Twenty pairs of SSR primers in Prunus were used for PCR amplification on twenty-nine sweet cherry varieties introduced from foreign countries or bred in China during recent twenty years.SSR marker was used to analyze their genetic diversity.The results showed that nine of the primers,such as UDP98-409,revealed higher polymorphism.The clustering results showed that the 29 varieties were clustered into 5 groups with much genetic diversity.The clustering results based on SSR marker could basically show the rel...