1887

Abstract

The phylogenetic relationships of all known species of the genus , and especially and , were investigated on 70 strains using the sequence, which encodes the factor. This analysis was complemented with the sequence of , which has already proven useful for determining the phylogenetic relationships in the genus. Nucleotide sequences of and showed that both genes had similar substitution rates (<2 %) and a similar number of variable positions (34 % for versus 32 % for ). Strain groupings by analysis of , and a combination of both genes were consistent with the taxonomic organization of all species described to date. However, the simultaneous analysis of both clocks improved the reliability and the power to differentiate, in particular, closely related taxa. At the inter-species level, showed a better resolution for differentiating sp. HG11/ and //, while more clearly differentiated from . The analysis of provided initial evidence for clear phylogenetic divergence between the latter two species.

Keyword(s): HG, homology group
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2004-09-01
2019-12-08
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vol. , part 5, pp. 1511–1519

A matrix table showing nucleotide substitution rates in and sequences is available to download. [PDF](117KB)



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