• Research in Plant Disease
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• v.16 no.3
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• pp.219-223
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• 2010

Recently, the oak wilt diseases especially on Quercus mongolica, have been increasing in various districts of Korea. A collection of 38 strains of the oak wilt pathogen Raffaelea qeurcus-mongolicae and R. quecivora isolated from Quercus spp. in Korea and Japan was characterized by $\beta$-tubulin gene sequence and randomly amplified polymorphic DNA (RAPD) analysis. In cluster analysis based on $\beta$-tubulin gene sequence the strains were divided into 4 clusters, of which clusters 2 and 4 were composed of Japanese strains except for one Korean strain. RAPD analysis showed that they were also effectively differentiated by a strong RAPD fragments. On the basis of the two genetic analysis, significant differences were detected between Korean strains and Japanese strains.