黑龙江省大豆疫霉根腐病生理小种鉴定结果

THE IDENTIFICATION OF PHYSIOLOGICAL RACES OF PHYTOPHTHORA MEGASPERMA

用美国大豆疫霉病菌生理小种鉴别寄主(Harosoy、Harosoy63、Sanga、Mack、PI103091、Kingwa、PI171442、Aitona)对采自黑龙江省六个大豆生态区的120份(已纯化40份)疫霉病菌标样进行鉴定。共鉴定出7个生理小种,即生理小种1号、3号、9号、11号、17号、21号、24号;其中1号生理小种出现频率为60%,3号、11号、17号为15%,9号、21号、24号为5%。

By using American soybean hosts （Harosoy, Harosoy63, Sanga, Mack, PI171142, Aitona） of Physiological Races of phytophthora megasperma, 120 strains were identlfled,whlch came from six soybean eco-regions of Heilongjiang Province. Among them 40strains had been purified. The results showed 7 races were identified, they were race-1, race-3, race-9, race-11, race-17, race-21, race -24. The distribution frequency of race-1 was 60%, of race-3, race-11 and race-17 together were 15%, and of race-9, race-21 and race-24 together were 5%.