生物技术通报 ›› 2026, Vol. 42 ›› Issue (2): 197-206.doi: 10.13560/j.cnki.biotech.bull.1985.2025-0890

• 研究报告 • 上一篇    下一篇

基于BSA-seq的高粱开花时间基因定位及候选基因预测

王尚封1(), 程斌2,3, 王若若3,4, 丁延庆2,3, 徐建霞2,3, 曹宁2,3, 高旭2,3, 李文贞2,3, 张立异2,3()   

  1. 1.贵州大学农学院,贵阳 550025
    2.贵州省农业科学院旱粮研究所,贵阳 550006
    3.贵州省特色杂粮分子育种重点实验室,贵阳 550006
    4.贵州省农业科学院生物技术研究所,贵阳 550006
  • 收稿日期:2025-08-18 出版日期:2026-02-26 发布日期:2026-03-17
  • 通讯作者: 张立异,女,博士,研究员,研究方向 :作物分子遗传育种;E-mail: lyzhang1997@hotmail.com
  • 作者简介:王尚封,女,硕士研究生,研究方向 :作物分子遗传育种;E-mail: 619684541@qq.com
    第一联系人:(王尚封、程斌并列第一作者)
  • 基金资助:
    贵州省育种科研基础平台创新能力建设(黔科合服企[2022]014);特色杂粮分子育种贵州省重点实验室(黔科合平台ZSYS[2025]026);国家自然科学基金项目(32460493);贵州省基础研究计划(自然科学)面上项目(黔科合基础-zk[2025]面上299),贵州省农业科学院青年科技基金(自然科学)黔农科博士基金([2025]02)

Gene Mapping of Sorghum Flowering Time and Prediction of Candidate Genes Based on BSA-seq

WANG Shang-feng1(), CHENG Bin2,3, WANG Ruo-ruo3,4, DING Yan-qing2,3, XU Jian-xia2,3, CAO Ning2,3, GAO Xu2,3, LI Wen-zhen2,3, ZHANG Li-yi2,3()   

  1. 1.College of Agriculture, Guizhou University, Guiyang 550025
    2.Institute of Upland Food Crops, Guizhou Academy of Agricultural Sciences, Guiyang 550006
    3.Guizhou Key Laboratory of Biology and Breeding for Specialty Crops, Guiyang 550006
    4.Institute of Biotechnology, Guizhou Academy of Agricultural Sciences, Guiyang 550006
  • Received:2025-08-18 Published:2026-02-26 Online:2026-03-17

摘要:

目的 开花时间作为高粱品种选育过程中的关键目标性状之一,对其生态适应性和高产潜力具有重要影响。 方法 以晚开花品种红缨子与早开花品种SAP001杂交构建的F2群体为材料进行开花时间遗传定位分析。 结果 表型调查显示,F2群体中晚花和早花单株的分离比符合3∶1(χ2=0.225,P>0.05),表明该性状受到一对主效基因的控制。通过对极端早花和晚花株系的BSA-Seq分析,在第3染色体59.73‒60.44 Mb区间检测到一个与开花时间显著关联的遗传位点。结合双亲重测序和转录组数据,鉴定到一个编码光系统Ⅱ叶绿素结合蛋白的关键候选基因(SbiHYZ.03G218800)。该基因启动子区存在Myb/SANT、TATA结合蛋白(TBP)结合位点突变,在亲本间表达差异显著,可能为高粱中调控开花时间的新基因。基于该候选区段中的SNP和InDel变异,开发了一个可有效区分早花与晚花植株连锁分子标记。 结论 揭示了中国酒用高粱开花时间的遗传基础,为开展高粱生育期分子育种提供了重要基因资源和分子标记。

关键词: 高粱, 开花时间, BSA-seq, 转录组测序, 候选基因

Abstract:

Objective Flowering time is a key target trait in sorghum breeding, significantly influencing its ecological adaptability and high-yield potential. Method An F₂ population derived from a cross between the late-flowering variety Hongyingzi and the early-flowering variety SAP001 was used for genetic mapping of flowering time. Result Phenotypic investigation revealed that the segregation ratio of late-flowering and early-flowering plants was consistent with 3∶1(χ2=0.225, P>0.05), indicating that the trait was controlled by a pair of major genes. BSA-Seq analysis of extreme early-and late-flowering lines detected a genetic locus significantly associated with flowering time within the 59.73‒60.44 Mb interval on chromosome 3. By integrating whole-genome resequencing of the parents and transcriptome data, a key candidate gene (SbiHYZ.03G218800), encoding a light-harvesting complex Ⅱ chlorophyll-binding protein, was identified as a putative novel regulator of flowering time in sorghum (Sorghum bicolor (L.)Moench). There were mutations in the binding sites of Myb/SANT and TATA-binding protein (TBP) within its promoter region, and the expression of this gene differed significantly between the parents, possibly it was a new gene regulating flowering time of sorghum. Based on SNP and InDel variations in this candidate region, a closely linked molecular marker effectively distinguishing between early- and late-flowering plants was developed. Conclusion This study preliminarily reveals the genetic basis of flowering time in Chinese liquor-brewing sorghum germplasm and provides valuable genetic resources and molecular markers for molecular breeding of sorghum maturity.

Key words: sorghum, flowering time, BSA-seq, transcriptome sequencing, candidate genes