Journal of Integrative Agriculture ›› 2025, Vol. 24 ›› Issue (2): 467-479.DOI: 10.1016/j.jia.2024.02.023

• • 上一篇    下一篇

陆地棉背景毛棉染色体片段代换系纤维及种子相关性状QTL定位

  

  • 收稿日期:2023-12-04 接受日期:2024-01-23 出版日期:2025-02-20 发布日期:2025-01-21

Mapping QTLs for fiber- and seed-related traits in Gossypium tomentosum CSSLs with a G. hirsutum background 

Yongshui Hao, Xueying Liu, Qianqian Wang, Shuxin Wang, Qingqing Li, Yaqing Wang, Zhongni Guo, Tiantian Wu, Qing Yang, Yuting Bai, Yuru Cui, Peng Yang, Wenwen Wang, Zhonghua Teng, Dexin Liu, Kai Guo, Dajun Liu, Jian Zhang#, Zhengsheng Zhang#   

  1. Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400715, China

  • Received:2023-12-04 Accepted:2024-01-23 Online:2025-02-20 Published:2025-01-21
  • About author:Yongshui Hao, E-mail: yshao95@163.com; #Correspondence Jian Zhang, E-mail: zhangjianswau@126.com; Zhengsheng Zhang, Tel: +86-23-68250453, E-mail: zhangzs@swu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (32172064).

摘要: 将野生种固有的遗传多样性引入到栽培品种已成为作物遗传育种和遗传资源研究的热点之一。棉花纤维和种子相关的性状,对全球经济和人民生计至关重要,在棉花育种中占据着重要地位。本研究利用野生棉种毛棉对栽培种陆地棉进行遗传基础改良,并对纤维和种子相关性状进行QTL定位。以陆地棉为背景,构建了含有559单株的染色体片段代换系的群体。分别定位到72个产量性状QTL,89个纤维品质性状QTL76个棉籽营养品质性状QTL104QTL的有利等位基因来源于毛棉。共定位到64稳定QTL,并进一步对其中3QTL进行候选基因鉴定。本研究的结果有助于进一步研究这些经济性状形态发生的遗传基础,并表明毛棉在改善陆地棉纤维和种子相关性状方面具有巨大的育种潜力。

Abstract:

Introducing the inherent genetic diversity of wild species into cultivars has become one of the hot topics in crop genetic breeding and genetic resource research.  Fiber- and seed-related traits, which are critical to the global economy and people’s livelihoods, are the principal focus of cotton breeding.  Here, the wild cotton species Gossypium tomentosum was used to broaden the genetic basis of Ghirsutum and identify QTLs for fiber- and seed-related traits.  A population of 559 chromosome segment substitution lines (CSSLs) was established with various chromosome segments from Gtomentosum in a Ghirsutum cultivar background.  Totals of 72, 89, and 76 QTLs were identified for three yield traits, five fiber quality traits, and six cottonseed nutrient quality traits, respectively.  Favorable alleles of 104 QTLs were contributed by Gtomentosum.  Sixty-four QTLs were identified in two or more environments, and candidate genes for three of them were further identified.  The results of this study contribute to further studies on the genetic basis of the morphogenesis of these economic traits, and indicate the great breeding potential of Gtomentosum for improving the fiber- and seed-related traits in Ghirsutum.

Key words: Gossypium tomentosum ,  chromosome segment substitution lines ,  yield ,  fiber quality ,  cottonseed nutrient quality