Reference : Lack of resolution in the animal phylogeny: Closely spaced cladogeneses or undetected sy...
Scientific journals : Article
Life sciences : Biochemistry, biophysics & molecular biology
http://hdl.handle.net/2268/70656
Lack of resolution in the animal phylogeny: Closely spaced cladogeneses or undetected systematic errors?
English
Baurain, Denis mailto [Université de Liège - ULg > Département des Sciences de la Vie > > >]
Brinkmann, Henner [Université de Montréal - UdeM > Canadian Institute for Advanced Research and Département de Biochimie > > >]
Philippe, Hervé [Université de Montréal - UdeM > Canadian Institute for Advanced Research and Département de Biochimie > > >]
Jan-2007
Molecular Biology and Evolution
Oxford Univ Press
24
1
6-9
Yes (verified by ORBi)
International
0737-4038
Oxford
[en] animal evolution ; phylogenomics ; phylogenetic resolution ; systematic error ; nonphylogenetic signal
[en] A recent phylogenomic study reported that the animal phylogeny was unresolved despite the use of 50 genes. This lack of resolution was interpreted as "a positive signature of closely spaced cladogenetic events." Here, we propose that this lack of resolution is rather due to the mutual cancellation of the phylogenetic signal (historical) and the nonphylogenetic signal (due to systematic errors) that results from inadequate taxon sampling and/or model of sequence evolution. Starting with a data set of comparable size, we use 3 different strategies to reduce the nonphylogenetic signal: 1) increasing the number of species; 2) replacing a fast-evolving species by a slowly evolving one; and 3) using a better model of sequence evolution. In all cases, the phylogenetic resolution is markedly improved, in agreement with our hypothesis that the originally reported lack of resolution was artifactual.
http://hdl.handle.net/2268/70656
http://mbe.oxfordjournals.org/cgi/content/full/24/1/6

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