Cluster analysis was conducted using UPGMA. The result showed that genetic variation existed obviously among isolates of rice bacterial leaf streak (BLS) from different regions,isolates tested could be divided into 7 lineages (groups) .

• 应用Statistics软件UPGMA程序进行树状聚类分析 ；聚类结果表明 ；我国水稻细菌性条斑病菌具有明显的遗传分化 ；在遗传距离为 0 .；30时；供试菌株可划分为 7个遗传相似组 (谱系 )。