Abstract:Genetic diversity of rhizobia from peanut on Jiangh an Plain and adjacent area was studied by the methods of Randomly Amplified Poly morphic DNA (RAPD) and 16S-23S rRNA Intergenic Spacer (IGS) PCR RFLP. The resul ts showed that all strains were divided into 2 groups at the similarity 48% or 5 0% respectively. Peanut rhizobia and representatives of B.japonicum and B. elkanii were clustered into group I and the reference strains of Rhizobium, Sinorhizobium, Mesorhizobium and Agrobacterium were clustered into...