河北省马铃薯晚疫病菌(Phytophthora infestans)A2交配型的分布  

The distribution of the A2 mating type of Phytophthora infestans in potato fields in Hebei province

作　　者：朱杰华[1] 张志铭[1] 李玉琴 田世民[1] 常建霞 

机构地区：[1]河北农业大学植病系,河北保定071001 [2]河北省邯郸市丛台区农业办公室,河北邯郸056002

出　　处：《河北农业大学学报》2000年第3期73-75,共3页Journal of Hebei Agricultural University

基　　金：河北省自然科学基金!(396 0 86 );国际马铃薯中心资助项目!(0 10 10 6 )

摘　　要：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。isolates of Phytophthora infestans collected from late blight potato fields in Weichang county and Kangbao county of Hebei province during 1996—1997 were examined for mating type on Baiyun bean -V8 juice media. The results showed that 10 of 28 isolates were A2 mating type, the frequency of A2 mating type was 35.7%; 18 of 28 isolates were A1 mating type, the frequency of A1 mating type was 64.3%. The results also indicated that A2 mating type was all found in Weichang county and Kangbao county which were major potato-producing area of Hebei province. And we found that the average number of mature oospores produced per unit area varied from 10 to 2 300 per square centimeter. This article also described the characteristics of oogonium, antheridium and oospore.

关 键 词：马铃薯晚疫病菌 卵孢子 交配型 河北 

分 类 号：S435.32[农业科学—农业昆虫与害虫防治] S432.44[农业科学—植物保护]