中国农业科学 ›› 2026, Vol. 59 ›› Issue (13): 2789-2801.doi: 10.3864/j.issn.0578-1752.2026.13.003

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

绿豆籽粒蛋白质与苏氨酸含量全基因组关联分析及KASP分子标记开发

陈圣琦1(), 刘金洋2(), 黄佳丽3, 刘肖岑3, 赵硕谦4, 林云2, 薛晨晨2, 闫强2, 陈景斌2, 吴然然2, 陈新2,3(), 程金平1(), 袁星星2,3()   

  1. 1 南京农业大学农学院, 南京 210095
    2 江苏农业科学院经济作物研究所/江苏省园艺作物遗传改良与高效利用重点实验室, 南京 210014
    3 南京农业大学生命科学学院, 南京 210095
    4 南京农业大学植物保护学院, 南京 210095
  • 收稿日期:2025-11-19 接受日期:2026-01-13 出版日期:2026-07-01 发布日期:2026-07-01
  • 通信作者:
    陈新,E-mail:
    程金平,E-mail:
    袁星星,E-mail:
  • 联系方式: 陈圣琦,E-mail:2023801189@stu.njau.edu.cn。刘金洋,E-mail:20200024@jaas.ac.cn。陈圣琦和刘金洋为同等贡献作者。
  • 基金资助:
    国家自然科学基金(32200499); 国家重点研发计划(2023YFD1202702-3); 国家食用豆产业技术体系生物防治与综合防控岗位科学家(CARS-08-G15); 江苏省种业揭榜挂帅项目(JBGS〔2021〕004)

Whole Genome Association Study of Protein and Threonine Content in Mung Bean Seeds and Development of KASP Molecular Marker

CHEN ShengQi1(), LIU JinYang2(), HUANG JiaLi3, LIU XiaoCen3, ZHAO ShuoQian4, LIN Yun2, XUE ChenChen2, YAN Qiang2, CHEN JingBin2, WU RanRan2, CHEN Xin2,3(), CHENG JinPing1(), YUAN XingXing2,3()   

  1. 1 College of Agriculture, Nanjing Agricultural University, Nanjing 210095
    2 Institute of Economic Crops, Jiangsu Academy of Agricultural Sciences/Key Laboratory of Genetic Improvement of Efficient Horticultural Crops, Nanjing 210014
    3 College of Life Sciences, Nanjing Agricultural University, Nanjing 210095
    4 College of Plant Protection, Nanjing Agricultural University, Nanjing 210095
  • Received:2025-11-19 Accepted:2026-01-13 Published:2026-07-01 Online:2026-07-01

摘要:

【目的】蛋白质与苏氨酸是绿豆籽粒的核心营养成分,对绿豆营养品质具有关键影响。绿豆蛋白因易消化吸收、生物活性丰富,是素食者的优质蛋白来源,对人体健康极具价值。挖掘与绿豆籽粒蛋白质含量和苏氨酸相对含量性状显著关联的遗传位点及候选基因,为绿豆籽粒蛋白质和苏氨酸含量性状的遗传改良提供理论依据。【方法】利用凯氏定氮法和液相色谱-质谱联用技术,对2022年种植的279份绿豆品种籽粒的蛋白质含量和苏氨酸相对含量进行测定,利用Tassel5软件的一般线性模型进行全基因组关联分析,挖掘绿豆籽粒蛋白质含量和苏氨酸相对含量相关的遗传位点。结合连锁不平衡分析、转录组比较分析和比较基因组学鉴定到与氮代谢相关的关键候选基因。【结果】鉴定出位于第3染色体939 296—1 039 749 bp区域内的6个关键位点,可解释6.06%—12.20%的表型变异。这6个位点之间紧密连锁,主要可以被分成2种单倍型,其中,Hap2为优势单倍型。然后对关键候选位点SLG03_966208(A/G)设计KASP分子标记,可将80份绿豆品种成功分成AA、GG和AG 3种基因型,准确率达87.5%。在位点连锁区域内鉴定到关键候选基因EVM0000757,其拟南芥同源基因AT5G65750与氮代谢显著相关,在高低蛋白品种中,EVM0000757表达差异显著(P=1.84E-03,|log2FC|=1.39),是可靠候选基因。【结论】鉴定了279份绿豆品种的籽粒蛋白质含量和苏氨酸相对含量。检测到位于第3染色体939 296—1 039 749 bp区域内的6个SNP位点,开发了SLG03_966208(A/G)位点的KASP分子标记,可以区分绿豆籽粒蛋白质和苏氨酸含量的高低。鉴定到与氮代谢相关的关键候选基因EVM0000757

关键词: 绿豆, 籽粒蛋白质含量, 籽粒苏氨酸相对含量, 全基因组关联分析, KASP标记

Abstract:

【Objective】Protein and threonine are the core nutrients of mung bean seeds, which have a critical impact on the nutritional quality of mung beans. Among them, mung bean protein is a high-quality protein source for vegetarians due to its easy digestion, absorption, and rich biological activity, which is of great value to human health. This study aims to explore genetic loci and candidate genes significantly associated with the protein content and relative content of threonine in mung bean seeds, providing a theoretical basis for genetic improvement of protein and threonine content in mung bean seeds. 【Method】This study used Kjeldahl nitrogen determination method and liquid chromatography-mass spectrometry to determine the protein content and relative content of threonine in 279 mung bean varieties planted in 2022. The general linear model of Tassel5 software was used for genome-wide association study to explore genetic loci related to protein content and relative content of threonine in mung bean seeds. By combining linkage disequilibrium analysis, transcriptome comparative analysis, and comparative genomics, key candidate genes related to nitrogen metabolism were identified. 【Result】Six key loci located on chromosome 3 were identified, which are related to the protein content and relative content of threonine in mung bean seeds, and can explain 6.06% to 12.20% of phenotypic variation. These 6 loci are closely linked and can be mainly divided into two haplotypes, with Hap2 being the dominant haplotype. Then, KASP molecular marker was designed for the key candidate locus SLG03_966208 (A/G), which can successfully classify 80 mung bean varieties into three genotypes: AA, GG, and AG, with a detection accuracy rate of 87.5%. The key candidate gene EVM0000757 was identified within the locus linkage region, and the homologous gene AT5G65750 in Arabidopsis was significantly associated with nitrogen metabolism. Its gene expression was significantly different between high and low protein varieties (P=1.84E-03, |log2FC|=1.39), making it a reliable candidate gene.【Conclusion】279 mung bean varieties were identified for their grain protein content and relative content of threonine. Six SNP loci were detected within the 939 296-1 039 749 bp region of chromosome 3. A KASP molecular marker for the SLG03_966208 (A/G) locus was developed, which can distinguish the high and low levels of protein and threonine content in mung bean grains. A key candidate gene related to nitrogen metabolism, EVM0000757, was identified.

Key words: mung bean, grain protein content, relative content of grain threonine content, genome-wide association study, KASP marker