yangtze University, Jingzhou, Hubei, China.
authors.forename: Dingguo
authors.initials: D
authors.lastname: Li
authors.affiliation: National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, China.
authors.forename: Zhongxu
authors.initials: Z
authors.lastname: Lin
mesh_terms: D002874:Chromosome Mapping / Q000379:methods*; D032561:Cotton Fiber; D003433:Crosses, Genetic; D004843:Epistasis, Genetic; D008040:Genetic Linkage; D005819:Genetic Markers; D005838:Genotype; D003368:Gossypium / Q000033:anatomy & histology / Q000235:genetics*; D010641:Phenotype; D000069600:Plant Breeding; D040641:Quantitative Trait Loci; D019655:Quantitative Trait, Heritable
chemical_list: D005819:Genetic Markers