中国水稻科学 ›› 2024, Vol. 38 ›› Issue (5): 525-534.DOI: 10.16819/j.1001-7216.2024.230811

• 研究报告 • 上一篇    下一篇

水稻中八个稻瘟病抗性基因特异分子标记的开发及应用

杨好1,#, 黄衍焱1,#, 王剑2,3, 易春霖1, 石军4, 谭楮湉1, 任文芮1, 王文明1,*()   

  1. 1四川农业大学 西南作物基因资源发掘与利用国家重点实验室, 成都 611130
    2四川农业大学 农学院, 成都 611130
    3四川省农业科学院 植物保护研究所, 成都 610066
    4绵阳市农业科学研究院/厅市共建作物特色资源创制及应用四川省重点实验室, 四川 绵阳 621023
  • 收稿日期:2023-08-31 修回日期:2023-11-17 出版日期:2024-09-10 发布日期:2024-09-10
  • 通讯作者: *email: j316wenmingwang@163.com
  • 作者简介:#共同第一作者
  • 基金资助:
    国家自然科学基金资助项目(U19A2033);国家自然科学基金资助项目(31901839);四川省青年科技创新研究团队资助项目(2022JDTD0023)

Development and Application of Specific Molecular Markers for Eight Rice Blast Resistance Genes in Rice

YANG Hao1,#, HUANG Yanyan1,#, WANG Jian2,3, YI Chunlin1, SHI Jun4, TAN Chutian1, REN Wenrui1, WANG Wenming1,*()   

  1. 1State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu 611130, China
    2College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
    3Institute of Plant Protection, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China
    4Institute of Rice Research, Mianyang Academy of Agricultural Sciences/Crop Characteristic Resources Creation and Utilization Key Laboratory of Sichuan Province, Mianyang 621023, China
  • Received:2023-08-31 Revised:2023-11-17 Online:2024-09-10 Published:2024-09-10
  • Contact: *email: j316wenmingwang@163.com
  • About author:#These authors contributed equally to the work

摘要:

目的】为了明确水稻亲本的稻瘟病抗性基因组成,并有效地应用于水稻抗性育种,开发不受遗传背景限制的分子标记至关重要。这些分子标记能够精确地识别亲本中的抗性基因,为分子辅助育种提供重要的工具。【方法】发掘抗性基因编码区在155份水稻材料中等位基因的核苷酸多态性位点,在特异性最强位点开发分子标记。【结果】经多重阳性及阴性对照或部分结果的重测序检验,为PitPishPibPid3Pi5PiaPi54Pita2/Ptr等8个抗性基因开发了有效的分子标记,并明确这些抗性基因在109个四川盆地常用育种亲本中的组成。其中,Pia基因不存在于这些亲本中,PitPishPi54Pid3Ptr/Pita2Pi5Pib基因分别存在于3.67%、13.76%、14.68%、18.35%、24.77%、26.61%和38.53%的亲本中。另外,有21.10%的水稻亲本不含这些基因,35.78%的亲本只含有1个抗性基因,43.12%的亲本聚合了2~4个抗性基因。

关键词: 水稻, 稻瘟病, 抗性基因, 分子标记

Abstract:

Objective】To elucidate the composition of blast resistance genes in rice parents and facilitate their effective utilization in rice resistance breeding, it’s crucial to develop molecular markers that transcend genetic background limitations. These molecular markers can accurately discern resistance genes in parents, serving as essential tools for marker-assisted breeding.【Method】By comparing the coding sequence of each Resistance gene with allelic genes in 155 rice resources, nucleotide polymorphism sites within each resistance gene were identified. Primer pairs for molecular markers were then developed targeting the most specific polymorphism sites.【Results】Effective molecular markers were successfully developed for eight resistance genes: Pit, Pish, Pib, Pid3, Pi5, Pia, Pi54, and Pita2/Ptr. These markers were validated through examination using multiple positive and negative controls or gene sequencing. Subsequently, these markers were utilized to identify the resistance gene composition in 109 breeding parent lines commonly used in the Sichuan Basin. Results revealed that the Pia gene was absent in these parent lines, while Pit, Pish, Pi54, Pid3, Ptr/Pita2, Pi5, and Pib genes were present in 3.67%, 13.76%, 14.68%, 18.35%, 24.77%, 26.61%, and 38.53% of lines, respectively. Furthermore, 21.10% of the rice parent lines lacked these resistance genes, 35.78% possessed one resistance gene, and 43.12% harbored two to four resistance genes.

Key words: rice, rice blast disease, resistance genes, molecular markers