title: Multilocus phylogenetic analysis of the genus Aeromonas.
abstract: A broad multilocus phylogenetic analysis (MLPA) of the representative diversity of a genus offers the opportunity to incorporate concatenated inter-species phylogenies into bacterial systematics. Recent analyses based on single housekeeping genes have provided coherent phylogenies of Aeromonas. However, to date, a multi-gene phylogenetic analysis has never been tackled. In the present study, the intra- and inter-species phylogenetic relationships of 115 strains representing all Aeromonas species described to date were investigated by MLPA. The study included the independent analysis of seven single gene fragments (gyrB, rpoD, recA, dnaJ, gyrA, dnaX, and atpD), and the tree resulting from the concatenated 4705 bp sequence. The phylogenies obtained were consistent with each other, and clustering agreed with the Aeromonas taxonomy recognized to date. The highest clustering robustness was found for the concatenated tree (i.e. all Aeromonas species split into 100% bootstrap clusters). Both possible chronometric distortions and poor resolution encountered when using single-gene analysis were buffered in the concatenated MLPA tree. However, reliable phylogenetic species delineation required an MLPA including several "bona fide" strains representing all described species.
authors.affiliation: Molecular Diagnostics Center (MDC), Biomolecular Technologies S.L., and Universidad Miguel Hernández, Orihuela E-03300, Alicante, Spain. ammurcia@mdc-bt.com
authors.forename: Antonio J
authors.initials: AJ
authors.lastname: Martinez-Murcia
authors.forename: Arturo
authors.initials: A
authors.lastname: Monera
authors.forename: M Jose
authors.initials: MJ
authors.lastname: Saavedra
authors.forename: Remedios
authors.initials: R
authors.lastname: Oncina
authors.forename: Monserrate
authors.initials: M
authors.lastname: Lopez-Alvarez
authors.forename: Erica
authors.initials: E
authors.lastname: Lara
authors.forename: M Jose
authors.initials: MJ
authors.lastname: Figueras
mesh_terms: D000333:Aeromonas / Q000145:classification* / Q000235:genetics; D015373:Bacterial Typing Techniques; D001483:Base Sequence; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D005798:Genes, Bacterial / Q000235:genetics*; D008969:Molecular Sequence Data; D058885:Multilocus Sequence Typing / Q000379:methods*; D010802:Phylogeny; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA
chemical_list: D004269:DNA, Bacterial