English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/38789
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Mitogenomic phylogenetic analyses of the Delphinidae with an emphasis on the Globicephalinae

AuthorsVilstrup, J.T.; Ho, Simon Y.W.; Foote, Andrew D.; Morin, Phillip A; Kreb, Danielle; Krutzen, Michael; Parra, Guido J; Robertson, Kelly M.; de Stephanis, Renaud ; Verborgh, Philippe; Willerslev, E.; Orlando, Ludovic; Gilbert, M.T.P.
Issue Date10-Mar-2011
PublisherBioMed Central
CitationBMC Evolutionary Biology. 11(1):65 (2011)
AbstractAbstract Background Previous DNA-based phylogenetic studies of the Delphinidae family suggest it has undergone rapid diversification, as characterised by unresolved and poorly supported taxonomic relationships (polytomies) for some of the species within this group. Using an increased amount of sequence data we test between alternative hypotheses of soft polytomies caused by rapid speciation, slow evolutionary rate and/or insufficient sequence data, and hard polytomies caused by simultaneous speciation within this family. Combining the mitogenome sequences of five new and 12 previously published species within the Delphinidae, we used Bayesian and maximum-likelihood methods to estimate the phylogeny from partitioned and unpartitioned mitogenome sequences. Further ad hoc tests were then conducted to estimate the support for alternative topologies. Results We found high support for all the relationships within our reconstructed phylogenies, and topologies were consistent between the Bayesian and maximum-likelihood trees inferred from partitioned and unpartitioned data. Resolved relationships included the placement of the killer whale (Orcinus orca) as sister taxon to the rest of the Globicephalinae subfamily, placement of the Risso's dolphin (Grampus griseus) within the Globicephalinae subfamily, removal of the white-beaked dolphin (Lagenorhynchus albirostris) from the Delphininae subfamily and the placement of the rough-toothed dolphin (Steno bredanensis) as sister taxon to the rest of the Delphininae subfamily rather than within the Globicephalinae subfamily. The additional testing of alternative topologies allowed us to reject all other putative relationships, with the exception that we were unable to reject the hypothesis that the relationship between L. albirostris and the Globicephalinae and Delphininae subfamilies was polytomic. Conclusion Despite their rapid diversification, the increased sequence data yielded by mitogenomes enables the resolution of a strongly supported, bifurcating phylogeny, and a chronology of the divergences within the Delphinidae family. This highlights the benefits and potential application of large mitogenome datasets to resolve long-standing phylogenetic uncertainties.
Appears in Collections:(EBD) Artículos
Files in This Item:
File Description SizeFormat 
1471-2148-11-65.xml98,95 kBXMLView/Open
1471-2148-11-65-S5.PDF48,05 kBAdobe PDFThumbnail
1471-2148-11-65-S2.PDF36,34 kBAdobe PDFThumbnail
1471-2148-11-65-S1.PDF103,01 kBAdobe PDFThumbnail
1471-2148-11-65-S4.PDF37,92 kBAdobe PDFThumbnail
1471-2148-11-65-S3.PDF46,8 kBAdobe PDFThumbnail
1471-2148-11-65.pdf2,13 MBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.