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

Bleidorn, C., Podsiadlowski, L., Zhong, M., Eeckhaut, I., Hartmann, S., Halanych, K. M., et al. (2009). On the phylogenetic position of Myzostomida: can 77 genes get it wrong? BMC Evolutionary Biology, 9, 150. doi:10.1186/1471-2148-9-150.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-261F-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-2620-8
Genre: Journal Article

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 Creators:
Bleidorn, C.1, Author
Podsiadlowski, L.1, Author
Zhong, M.1, Author
Eeckhaut, I.1, Author
Hartmann, S.2, Author              
Halanych, K. M.1, Author
Tiedemann, R.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2BioinformaticsCRG, Cooperative Research Groups, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753315              

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Free keywords: cirriferum myzostomida mitochondrial genomes transfer-rna data sets sequence phylogenomics selection tree incongruence evolution
 Abstract: Background: 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, phylogenomic analyses including tens to hundreds of genes still fail to robustly place many bilaterian taxa. Results: 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. Conclusion: 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.

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Language(s): eng - English
 Dates: 2009-07-012009
 Publication Status: Published in print
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 Identifiers: ISI: ISI:000268674400001
DOI: 10.1186/1471-2148-9-150
ISSN: 1471-2148 (Electronic) 1471-2148 (Linking)
URI: ://000268674400001 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2716322/pdf/1471-2148-9-150.pdf?tool=pmcentrez
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Title: BMC Evolutionary Biology
Source Genre: Journal
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Pages: - Volume / Issue: 9 Sequence Number: - Start / End Page: 150 Identifier: -