Phylogenetically informative rearrangements in mitochondrial genomes of Coleoptera, and monophyly of aquatic elateriform beetles (Dryopoidea)

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• 作者：Martijn J.T.N. Timmermans^a ; ^b ; ^{m.timmermans@nhm.ac.uk} ; Alfried P. Vogler^a ; ^b
• 关键词：Mitochondrial genome ; Translocation ; tRNA ; Coleoptera ; Dryopoidea ; Byrrhoidea ; Elateriformia ; Rearrangements ; Clade marker
• 刊名：Molecular Phylogenetics and Evolution
• 出版年：2012
• 期刊代码：176_10557903
• 类别：bio
• 出版时间：May, 2012
• 卷：63
• 期：2
• 页码：299-304
• 文件大小：523 K

摘要

Mitochondrial gene order in Coleoptera has been thought to be conservative but a survey of 60 complete or nearly complete genomes revealed a total of seven different gene rearrangements (deletions, gene order reversals), mainly affecting tRNA genes. All of these were found to be limited to a single taxon or a subclade of Coleoptera. The phylogenetic distribution of a translocation of tRNA^Pro in three species of elateriform beetles was investigated further by sequencing three nearly complete mitochondrial genomes (Dascillidae, Byrrhidae, Limnichidae) and ten additional individuals for a 鈭?370 bp diagnostic fragment spanning the relevant region. Phylogenetic analysis consistently recovered the monophyly of families previously grouped in the contentious superfamily Dryopoidea, a group of approximately 10 beetle families with mainly aquatic lifestyles. The Byrrhidae (moss beetles) were not part of this lineage, although they may be its sister group, to recover the widely accepted Byrrhoidea. The tRNA^Pro translocation was present in all members of Dryopoidea, but not in any other Elateriformia, providing independent support for this lineage and for a single origin of aquatic habits.