Association mapping identifies markers related to major early‐maturating traits in upland cotton (<i>Gossypium hirsutum</i> L.)

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  • Cheng‐Qi Li
    School of Life Science and Technology Henan Institute of Science and Technology Key Discipline Open Lab on Crop Molecular Breeding of Henan Institute of Higher Learning/Collaborative Innovation Center of Modern Biological Breeding Xinxiang 453003 Henan Province China
  • Xin‐Juan Xu
    School of Life Science and Technology Henan Institute of Science and Technology Key Discipline Open Lab on Crop Molecular Breeding of Henan Institute of Higher Learning/Collaborative Innovation Center of Modern Biological Breeding Xinxiang 453003 Henan Province China
  • Na Dong
    School of Life Science and Technology Henan Institute of Science and Technology Key Discipline Open Lab on Crop Molecular Breeding of Henan Institute of Higher Learning/Collaborative Innovation Center of Modern Biological Breeding Xinxiang 453003 Henan Province China
  • Ni‐Jiang Ai
    Shihezi Agricultural Science Research Institute Shihezi 832000 China
  • Qing‐Lian Wang
    School of Life Science and Technology Henan Institute of Science and Technology Key Discipline Open Lab on Crop Molecular Breeding of Henan Institute of Higher Learning/Collaborative Innovation Center of Modern Biological Breeding Xinxiang 453003 Henan Province China
  • J. Jenkins
    editor

説明

<jats:title>Abstract</jats:title><jats:p>Association mapping is a promising tool to identify genes for quantitative traits. A total of 172 upland cotton (<jats:italic>Gossypium hirsutum</jats:italic> 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 (<jats:styled-content style="fixed-case">SSR</jats:styled-content>) markers. The gene diversity of the 331 markers averaged 0.40 (range: 0.04–0.78), and the polymorphism information content (<jats:styled-content style="fixed-case">PIC</jats:styled-content>) 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 (<jats:styled-content style="fixed-case">SP</jats:styled-content>), seven for bud period (<jats:styled-content style="fixed-case">BP</jats:styled-content>), six for flower and boll period (<jats:styled-content style="fixed-case">FBP</jats:styled-content>), and 15 for growth period (<jats:styled-content style="fixed-case">GP</jats:styled-content>). These markers were stable and could be used for marker‐assisted selection (<jats:styled-content style="fixed-case">MAS</jats:styled-content>). Favourable alleles for <jats:styled-content style="fixed-case">SP</jats:styled-content>,<jats:styled-content style="fixed-case"> BP</jats:styled-content>,<jats:styled-content style="fixed-case"> FBP</jats:styled-content> and <jats:styled-content style="fixed-case">GP</jats:styled-content> were explored. These alleles can be directly used in <jats:styled-content style="fixed-case">MAS</jats:styled-content> to improve cotton early maturity. This study lays the foundation for analysing the genetic mechanisms underlying early maturity, as well as the use of <jats:styled-content style="fixed-case">MAS</jats:styled-content> to target traits in cotton.</jats:p>

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