Reevaluation of Phylogeny in the Drosophila obscura Species Group Based on Combined Analysis of Nucleotide Sequences

The Drosophila obscura species group has served as an important model system in many evolutionary and population genetic studies. Despite the amount of study this group has received, some phylogenetic relationships remain unclear. While individual analysis of different nuclear, mitochondrial, allozy...

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Bibliographic Details
Published in:Molecular phylogenetics and evolution 1999-07, Vol.12 (2), p.124-139
Main Author: O'Grady, Patrick M.
Format: Article
Language:English
Subjects:
Animals
Base Sequence
Cell Nucleus - genetics
Classification
DNA - genetics
DNA, Mitochondrial - genetics
Drosophila - classification
Drosophila - genetics
Drosophila obscura species group
Evolution, Molecular
Genes, Insect
Molecular Sequence Data
Nucleotides - genetics
Phylogeny
Sequence Alignment
Sequence Analysis, DNA
simultaneous analysis
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Summary:The Drosophila obscura species group has served as an important model system in many evolutionary and population genetic studies. Despite the amount of study this group has received, some phylogenetic relationships remain unclear. While individual analysis of different nuclear, mitochondrial, allozyme, restriction fragment, and morphological data partitions are able to discern relationships among closely related species, they are unable to resolve relationships among the five obscura species subgroups. A combined analysis of several nucleotide data sets is able to provide resolution and support for some nodes not seen or well supported in analyses of individual loci. A phylogeny of the obscura species group based on combined analysis of nucleotide sequences from six mitochondrial and five nuclear loci is presented here. The results of several different combined analyses indicate that the Old World obscura and subobscura subgroups form a monophyletic clade, although they are unable to resolve the relationships among the major lineages within the obscura species group.
ISSN:1055-7903
1095-9513
DOI:10.1006/mpev.1998.0598