title: Molecular phylogeny and a taxonomic proposal for the genus Streptococcus.
abstract: Alternative phylogenies for the genus Streptococcus have been proposed due to uncertainty about the among-species group relationships. Here, we performed a phylogenetic analysis of the genus Streptococcus, considering all the species groups and also the genomic data accumulated by other studies. Seventy-five species were subjected to a Bayesian phylogenetic analysis using sequences from eight genes (16S rRNA, rpoB, sodA, tuf, rnpB, gyrB, dnaJ, and recN). On the basis of our results, we propose a new Phylogeny for the genus, with special emphasis on the inter-species group level. This new phylogeny differs from those suggested previously. From topological and evolutionary distance criteria, we propose that gordonii, pluranimalium, and sobrinus should be considered as new species groups, in addition to the currently recognized groups of mutans, bovis, pyogenic, suis, mitis, and salivarius.
authors.affiliation: Laboratorio de Antropología, Departamento de Antropología, Facultad de Ciencias Sociales, Universidad de Chile, Santiago, Chile.
authors.forename: F
authors.initials: F
authors.lastname: Póntigo
authors.affiliation: Laboratorio de Antropología, Departamento de Antropología, Facultad de Ciencias Sociales, Universidad de Chile, Santiago, Chile.
authors.forename: M
authors.initials: M
authors.lastname: Moraga
authors.affiliation: Laboratorio de Antropología, Departamento de Antropología, Facultad de Ciencias Sociales, Universidad de Chile, Santiago, Chile.
authors.forename: S V
authors.initials: SV
authors.lastname: Flores
mesh_terms: D001499:Bayes Theorem; D005075:Biological Evolution; D002965:Classification / Q000379:methods; D004269:DNA, Bacterial / Q000235:genetics; D016680:Genome, Bacterial; D010802:Phylogeny; D017422:Sequence Analysis, DNA; D013045:Species Specificity; D013291:Streptococcus / Q000145:classification* / Q000235:genetics*
chemical_list: D004269:DNA, Bacterial