Journal of Integrative Agriculture ›› 2025, Vol. 24 ›› Issue (1): 85-100.DOI: 10.1016/j.jia.2023.08.011

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基于全基因组重测序技术发掘长片段InDels精细定位与大豆籽粒异黄酮含量相关位点qIF05-1

  

  • 收稿日期:2023-05-10 接受日期:2023-07-12 出版日期:2025-01-20 发布日期:2025-01-07

Identification of long InDels through whole genome resequencing to fine map qIF05-1 for seed isoflavone content in soybean (Glycine max L. Merr.) 

Jia Jia1, 2, 3*, Huan Wang1, 2, 3*, Ximeng Yang1, 2, 3, Bo Chen1, 2, 3, Ruqian Wei1, 2, 3, Qibin Ma1, 2, 3, Yanbo Cheng1, 2, 3#, Hai Nian1, 2, 3#   

  1. 1 Key Laboratory of Plant Molecular Breeding of Guangdong Province/College of Agriculture, South China Agricultural University, Guangzhou 510642, China

    2 State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, South China Agricultural University, Guangzhou 510642, China

    3 Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, South China Agricultural University, Guangzhou 510642, China

  • Received:2023-05-10 Accepted:2023-07-12 Online:2025-01-20 Published:2025-01-07
  • About author:#Correspondence Yanbo Cheng, E-mail: ybcheng@scau.edu.cn; Hai Nian, E-mail: hnian@scau.edu.cn * These authors contributed equally to this study.
  • Supported by:

    This work was supported by the China Agriculture Research System of MOF and MARA (CARS-04-PS12), the Research and Development Program in the Key-Areas of Guangdong Province, China (2020B020220008), and the Guangdong Agricultural Research System, China (2023KJ136-03).

摘要:

大豆异黄酮是一种次生代谢物,可为人体提供丰富的营养保健价值。在本实验室前期的研究中,利用一个由华春瓦窑黄豆杂交衍生的一个重组自交系群体,在大豆5号染色体上鉴定到一个控制大豆籽粒异黄酮含量的主效位点qIF05-1。本研究利用Illumina Solexa测序系统对大豆双亲亲本进行了深度的全基因组重测序分析最终在华春2号和瓦窑黄豆基因组间共鉴定出63099个长片段InDel变异(≥15 bp),这些InDels不均匀地分布大豆的20条染色体上,数量12号染色体1826个18号染色体4544个不等。鉴定到10002占总数量15.85%)片段InDel变异位于基因区,其中有1139个大效InDel变异能够导致蛋白质序列截断或从而影响基因的功能为了进一步应用长片段InDels进行大豆的遗传分析,qIF05-1定位区间内检测到68个长InDel变异位点。通过子代重组实验结合基因型分析研究,将qIF051位点的基因组区间缩小到了102.2 kb的基因组区域区间包含12个基因。进一步结合RNA-seq数据分析、基因组序列比较和拟南芥异位表达功能验证,一个bHLH转录因子家族基因Glyma.05G208300简称GmEGL3)被推测为可能是qIF05-1位点的候选基因。综上,通过鉴定和开发长片段InDel标记再一次说明这是一种重要性状精细定位

Abstract:

Soybean seed isoflavones are a type of secondary metabolites that can provide health and nutrition benefits for humans.  In our previous study, a stable quantitative trait locus (QTL) qIF05-1 controlling the seed isoflavone content in soybean was detected on chromosome (Chr.) 05 in a recombinant inbred line (RIL) population from a cross of Huachun 2×Wayao.  In this study, the parental lines were re-sequenced using the Illumina Solexa System with deep coverage.  A total of 63,099 polymorphic long insertions and deletions (InDels) (≥15 bp) were identified between the parents Huachun 2 and Wayao.  The InDels were unevenly distributed on 20 chromosomes of soybean, varying from 1,826 in Chr. 12 to 4,544 in Chr. 18.  A total of 10,002 long InDels (15.85% of total) were located in genic regions, including 1,139 large-effect long InDels which resulted in truncated or elongated protein sequences.  In the qIF05-1 region, 68 long InDels were detected between the two parents.  Using a progeny recombination experiment and genotype analysis, the qIF05-1 locus was mapped into a 102.2 kb genomic region, and this region contained 12 genes.  By RNA-seq data analysis, genome sequence comparison and functional validation through ectopic expression in Arabidopsis thaliana, Glyma.05G208300 (described as GmEGL3), which is a basic helix-loop-helix (bHLH) transcription factor in plants, emerged as the most likely confirmed gene in qIF05-1.  These long InDels can be used as a type of complementary genetic method for QTL fine mapping, and they can facilitate genetic studies and molecular-assisted selection breeding in soybean.

Key words: soybean , seed isoflavone content ,  whole genome re-sequencing ,  long InDels ,  fine map