2016—2020年西北部分地区马铃薯致病疫霉交配型分析  

Mating Type Analysis of Potato Late Blight Disease in Some Areas of Northwestern China from 2016 to 2020

作　　者：王立[1,2] 惠娜娜 李培玲[1,2] 郑果 李继平 WANG Li;HUI Nana;LI Peiling;ZHENG Guo;LI Jiping(Institute of Plant Protection,Gansu Academy of Agricultural Sciences,Lanzhou Gansu 730070,China;Scientific Observing and Experiment Station of Crop Pests in Tianshui,the Ministry of Agriculture and Rural Affairs,Gangu Gansu 741299,China)

机构地区：[1]甘肃省农业科学院植物保护研究所,甘肃兰州730070 [2]农业部天水作物有害生物科学观测试验站,甘肃甘谷741299

出　　处：《甘肃农业科技》2022年第7期55-59,共5页Gansu Agricultural Science and Technology

基　　金：国家自然科学基金(31560487);甘肃省重点研发计划(18YF1NA095);甘肃省科技计划项目(20CX9NA091);甘肃省农业科学院科研条件建设及成果转化项目(2019GAAS23)。

摘　　要：为合理选用抗性品种防治马铃薯晚疫病,采用对峙培养的方法对2016—2020年分离自甘肃、青海和宁夏等3省(区)25个县(区)的694株马铃薯致病疫霉[Phytophthora infestans(Mont.)de Bary]进行了交配型测定。结果供试菌株中只检测到了A1交配型和A2交配型,未发现A1A2和SF(自育型),其中A2交配型菌株为优势菌株,2016—2020年占所测菌株的比例分别为86.4%、96.3%、86.4%、80.9%、96.5%。5年间A2交配型菌株占比呈先升后降再升趋势。A2交配型比例的增大给马铃薯晚疫病的防控和抗病育种带来新的挑战。To select resistant varieties suitable for the control of potato late blight.From 2016 to 2020,the mating types of 694 Phytophthora infestans(Mont)de Bary isolated from 25 counties of 3 provinces(regions)including Gansu,Qinghai and Ningxia were determined by the method of confrontation culture.A1 and A2 mating types were the only two types detected,A1A2 and SF(self-fertile)types were not found.A2 mating type was the dominant one,the percentages of A2 mating type found in the samples each year from 2016 to 2020 were 86.4%,96.3%,86.4%,80.9%and 96.5%,respectively,the percentage of A2 mating strains increased first,then decreased,and then increased in 5 years.The increase of mating type A2 has brought new challenges to the control and breeding of potatosresistant to late blight.

关 键 词：马铃薯 致病疫霉 交配型 

分 类 号：S435.32[农业科学—农业昆虫与害虫防治]