Phylogenomic Rhizobium Species Are Structured by a Continuum of Diversity and Genomic Clusters.

ABSTRACT: The bacterial genus Rhizobium comprises diverse symbiotic nitrogen-fixing species associated with the roots of plants in the Leguminosae family. Multiple genomic clusters defined by whole genome comparisons occur within Rhizobium, but their equivalence to species is controversial. In this study we investigated such genomic clusters to ascertain their significance in a species phylogeny context. Phylogenomic inferences based on complete sets of ribosomal proteins and stringent core genome markers revealed the main lineages of Rhizobium. The clades corresponding to R. etli and R. leguminosarum species show several genomic clusters with average genomic nucleotide identities (ANI > 95%), and a continuum of divergent strains, respectively. They were found to be inversely correlated with the gen

SUBMITTER: Gonzalez V 

PROVIDER: S-EPMC6503217 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature