Abstract:To study the population structure of the chestnut blight fungus Cryphonectria parasitica, a total of 142 isolates representing seven geological regions including China, Japan, Italy, and the United States were subject to random amplified polymorphic DNAs (RAPDs) analysis. Among the 120 random primers tested, nine were found to generate distinct DNA fragments. Our studies have shown that 89.52% of 124 RAPD fragments were polymorphic and the Jianyang population of China was the most polymorphic (66.94%), wher...