哈尔滨市马铃薯晚疫病菌生理小种的类型

Physiological Race of Phytophthora infestans on Potato in Harbin

马铃薯晚疫病是由致病疫霉菌[Phytophtora infestans(Mont.)de Bary]引起的毁灭性病害,近年来,该病害在哈尔滨市连年发生,危害日趋严重。本研究对2010年从哈尔滨市采集62个马铃薯晚疫病菌分离物进行了生理小种鉴定。结果表明,在62个分离物中,共有14个小种类型,以1.3.4.7.8.10.11小种为主,出现频率为33.87%,其次是小种1.3.4.7.8.和1.3.4.7,出现频率分别为14.52%和12.90%,没有鉴定出单基因小种。这充分说明,哈尔滨市致病疫霉菌毒力结构呈多样性,具有高度的复合性。

Potato late blight, caused by Phytophtora infestans （Mont.） de Bary, is a catastrophic disease. In recent years, it occurs year after year, and tends to be more and more serious. In this research, 62 isolates, which were collected from Harbin City in 2010, were identified in vitro assay for physiological race of Phytophtora infestans. The results showed that physiological races of Phytophthora infestans in Harbin City were composed of 14 types, with 1.3.4.7.8.10.11 being dominant （33.87%） followed by 1.3.4.7.8 （14.52%） and 1.3.4.7 （12.90%）, and the race with one virulent gene was not detected. These data suggest that the characteristics of Phytophthora infestans populations on potato in Harbin City be diverse and complicated.