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中国农学通报 ›› 2023, Vol. 39 ›› Issue (12): 123-130.doi: 10.11924/j.issn.1000-6850.casb2022-0399

• 植物保护·农药 • 上一篇    下一篇

云南不同稻区稻瘟病菌群体遗传结构的SSR分析

刘树芳1(), 张先闻1,2, 董丽英1, 刘沛1, 田维逵3, 周伍民1,2, 杨勤忠1()   

  1. 1 云南省农业科学院农业环境资源研究所/云南省农业跨境有害生物绿色防控重点实验室,昆明 650205
    2 云南大学农学院,昆明 650091
    3 勐海县植保植检与土壤肥料工作站,云南景洪 666200
  • 收稿日期:2022-05-18 修回日期:2022-06-30 出版日期:2023-04-25 发布日期:2023-04-21
  • 通讯作者: 杨勤忠,男,1970年出生,云南晋宁人,研究员,博士,研究方向:作物抗病遗传与病害防控。通信地址:650205 昆明市北京路2238号,Tel:0871-65892205,E-mail:qzhyang@163.com
  • 作者简介:

    刘树芳,男,1981年出生,云南大理人,副研究员,硕士,研究方向:作物病害防控。通信地址:650205 昆明市北京路2238号,Tel:0871-65892205,E-mail:

  • 基金资助:
    云南省农业联合专项“大湄公河次区域水稻稻瘟病菌群体致病性分析”(202101BD070001-067); 云南省重大科技专项计划“农业跨境病虫害绿色防控技术研究与推广应用”(202102AE090003); 国家自然科学基金项目“非洲栽培稻抗稻瘟病新基因Pi67(t)的克隆”(31860524); 国家自然科学基金项目“稻瘟病菌无毒基因AvrPiz-t在大湄公河次区域的变异及进化机制”(31560493)

SSR Analysis of Population Genetic Structure of Magnaporthe oryzae from Different Rice-growing Regions in Yunnan

LIU Shufang1(), ZHANG Xianwen1,2, DONG Liying1, LIU Pei1, TIAN Weikui3, ZHOU Wumin1,2, YANG Qinzhong1()   

  1. 1 Institute of Agricultural Environment Resource Research, Yunnan Academy of Agricultural Sciences/Key Laboratory of Green Prevention and Control of Agricultural Transboundary Pest of Yunnan Province, Kunming 650205
    2 School of Agriculture, Yunnan University, Kunming 650091
    3 Plant Protection and Quarantine & Soil Fertilizer Workstation of Menghai County, Jinghong, Yunnan 666200
  • Received:2022-05-18 Revised:2022-06-30 Online:2023-04-25 Published:2023-04-21

摘要:

为了解稻瘟病菌的群体遗传结构,选用13对SSR标记对2007—2013年分离自云南省陆稻区、籼稻区和粳稻区(共计13个州)的125个稻瘟病菌单孢菌株的全基因组DNA进行PCR扩增及分析,结果13对引物共检测出128个等位基因;聚类分析表明,在相似系数为0.57时,125个供试菌株可划分为29个遗传宗谱,优势宗谱YN02包含了39个菌株,占总菌株数的31.20%,次优势宗谱YN08包含了15个菌株,占总菌株数的12.00%,其余71个菌株分属27个宗谱;表明云南省既有优势宗谱,又有较多遗传多样性的小宗谱,菌株群体遗传多样性丰富;比较不同稻区菌株群体的宗谱频率发现,陆稻区菌株的宗谱频率为65.52%,粳稻区和籼稻区菌株的宗谱频率分别为27.59%和13.79%,表明陆稻区菌株群体的遗传结构比粳稻区、籼稻区菌株复杂。因此,针对菌株群体宗谱较少,且优势宗谱突出的地方,应加强品种多样化种植,有利于稻瘟病菌群体的稳定化选择,降低病害流行风险。

关键词: 水稻, 稻瘟病菌, SSR标记, 遗传结构, 宗谱

Abstract:

In order to understand the population genetic structure of Magnaporthe oryzae, total genomic DNA of 125 strains of M. oryzae collected from upland rice, indica paddy rice and japonica paddy rice growing regions in 13 prefectures of Yunnan Province during 2007-2013 was amplified and analyzed by PCR with thirteen SSR markers. A total of 128 alleles were detected by 13 pairs of primers. Cluster analysis showed that the 125 tested strains could be divided into 29 genetic genealogies when the similarity coefficient was 0.57. The dominant genealogy YN02 contained 39 strains, accounting for 31.20% of total strains, the secondary dominant genealogy YN08 contained 15 strains, accounting for 12.00% of the total strains, and the other 71 strains belonged to 27 genealogies. The results showed that there were both dominant genealogy and small genealogy with more genetic diversity in Yunnan, indicating rich genetic diversity of M. oryzae population. Comparison of the genealogical frequencies of the strains from different rice growing regions showed that the genealogical frequencies of strains from upland rice, japonica rice and indica rice growing regions were 65.52%, 27.59% and 13.79%, respectively, indicating that the genetic structure of the strains in upland rice growing region was more complex than that in japonica and indica rice growing regions. Therefore, diversified rice varieties should be planted in the regions where there are few genealogies and dominant genealogies, and this practice is conducive to the stabilizing selection of rice blast population and reducing the risk of disease epidemic.

Key words: Oryza sativa L., Magnaporthe oryzae, SSR markers, genetic structure, genealogy