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Phylogenetic maximum-parsimony tree calculated with partial 16S rRNA gene sequences (1,420 bp). The isolated Mesorhizobium sp. strain R8-Ret-T53-13d is indicated in bold. Maximum-parsimony (1,000 resamplings) bootstrap values are provided for relevant groups. Only values of >50% are shown. The maximum-likelihood consensus tree shares the same topology. The scale bar indicates 1% sequence divergence. The tree was rooted using Escherichia coli as an outgroup.
