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.

S435.32

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)。