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URN: urn:nbn:de:kobv:517-opus-44893
URL: http://opus.kobv.de/ubp/volltexte/2010/4489/

Bleidorn, Christoph ; Podsiadlowski, Lars ; Zhong, Min ; Eeckhaut, Igor ; Hartmann, Stefanie ; Halanych, Kenneth M. ; Tiedemann, Ralph

On the phylogenetic position of Myzostomida : can 77 genes get it wrong?

Dokument 1.pdf (7.626 KB) (SHA-1:6f06a6dbbda71c5d3bf2a10ae486e36da5b8e794)

Kurzfassung in Englisch

Phylogenomic analyses recently became popular to address questions about deep
metazoan phylogeny. Ribosomal proteins (RP) dominate many of these analyses or are, in some cases, the only genes included. Despite initial hopes, hylogenomic analyses including tens to hundreds of genes still fail to robustly place many bilaterian taxa.

Using the phylogenetic position of myzostomids as an example, we show that phylogenies derived from RP genes and mitochondrial genes produce incongruent results. Whereas the former support a position within a clade of platyzoan taxa, mitochondrial data recovers an annelid affinity, which is strongly supported by the gene order data and is congruent with morphology. Using
hypothesis testing, our RP data significantly rejects the annelids affinity, whereas a platyzoan relationship is significantly rejected by the mitochondrial data.

We conclude (i) that reliance of a set of markers belonging to a single class of macromolecular complexes might bias the analysis, and (ii) that concatenation of all available data might introduce conflicting signal into phylogenetic analyses. We therefore strongly recommend testing for data incongruence in phylogenomic analyses. Furthermore, judging all available data, we consider the annelid affinity hypothesis more plausible than a possible platyzoan affinity for myzostomids, and suspect long branch attraction is influencing the RP data. However, this hypothesis needs further confirmation by future analyses.

Freie Schlagwörter (Englisch): Cirriferum myzostomida , Mitochondrial genomes , Transfer-rna , Data sets , Sequence
Institut: Institut für Biochemie und Biologie
DDC-Sachgruppe: Biowissenschaften, Biologie
Dokumentart: c Postprint
Schriftenreihe: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe, ISSN 1866-8372
Bandnummer: paper 123
Quelle: BMC Evolutionary Biology 9 (2009), Art. 150, DOI: 10.1186/1471-2148-9-150
Sprache: Englisch
Erstellungsjahr: 2009
Publikationsdatum: 16.07.2010
The article was originally published at BioMed Central:
BMC Evolutionary biology. - 9 (2009), Art. 150 (11 S.)
ISSN 1471-2148
DOI 10.1186/1471-2148-9-150
Lizenz: Dieses Werk ist unter einer Creative Commons-Lizenz lizenziert.
Lizenz-Logo  Creative Commons - Namensnennung, 2.0 Deutschland

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