欢迎访问《中国农学通报》,

中国农学通报 ›› 2016, Vol. 32 ›› Issue (12): 195-199.doi: 10.11924/j.issn.1000-6850.casb15120077

所属专题: 生物技术 水稻

• 植物保护 农药 • 上一篇    下一篇

稻瘟病菌无毒基因AvrPi9在2个病圃中的动态变化

杨 扬1,褚 晋1,何鹏飞1,2,吴毅歆2,3,易加洪4,何月秋2,3   

  1. (1云南农业大学农业生物多样性应用技术国家工程研究中心,昆明 650201;2微生物菌种筛选与应用国家地方联合工程研究中心,昆明 650217;3云南农业大学农学与生物技术学院,昆明 650201;4昆明市嵩明县阿子营农业技术推广站,昆明 650200)
  • 收稿日期:2015-12-13 修回日期:2016-01-28 接受日期:2016-02-25 出版日期:2016-04-27 发布日期:2016-04-27
  • 通讯作者: 何月秋
  • 基金资助:
    农业部公益性行业(农业)科研专项计划资助项目“粮食作物基因对基因病害的抗病品种布局技术”(201203014)。

Dynamic Change of Avirulence AvrPi9 of Magnaporthe oryzae in Two Rice Blast Nurseries

Yang Yang1, Chu Jin1, He Pengfei1,2, Wu Yixin2,3, Yi Jiahong4, He Yueqiu2,3   

  1. 1National Engineering Center for Applied Techniques of Agricultural Biodiversity, Yunnan Agricultural University, Kunming 650201; 2National and Local Joint Engineering Research Center for Microbial Screening and Application, Kunming 650201; 3Faculty of Agronomy and Biotechnology, YAU, Kunming 650201; 4Aziying Extension Station of Agricultural Technologies of Songming District, Kunming 650200)
  • Received:2015-12-13 Revised:2016-01-28 Accepted:2016-02-25 Online:2016-04-27 Published:2016-04-27

摘要: 为了评估水稻抗稻瘟病基因Pi9在生产上的应用前景,采用接种鉴定和PCR检测分析了2012年至2014年从云南省罗平县和腾冲县2个病圃内感病品种丽江新团黑谷的396个稻瘟病菌单胞菌株的无毒基因AvrPi9动态变化。结果表明:AvrPi9在此两病圃所采集菌株中出现的频率虽均高达90%以上,但有逐年下降的趋势。抗病基因Pi9仍有应用前景,特别是与抗病基因Pi ztPi7Pi12联合应用,联合抗病系数都达0.81以上。然而,在PCR检测到的388个AvrPi9菌株中,21个含有该基因片段,但仍对Pi9基因品系IRBL22有致病性,AvrPi9基因可能正在发生结构变化。

关键词: 类萌发素蛋白, 类萌发素蛋白, 基因表达, 生物胁迫, 非生物胁迫

Abstract: In order to evaluate the application potential of the rice resistance gene Pi9 in practical production, the dynamic changes of avirulence gene AvrPi9 of 396 Magnaporthe oryzae single-spore isolates collected from ‘LTH’ in Luoping County and Tengchong County of Yunnan Province from 2012 to 2014 were analyzed by artificial inoculation and PCR test. The results showed that the AvrPi9 frequency of the isolates reached more than 90% in the three years even with a declining trend, indicating that the resistance gene Pi9 could still be useful in the future, especially combined with the resistance genes Pizt, Pi7 and Pi12, and the resistance association coefficients were all higher than 0.81. However, PCR amplification showed that 388 isolates carried AvrPi9 gene, among them 21 isolates contained the gene fragments but were still pathogenic to ‘IRBL22’ of Pi9 gene line, it implied the structure of AvrPi9 might be changing.