RhizobiumLupinusOchrobactrumRhizobium leguminosarumRhizobium etliRhizobium tropiciNitrogen FixationFabaceaeGeneticsSinorhizobium melilotiRhizobiaceaePlants, MedicinalRoot Nodules, PlantMedicago sativaPlant Root NodulationSinorhizobiumGenes, BacterialPhaseolusGenetics, PopulationMolecular Sequence DataPlant RootsBradyrhizobiumBacterial ProteinsDNA, Bacterial