Journal of Integrative Agriculture ›› 2025, Vol. 24 ›› Issue (5): 1688-1703.DOI: 10.1016/j.jia.2024.01.016

• • 上一篇    下一篇

陆地棉-雷蒙德氏棉渗入系的培育及其农艺性状的QTL定位

  

  • 收稿日期:2023-08-24 修回日期:2024-01-24 接受日期:2023-12-12 出版日期:2025-05-20 发布日期:2025-04-14

Development of Gossypium hirsutumGossypium raimondii introgression lines and their use in QTL mapping of agricultural traits

Liang Wang1, Nijiang Ai2, Zechang Zhang1, Chenhui Zhou1, Guoli Feng2, Sheng Cai1, Ningshan Wang2, Liuchun Feng1, Yu Chen1, Min Xu1, Yingying Wang1, Haoran Yue1, Mengfei Chen1, Liangshuai Xing1, Baoliang Zhou1#   

  1. 1 Nanjing Agricultural University/State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization/Collaborative Innovation Center for Modern Crop Production Co-sponsored by Jiangsu Province and Ministry of Education/Cotton Germplasm Enhancement and Application Engineering Research Center, Ministry of Education, Nanjing 210095, China

    2 Xinjiang Production and Construction Corps, Shihezi Agricultural Science Research Institute, Shihezi 832000, China

  • Received:2023-08-24 Revised:2024-01-24 Accepted:2023-12-12 Online:2025-05-20 Published:2025-04-14
  • About author:Liang Wang, E-mail: 2020201084@stu.njau.edu.cn; #Correspondence Baoliang Zhou, Tel: +86-25-84396523, Fax: +86-25-84395307, E-mail: baoliangzhou@njau.edu.cn
  • Supported by:
    This study was funded by the National Key Research and Development Program of China (2016YFD0100203 and 2016YFD0102000), the Key Scientific and Technological Projects of the Eighth Division of the Xinjiang Production and Construction Corps (XPCC), China (2024NY01, 2023NY09, 2023NY10), the Key Scientific and Technological Project of XPCC, China (2021AB010), the Postgraduate Research & Practice Innovation Program of Jiangsu Province, China (KYCX22_0748), and the Collaborative Innovation Center for Modern Crop Production co-sponsored by the Jiangsu Province and Ministry of Education, China.

摘要: 雷蒙德氏棉(2n=2x=26,D5)是二倍体野生种,被认为是广为栽培的陆地棉(2n=4x=52, AD1) D染色体亚组的祖先供体种,目前尚未得到有效利用。本研究我们培育了一套陆地棉(受体)-雷蒙德氏棉(供体)渐渗系群体,开展了野生棉优异QTL/基因的挖掘与定位。该群体由256个渐渗系组成,来自供体雷蒙德氏棉基因组的覆盖率52.33%。渐渗片段长度范围为0.03- 19.12 Mb,平均为1.22 Mb,总渐渗片段覆盖长度386.98 Mb。采用全基因组关联分析(Q+K+MLM)和QTL定位(RSTEP-LRT)两种方法,鉴定出59个共同QTL,包括14个稳定QTL和6个共同QTL (co-QTL)簇,以及1个MIC热点。籽指(百粒重)的共同QTL均表现为正加性效应,而单铃重的共同QTL均表现为负加性效应,表明籽指与铃重之间的联系可能被打破。衣分的QTL表现出正效应,有利于提高棉花皮棉产量。大部分与纤维品质有关的QTL具有负加性效应,表明这些QTL在棉花育种中已得以驯化或改良。部分棉纤维品质QTL表现为正加性效应,可能是新的优异QTL,可用于改良棉纤维品质。这些渐渗系的育成将不但有助于分子标记辅助育种,也可通过精细定位QTL,进一步挖掘野生种雷蒙德氏棉的优异基因,为将来设计育种创制棉花新品种提供新基因资源。


Abstract:

Gossypium raimondii (2n=2x=26, D5), an untapped wild species, is the putative progenitor of the D-subgenome of Ghirsutum (2n=4x=52, AD1), an extensively cultivated species.  Here, we developed a Ghirsutum (recipient)–Graimondii (donor) introgression population to exploit the favorable QTLs/genes and mapped potential quantitative trait loci (QTLs) from wild cotton species.  The introgression population consisted of 256 lines with an introgression rate of 52.33% for the Graimondii genome.  The introgression segment length range was 0.03–19.12 Mb, with an average of 1.22 Mb.  The coverage of total introgression fragments from Graimondii was 386.98 Mb.  Further genome-wide association analysis (Q+K+MLM) and QTL mapping (RSTEP-LRT) identified 59 common QTLs, including 14 stable QTLs and six common QTL (co-QTL) clusters, and one hotspot of micronaire (MIC).  The common QTLs for seed index all showed positive additive effects, while the common QTLs for boll weight all had negative additive effects, indicating that the linkage between seed index and boll weight could be broken.  QTLs for lint percentage showed positive effects and could be beneficial for improving cotton yield.  Most QTLs for fiber quality had negative additive effects, implying these QTLs were domesticated/improved in Ghirsutum.  A few fiber quality QTLs showed positive additive effects, so they could be used to improve cotton fiber quality.  The introgression lines developed could be useful for molecular marker-assisted breeding and mapping QTLs precisely for mining desirable genes from the wild species Graimondii.  Such genes can improve cultivated cotton in the future through a design-breeding approach. 

Key words: Gossypium hirsutum ,  Gossypium raimondii ,  introgression lines ,  yield ,  fiber quality ,  quantitative trait locus