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对 1996— 1997年采自河北省马铃薯主产区的 2 8个马铃薯晚疫病菌的菌株在白云豆 -V8蔬菜汁培养基上进行了交配型测定。结果发现 ,在 2 8个菌株中 ,18个菌株为A1交配型 ,占被测总菌株数的 6 4.3% ;10个菌株为A2交配型 ,占被测总菌株数的 35 .7% ,其中 9个菌株采自承德市围场县 ,1个菌株采自张家口市康保县。说明在河北省的 2个马铃薯主产区均存在A2交配型 ,且在同一块田中同时存在A1和A2交配型。同时还发现该病菌单位面积产生卵孢子的数量差异很大 ,为 10～ 2 30 0个·cm-2 。并对藏卵器、雄器、卵孢子的大小、颜色、形态等进行了描述
The strains of 28 Phytophthora infestans collected from the main potato producing areas in Hebei Province during 1996-1997 were assayed on the mating type of Baiyun bean-V8 vegetable juice medium. The results showed that among the 28 strains, 18 strains were A1 mating type, accounting for 6 4.3% of the total tested strains. 10 strains were A2 mating type, accounting for 35.7% of the total strains tested, of which, Nine strains were collected from Weichang County, Chengde City, one strain was collected from Kangbao County, Zhangjiakou City. This indicated that there were A2 mating types in the two main potato producing areas in Hebei Province, and both A1 and A2 mating type existed in the same field. At the same time, it was also found that the number of oospores produced per unit area varied widely from 10 to 230 g · cm-2. The size, color, morphology and so on of the ovipositor, anther and oospore are described