title: Quantitative trait loci mapping and genetic dissection for lint percentage in upland cotton (Gossypium hirsutum).
abstract: Lint percentage is an important character of cotton yield components and it is also correlated with cotton fibre development. In this study, we used a high lint percentage variety, Baimian1, and a low lint percentage, TM-1 genetic standard for Gossypium hirsutum, as parents to construct a mapping populations in upland cotton (G. hirsutum). A quantitative trait locus/loci (QTL) analysis of lint percentage was performed by using two mapping procedures; composite interval mapping (CIM), inclusive composite interval mapping (ICIM) and the F2:3 populations in 2 years. Six main-effect QTL (M-QTL) for lint percentage (four significant and two suggestive) were detected in both years by CIM, and were located on chr. 3, chr. 19, chr. 26 and chr. 5/chr. 19. Of the six QTL, marker intervals and favourable gene sources of the significant M-QTL, qLP-3(2010) and qLP-3(2011) were consistent. These QTL were also detected by ICIM, and therefore, should preferentially be used for markerassisted selection (MAS) of lint percentage. Another M-QTL, qLP-19(2010), was detected by two mapping procedures, and it could also be a candidate for MAS. We detected the interaction between two M-QTL and environment, and 11 epistatic QTL (E-QTL) and their interaction with environment by using ICIM. The study also found two EST-SSRs, NAU1187 and NAU1255, linked to M-QTL for lint percentage that could be candidate markers affecting cotton fibre development.
authors.affiliation: Beijing Key Laboratory of Plant Resources Research and Development, Beijing Technology and Business University, Beijing 100048, People's Republic of China. cottonmol@aliyun.com.
authors.forename: Min
authors.initials: M
authors.lastname: Wang
authors.forename: Chengqi
authors.initials: C
authors.lastname: Li
authors.forename: Qinglian
authors.initials: Q
authors.lastname: Wang
mesh_terms: D032461:Chromosomes, Plant / Q000235:genetics; D032561:Cotton Fiber; D059647:Gene-Environment Interaction; D017343:Genes, Plant; D056726:Genetic Association Studies; D005819:Genetic Markers; D003368:Gossypium / Q000235:genetics* / Q000502:physiology; D008126:Lod Score; D040641:Quantitative Trait Loci
chemical_list: D005819:Genetic Markers