生物技术通报

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大豆种皮色泽的QTL定位

李雅迁, 冯龙哲, 孙楠, 张豪, 张艺杰, 杨雅琪, 张欣宇, 岳爱琴, 杜维俊, 王敏()   

  1. 山西农业大学农学院 农业农村部种质创新与分子育种重点实验室(部省共建) 山西省后稷实验室(杂粮生物育种山西实验室),太谷 030801
  • 收稿日期:2026-03-27 出版日期:2026-09-14
  • 通讯作者: 王敏wangmin3502@126.com
  • 基金资助:
    山西省农业关键核心技术攻关子课题(NYGG27-04-01);山西省后稷实验室创新平台项目(202504010920003-2);山西省后稷实验室创新平台项目(2025011406020162);山西省现代农业产业技术体系建设项目(2025CYJSTX05-07)

QTL Mapping for Seed Coat Color in Soybean

LI Ya-qian, FENG Long-zhe, SUN Nan, ZHANG Hao, ZHANG Yi-jie, YANG Ya-qi, ZHANG Xin-yu, YUE Ai-qin, DU Wei-jun, WANG Min()   

  1. College of Agriculture, Shanxi Agricultural University; Key Laboratory of Germplasm Innovation and Molecular Breeding (Co-constructed by the Ministry and the Province), Ministry of Agriculture and Rural Affairs; Shanxi HouJi Laboratory (Shanxi Laboratory for Bio-breeding of Miscellaneous Cereals), Taigu 030801
  • Received:2026-03-27 Published:2026-09-14

摘要:

目的 种皮色泽是大豆重要的品质性状,通过对大豆种皮色泽相关性状进行QTL定位,挖掘相关基因位点,解析种皮色泽遗传效应,筛选关键候选基因,为培育品质优良的大豆品种提供参考依据。 方法 以栽培大豆品种晋大53为母本、野生大豆平南为父本杂交衍生的重组自交系群体(RIL)为材料,以籽粒的色泽度(L*)、红绿值(a*)和蓝黄值(b*)为种皮色泽指标,结合前期SLAF标记构建的遗传图谱,采用复合区间作图法检测QTL,并结合SoyBase数据库和SoyMD数据库筛选候选基因。 结果 共定位10个种皮色泽相关的QTL,获得第8染色体663 kb和第9染色体370 kb 2个候选区段,分别包含11和6个候选基因。经转录组数据表达分析,Glyma.08G103900、Glyma.08G104100、Glyma.09G191200和Glyma.09G191700在籽粒中高表达且与种皮色泽相关,且在晋大53中表达量高于平南,确定为关键候选基因。 结论 在大豆中检测到2个一因多效QTL位点和4个QTL新位点。

关键词: 大豆, 种皮色泽, 重组自交系, QTL, 候选基因

Abstract:

Objective Seed coat color is a key quality trait in soybean. Through QTL mapping for seed coat color-related traits, this study aims to identify associated genetic loci, clarify the genetic effects underlying seed coat color, screen for key candidate genes, and provide a reference for breeding high-quality soybean varieties. Method A recombinant inbred line (RIL) population derived from a cross between cultivated soybean Jinda 53 (female) and wild soybean Pingnan (male) was used. Seed coat color was evaluated using three parameters: lightness (L),red-green value(a*), and blue-yellow value (b*). A genetic map previously constructed with SLAF markers was employed, and QTL analysis was performed using composite interval mapping. Candidate genes were screened against the SoyBase and SoyMD databases. Result Ten QTLs associated with seed coat color were identified. Two candidate regions were obtained: a 663 kb interval on chromosome 8 and a 370 kb interval on chromosome 9, harboring 11 and 6 candidate genes, respectively. Transcriptome analysis revealed that Glyma.08G103900, Glyma.08G104100, Glyma.09G191200, and Glyma.09G191700 were highly expressed in seeds and were associated with seed coat color, showing higher expression levels in Jinda 53 than in Pingnan. These were thus identified as key candidate genes. Conclusion Two pleiotropic QTLs and four novel QTLs were identified in soybean.

Key words: soybean, seed coat color, recombinant inbred line, QTL, candidate gene