Results of phenotype test shown that all peanut isolates and reference strains of b . japonicum and b . elkanii were clustered into a group and differed from the other genus of fast - growing rhizobia in low similarity 表型分析结果表明所有供试菌株与慢生参比菌株b . japonicum和b . elkanii聚为一群，而其它种属的参比菌株聚为另一群，表明花生根瘤菌在属的水平上应属于bradyrhizobium属。
