生物技术通报 ›› 2023, Vol. 39 ›› Issue (2): 70-79.doi: 10.13560/j.cnki.biotech.bull.1985.2022-0579

• 技术与方法 • 上一篇    下一篇

基于SLAF标记的大豆遗传图谱构建及苗期耐盐性QTL定位

陈奕博1(), 杨万明2, 岳爱琴1, 王利祥1, 杜维俊1(), 王敏1()   

  1. 1.山西农业大学农学院,太谷 030801
    2.晋中学院生物科学与技术学院,榆次 030619
  • 收稿日期:2022-05-10 出版日期:2023-02-26 发布日期:2023-03-07
  • 作者简介:陈奕博,男,硕士研究生,研究方向:大豆遗传育种与种质创新;E-mail: 18993466090@163.com
  • 基金资助:
    山西农业大学省部共建有机旱作农业国家重点实验室自主研发项目(202105D121008-3-8);山西省自然科学基金项目(201901D111304);山西省自然科学基金项目(202103021224128);山西农业大学育种工程项目(YZGC096);山西农业大学农学院育种工程重点培育专项(YZ2021-05)

Construction of Soybean Genetic Map Based on SLAF Markers and QTL Mapping Analysis of Salt Tolerance at Seedling Stage

CHEN Yi-bo1(), YANG Wan-ming2, YUE Ai-qin1, WANG Li-xiang1, DU Wei-jun1(), WANG Min1()   

  1. 1. College of Agriculture, Shanxi Agricultural University, Taigu 030801
    2. Department of Biological Science and Technology, Jinzhong University, Yuci 030619
  • Received:2022-05-10 Published:2023-02-26 Online:2023-03-07

摘要:

通过连续2年对大豆苗期耐盐性状进行QTL定位,为大豆苗期耐盐性状提供新的基因位点,为深入了解控制大豆耐盐性的遗传效应及其在染色体上的位置提供依据。以栽培大豆品种晋大53为母本、野生大豆品种平南为父本杂交衍生的重组自交系群体(RIL)为材料,在大豆苗期,盐处理后以致死浓度(PDC)作为耐盐指标,结合基于SLAF标记构建的大豆遗传图谱,采用复合区间作图法检测大豆苗期耐盐性状的QTL位点。结果表明,2年不同环境下共检测到12个QTL位点,分布于第2、3、5、7、9、11、13、15、18和20染色体,遗传变异解释率为23.24%-38.28%。其中,有2个QTL位点分布于第3染色体,2个QTL位点分布于第7染色体,其余8个QTL位点各自分布于不同染色体区段。12个QTL中有5个QTL与前人研究结果一致,其余7个QTL位点为本研究大豆苗期耐盐的新发现。

关键词: 大豆, 苗期, 耐盐性, 重组自交系群体, QTL

Abstract:

QTL mapping of salt tolerance traits in soybean seedling stage was carried out for two consecutive years to provide new gene loci for salt tolerance traits in soybean seedling stage, and to provide basis for in-depth understanding of genetic effects controlling salt tolerance and its location on chromosomes. The recombinant inbred line population(RIL)derived from the crossing of cultivated soybean variety Jinda 53 as female parent and wild soybean variety Pingnan as male parent was used as materials. At the seedling stage of soybean, the plant death concentration(PDC)was used as salt tolerance index after salt treatment, combined with the soybean genetic map constructed based on SLAF markers, the QTL loci of salt tolerance traits in soybean seedlings were detected by composite interval mapping method. The results showed that a total of 12 QTL loci were detected in different environments in two years, which were distributed on chromosome 2, 3, 5, 7, 9, 11, 13, 15, 18 and 20. The interpretation rate of genetic variation was 23.24%-38.28%. Among them, 2 QTL loci were distributed on chromosome 3, 2 QTL loci were distributed on chromosome 7, and the other 8 QTL loci were distributed in different chromosome segments. Among the 12 QTLs, 5 were consistent with the results of previous studies, and the remaining 7 QTL loci were new findings of salt tolerance in soybean seedlings.

Key words: soybean, seedling stage, salt tolerance, recombinant inbred line, QTL