Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/12253
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Type: Journal article
Title: Contrasting rates of mitochondrial molecular evolution in parasitic diptera and hymenoptera
Author: Castro, L.
Austin, A.
Dowton, M.
Citation: Molecular Biology and Evolution, 2002; 19(7):1100-1113
Publisher: Soc Molecular Biology Evolution
Issue Date: 2002
ISSN: 0737-4038
1537-1719
Statement of
Responsibility: 
L. R. Castro, A. D. Austin and M. Dowton
Abstract: We investigated the putative association between the parasitic lifestyle and an accelerated rate of mt genetic divergence, compositional bias, and gene rearrangement, employing a range of parasitic and nonparasitic Diptera and Hymenoptera. Sequences were obtained for the cox1, cox2, 16S, 28S genes, the regions between the cox2 and atp8 genes, and between the nad3 and nad5 genes. Relative rate tests indicated generally that the parasitic lifestyle was not associated with an increased rate of genetic divergence in the Diptera but reaffirmed that it was in the Hymenoptera. Similarly, a departure from compositional stationarity was not associated with parasitic Diptera but was in parasitic Hymenoptera. Finally, mitochondrial (mt) gene rearrangements were not observed in any of the dipteran species examined. The results indicate that these genetic phenomena are not accelerated in parasitic Diptera compared with nonparasitic Diptera. A possible explanation for the differences in the rate of mt molecular evolution in parasitic Diptera and Hymenoptera is the extraordinary level of radiation that has occurred within the parasitic Hymenoptera but not in any of the dipteran parasitic lineages. If speciation events in the parasitic Hymenoptera are associated with founder events, a faster rate of molecular evolution is expected. Alternatively, biological differences between endoparasitic Hymenoptera and endoparasitic Diptera may also account for the differences observed in molecular evolution.
Keywords: Animals; Diptera; Hymenoptera; Isoenzymes; DNA, Mitochondrial; DNA, Ribosomal; RNA, Ribosomal, 28S; RNA, Transfer; Evolution, Molecular; Phylogeny; Gene Rearrangement; Base Sequence; Molecular Sequence Data; Prostaglandin-Endoperoxide Synthases; Cyclooxygenase 1; Cyclooxygenase 2; Genetic Variation
Description: © 2002 Society for Molecular Biology and Evolution
RMID: 0020020219
DOI: 10.1093/oxfordjournals.molbev.a004168
Appears in Collections:Ecology, Evolution and Landscape Science publications
Environment Institute Leaders publications

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