Genomic fingerprints of 53 strains of U. virens from different counties (districts) in Hunan were analyzed by 10 RAPD primers. The results showed that all strains tested were divided into five genetic lineages( Ⅰ,Ⅱ,Ⅲ,Ⅳ,Ⅴ) at 0.78 level of the genetic similarity through the clustering analysis of UPGMA. The five genetic lineages separately contained numbers ostrains, 42, 7, 2, 1 and 1, in which they accounted for the rates of 79%, 13%, 4%, 2% and 2%, respectively and the lineage I was the dominant one with the rates of 79%. And it showe...