Journal of Integrative Agriculture ›› 2024, Vol. 23 ›› Issue (10): 3250-3263.DOI: 10.1016/j.jia.2023.07.030

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陆地棉多水平纤维品质性状多效性位点的遗传解析和起源分析

  

  • 收稿日期:2023-05-06 接受日期:2023-07-04 出版日期:2024-10-20 发布日期:2024-09-09

Genetic dissection and origin of pleiotropic loci underlying multi-level fiber quality traits in upland cotton (Gossypium hirsutum L.)

Hongge Li1, 2*, Shurong Tang2*, Zhen Peng1, 2*, Guoyong Fu2, Yinhua Jia2, Shoujun Wei2, Baojun Chen2, Muhammad Shahid Iqbal2, Shoupu He1, 2#, Xiongming Du1, 2#   

  1. 1 Zhengzhou Research Base, State Key Laboratory of Cotton Bio-breeding and Integrated Utilization/School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China
    2 State Key Laboratory of Cotton Bio-breeding and Integrated Utilization/Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China
  • Received:2023-05-06 Accepted:2023-07-04 Online:2024-10-20 Published:2024-09-09
  • About author:Hongge Li, Tel: +86-372-2562252, E-mail: lihongge@caas.cn; #Correspondence Xiongming Du, Tel: +86-372-2562252, E-mail: dujeffrey8848@hotmail.com; Shoupu He, Tel: +86-372-2565353, E-mail: heshoupu@caas.cn * These authors contributed equally to this study. * These authors contributed equally to this work.
  • Supported by:
    The authors appreciate the National Mid-term Gene Bank for Cotton at the Institute of Cotton Research, Chinese Academy of Agricultural Sciences for providing the cotton germplasm seeds.  This work was supported by the National Key Research and Development Program of China (2022YFD1200300), the Central Plain Scholar Program, China (234000510004) and the National Supercomputing Center in Zhengzhou, China.

摘要:

棉花纤维品质决定着种植效益和棉纺织品的质量,因此受到人们的持续关注。 然而,纤维品质检测仪器的局限性阻碍了对一些重要纤维特性(如纤维成熟度、细度和棉结)的准确评价,进而影响了对棉花纤维的遗传改良和工业化利用。本研究使用高级纤维信息系统仪(AFIS)对383个陆地棉 (Gossypium hirsutum L.) 品种的12个单纤维品质性状进行了检测 此外,还通过高容量仪器 (HVI) 检测了8种传统纤维品质性状。为了发掘纤维品质性状优异位点及其候选基因,我们相继开展了全基因组关联研究(GWAS)、连锁不平衡(LD)区块基因分型和功能鉴定。结果显示,控制纤维长度相关性状的多效性位点FL_D11在本研究中再次被鉴定到。更重要的是,基于AFIS性状我们鉴定到了调节纤维成熟度、细度和棉结的三个新的多效性位点(FM_A03FF_A05FN_A07)。联合 RNA-seq和qRT-PCR 分析,我们筛选出多个纤维品质候选基因,包括已经报道的纤维长度基因GhKRP6、新鉴定的成熟度候选基因GhMAP8 和细度候选基因GhDFR。多效性位点的起源和进化分析表明,随着育种时期的临近,FL_D11FM_A03FF_A05的选择压力将增大,而FM_A03FF_A05可能来源于棉花地方品种。本文研究结果不仅揭示了纤维品质的遗传基础,而且为陆地棉纤维品质的遗传改良和纺织利用提供了新的视角。

Abstract:

Cotton fiber quality is a persistent concern that determines planting benefits and the quality of finished textile products.  However, the limitations of measurement instruments have hindered the accurate evaluation of some important fiber characteristics such as fiber maturity, fineness, and neps, which in turn has impeded the genetic improvement and industrial utilization of cotton fiber.  Here, 12 single fiber quality traits were measured using Advanced Fiber Information System (AFIS) equipment among 383 accessions of upland cotton (Gossypium hirsutum L.).  In addition, eight conventional fiber quality traits were assessed by the High Volume Instrument (HVI) System.  Genome-wide association study (GWAS), linkage disequilibrium (LD) block genotyping and functional identification were conducted sequentially to uncover the associated elite loci and candidate genes of fiber quality traits.  As a result, the previously reported pleiotropic locus FL_D11 regulating fiber length-related traits was identified in this study.  More importantly, three novel pleiotropic loci (FM_A03, FF_A05, and FN_A07) regulating fiber maturity, fineness and neps, respectively, were detected based on AFIS traits.  Numerous highly promising candidate genes were screened out by integrating RNA-seq and qRT-PCR analyses, including the reported GhKRP6 for fiber length, the newly identified GhMAP8 for maturity and GhDFR for fineness.  The origin and evolutionary analysis of pleiotropic loci indicated that the selection pressure on FL_D11, FM_A03 and FF_A05 increased as the breeding period approached the present and the origins of FM_A03 and FF_A05 were traced back to cotton landraces.  These findings reveal the genetic basis underlying fiber quality and provide insight into the genetic improvement and textile utilization of fiber in Ghirsutum.


Key words: upland cotton ,  single fiber quality ,  pleiotropic loci ,  candidate genes ,  locus origin