My research focuses on the taxonomy and evolution of root nodule bacterial genus Bradyrhizobium. This genus is an ecologically and agriculturally important assemblage. Although this group of bacteria has been the subject of many studies, emphasis is usually on the bacteria-legume interaction and its key role in improving agricultural sustainability. Relatively few studies have been done on the taxonomy and evolution of the genus Bradyrhizobium. The overall research objective for my study is thus to evaluate the current taxonomic status of the genus Bradyrhizobium using genome information and the future feasibility thereof. This study can provide us with the basis for using genome sequence information as a resource to investigate biological traits important to the delineation of this genus.