中国东北和华北地区紫花苜蓿根瘤菌遗传多样性研究
李昕芫,娄金秀,刘清源,胡健,张英俊

Genetic Diversity Analysis of Rhizobia Associated with Medicago sativa Cultivated in Northeast and North China
LI XinYuan,LOU JinXiu,LIU QingYuan,HU Jian,ZHANG YingJun
图2 共生基因nodC(A)和nifH(B)的系统发育分析
Fig. 2 Neighbor-joining phylogenetic trees based on symbiotic gene nodC (A) and nifH (B)