Association mapping identifies markers related to major early‐maturating traits in upland cotton (Gossypium hirsutum L.) |
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| Authors: | Cheng‐Qi Li Xin‐Juan Xu Na Dong Ni‐Jiang Ai Qing‐Lian Wang |
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| Affiliation: | 1. School of Life Science and Technology, Henan Institute of Science and Technology, Key Discipline Open Lab on Crop Molecular 2. Breeding of Henan Institute of Higher Learning/Collaborative Innovation Center of Modern Biological Breeding, Xinxiang, Henan Province, China;3. Shihezi Agricultural Science Research Institute, Shihezi, China |
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| Abstract: | ![]()
Association mapping is a promising tool to identify genes for quantitative traits. A total of 172 upland cotton (Gossypium hirsutum L.) accessions were assessed. The panel was phenotyped for four major early‐maturating traits across multiple environments and genotyped using 331 polymorphic simple sequence repeat (SSR) markers. The gene diversity of the 331 markers averaged 0.40 (range: 0.04–0.78), and the polymorphism information content (PIC) averaged 0.34 (range: 0.04–0.75). Thirty‐nine significant markers related to early‐maturating traits were simultaneously detected in at least two environments. Among the 39 markers, 11 for seed period (SP), seven for bud period (BP), six for flower and boll period (FBP), and 15 for growth period (GP). These markers were stable and could be used for marker‐assisted selection (MAS). Favourable alleles for SP, BP, FBP and GP were explored. These alleles can be directly used in MAS to improve cotton early maturity. This study lays the foundation for analysing the genetic mechanisms underlying early maturity, as well as the use of MAS to target traits in cotton. |
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| Keywords: | association mapping seed period bud period flower and boll period growth period favourable allele |
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