采用同工酶聚丙烯酰胺凝胶电泳方法分析了７个栗疫菌（Ｃｒｙｐｈｏｎｅｃｔｒｉａｐａｒａｓｉｔｉｃａ）群体的遗传结构．遗传相似性分析表明中国４个群体间相似性较好；美国群体与意大利群体相似，而且它们与日本群体的相似性优于与中国群体的相似性，表明美国的栗疫菌可能是从日本传入的．总群体的遗传差异为０．１６０，其中８１．３％由群体内的变异引起，１６．９％由群体间的差异引起．群体间的基因流动值为２．４６． The isozyme polyacrylamide gel electrophoresis was used to analyze the genetic structure of seven populations of Cryphonectria parasitica. Genetic similarity analysis showed that the four Chinese populations had similarities. The US groups were similar to the Italian ones, and their similarity with the Japanese population was better than that with the Chinese population. Into The genetic variation of the total population was 0.160, of which 81.3% was caused by intraspecific variation and 16.9% due to differences among populations. Gene flow between populations was 2.46.