Genotypic analysis of isolated peanut-nodulating rhizobial strains reveals differences among populations obtained from soils with different cropping histories

► We study genetic diversity of peanut rhizobia from different cropping history areas. ► Genetic similarity between strains from different peanut cropping areas was observed. ► Peanut nodulating rhizobia showed identity with members of Bradyrhizobium genus. ► The presence of the legume selects for particular taxa of rhizobia. ► Molecular data indicate high genetic diversity for peanut nodulating rhizobia.