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How stable is the "Polyphyly of Lice" hypothesis (Insecta: Psocodea)? : A comparison of phylogenetic signal in multiple genes

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Title: How stable is the "Polyphyly of Lice" hypothesis (Insecta: Psocodea)? : A comparison of phylogenetic signal in multiple genes
Authors: Yoshizawa, Kazunori Browse this author
Johnson, Kevin P. Browse this author
Keywords: Psocodea
Parasitic lice
Multigene phylogeny
Phylogenetic signal
Issue Date: Jun-2010
Publisher: Elsevier
Journal Title: Molecular Phylogenetics and Evolution
Volume: 55
Issue: 3
Start Page: 939
End Page: 951
Publisher DOI: 10.1016/j.ympev.2010.02.026
PMID: 20211746
Abstract: Recent molecular phylogenetic analyses of 18S rDNA have indicated that parasitic lice (order Phthiraptera) are possibly polyphyletic. These analyses recovered one of the parasitic louse suborders, Amblycera, as the sister group to the free-living booklouse family Liposcelididae. We further tested this hypothesis using DNA sequences from five genes: nuclear 18S rDNA, Histone 3, and wingless and mitochondrial 16S rDNA and COI. Combined analyses of these five genes provided reasonably strong support for the Amblycera + Liposcelididae clade, supporting the polyphyly of lice hypothesis. To explore the robustness of this result, we examined the phylogenetic signal contained in each gene independently (except for wingless, which could not be readily amplified in many target taxa). Analyses of each gene separately and in various combinations with other genes revealed that clear signal supporting Amblycera + Liposcelididae only existed in the 18S data, although no analysis supported monophyly of parasitic lice. Nevertheless, combined analyses of all genes provided stronger support for this relationship than that obtained from 18S data alone. The increase in support for this clade was mostly explained by the stabilization of other parts of the tree and potentially inappropriate substitution modeling. These findings demonstrate that the increased support values provided by combined data set does not always indicate corroboration of the hypothesis.
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 吉澤 和徳

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