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An In-depth Analysis of a Multilocus Phylogeny Identifies leuS As a Reliable Phylogenetic Marker for the Genus Pantoea

Identifieur interne : 000C10 ( Main/Exploration ); précédent : 000C09; suivant : 000C11

An In-depth Analysis of a Multilocus Phylogeny Identifies leuS As a Reliable Phylogenetic Marker for the Genus Pantoea

Auteurs : James T. Tambong ; Renlin Xu ; Cynthia-Anne Kaneza ; Jean-Claude Nshogozabahizi

Source :

RBID : PMC:4125426

Abstract

Partial sequences of six core genes (fusA, gyrB, leuS, pyrG, rlpB, and rpoB) of 37 strains of Pantoea species were analyzed in order to obtain a comprehensive view regarding the phylogenetic relationships within the Pantoea genus and compare tree topologies to identify gene(s) for reliable species and subspecies differentiation. All genes used in this study were effective at species-level delineation, but the internal nodes represented conflicting common ancestors in fusA- and pyrG-based phylogenies. Concatenated gene phylogeny gave the expected DNA relatedness, underscoring the significance of a multilocus sequence analysis. Pairwise comparison of topological distances and percent similarities indicated a significant differential influence of individual genes on the concatenated tree topology. leuS- and fusA-inferred phylogenies exhibited, respectively, the lowest (4) and highest (52) topological distances to the concatenated tree. These correlated well with high (96.3%) and low (64.4%) percent similarities of leuS- and fusA-inferred tree topologies to the concatenated tree, respectively. We conclude that the concatenated tree topology is strongly influenced by the gene with the highest number of polymorphic and non-synonymous sites in the absence of significant recombination events.


Url:
DOI: 10.4137/EBO.S15738
PubMed: 25125967
PubMed Central: 4125426


Affiliations:


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Le document en format XML

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<name sortKey="Nshogozabahizi, Jean Claude" sort="Nshogozabahizi, Jean Claude" uniqKey="Nshogozabahizi J" first="Jean-Claude" last="Nshogozabahizi">Jean-Claude Nshogozabahizi</name>
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species were analyzed in order to obtain a comprehensive view regarding the phylogenetic relationships within the
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genus and compare tree topologies to identify gene(s) for reliable species and subspecies differentiation. All genes used in this study were effective at species-level delineation, but the internal nodes represented conflicting common ancestors in
<italic>fus</italic>
A- and
<italic>pyr</italic>
G-based phylogenies. Concatenated gene phylogeny gave the expected DNA relatedness, underscoring the significance of a multilocus sequence analysis. Pairwise comparison of topological distances and percent similarities indicated a significant differential influence of individual genes on the concatenated tree topology.
<italic>leu</italic>
S- and
<italic>fus</italic>
A-inferred phylogenies exhibited, respectively, the lowest (4) and highest (52) topological distances to the concatenated tree. These correlated well with high (96.3%) and low (64.4%) percent similarities of
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S- and
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A-inferred tree topologies to the concatenated tree, respectively. We conclude that the concatenated tree topology is strongly influenced by the gene with the highest number of polymorphic and non-synonymous sites in the absence of significant recombination events.</p>
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