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Phylogenetic tree estimated by the NJ method with the sequences of rrs genes using the Tamura Nei model considering gamma (α-parameter=0.9271). The alignment length was 1416 nucleotides, from positions 28 to 1444 of the rrs gene of Sinorhizobium meliloti 1021. Only bootstrap values ≥50% are shown. Type strains are indicated by superscript T. Sinorhizobium chiapanecum is shown in bold.
