Unequal evolutionary rates in the Drosophila virilis species group: I. The use of phylogeny-based Takezaki’s tests

The aim of this study is to test the hypothesis about an inconsistency in time estimation of the divergence and topology of species Drosophila kanekoi, D. ezoana , and D. littoralis which is caused by the irregular accumulation rate of replacements in different DNA sequences used for analysis and in...

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Bibliographic Details
Published in:Biology bulletin of the Russian Academy of Sciences 2010-02, Vol.37 (1), p.18-25
Main Authors: Kulikov, A. M., Lazebnyi, O. E., Gornostaev, N. G., Chekunova, A. I., Mitrofanov, V. G.
Format: Article
Language:English
Subjects:
Biochemistry
Biomedical and Life Sciences
Cell Biology
Drosophila virilis
Ecology
Genetics
Life Sciences
Zoology
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Summary:The aim of this study is to test the hypothesis about an inconsistency in time estimation of the divergence and topology of species Drosophila kanekoi, D. ezoana , and D. littoralis which is caused by the irregular accumulation rate of replacements in different DNA sequences used for analysis and in evolutionary lineages. The phylogenetic relationships based on sequences of five genes among 11 Drosophila species of the virilis group are revised, and estimation of molecular clock regularity in several phylogenetic lineages of this group is given. It was shown that Drosophila kanekoi, D. ezoana , and D. littoralis contituted in a single cluster, which was most related to the subphylad montana . The irregularity of molecular clocks was shown for the highly conservative sequences of the mt 12S-16S rRNA and Ras1 genes, the replacements of which were predominantly neutral. The irregularity of the molecular clock between several phylads and phylogenetic trees of subphylads lummei and kanekoi was revealed.
ISSN:1062-3590
1608-3059
DOI:10.1134/S1062359010010036