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利用40个鉴别寄主对河南省5个小麦产区的44个单孢子堆纯化分离的小麦白粉病菌进行毒性鉴定分析,并采用多基因家系法进行了遗传多样性分析。结果显示,供试群体对Pm8、Pm1、Pm3a、Pm3b、Pm3c、Pm3f、Pm3e、Pm5、Pm6、Pm7、Pm17、Pm19、Pm34等抗病基因的毒性频率分别达到90%以上,已不能再作为抗源利用;对Pm12、Pm16、Pm21、Pm18、Pm2、Pm2+6、Pm2+MLD、Pm5(Mli)、Pm23、Pm30、Pm4a等基因的毒性频率低于15%,仍可以在抗病育种中加以利用;河南省的小麦白粉病菌存在地理之间的差异,同时病菌在地区之间有自西南向东北/东方向的传播。表明省内群体中存在着丰富的遗传多样性。
Forty-four isolates of wheat powdery mildew purified from the five wheat producing areas in Henan Province were identified by using 40 differential hosts and their genetic diversity was analyzed by using the multi-gene pedigree method. The results showed that the virulence frequencies of the tested populations were more than 90% for resistance genes such as Pm8, Pm1, Pm3a, Pm3b, Pm3c, Pm3f, Pm3e, Pm5, Pm6, Pm7, Pm17, Pm19 and Pm34, Source utilization; the frequency of virulence to genes such as Pm12, Pm16, Pm21, Pm18, Pm2, Pm2 + 6, Pm2 + MLD, Pm5 (Mli), Pm23, Pm30, Pm4a is less than 15% Use; Henan Province, there are geographical differences in powdery mildew, while bacteria in the region from southwest to northeast / east direction of transmission. That there is a wealth of genetic diversity among the province’s population.