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Molecular Biology and Evolution, Vol 10, 375-382, Copyright © 1993 by Society for Molecular Biology and Evolution

ORIGINAL ARTICLE

Mitochondrial DNA evolution in the Montium-species subgroup of Drosophila

P Pissios and ZG Scouras
Department of Genetics, Aristotle University, Thessaloniki, Greece.

Mitochondrial DNA (mtDNA) restriction-site maps for six species (10 strains) of the Drosophila montium subgroup were established. A total of 50 restriction sites were mapped, corresponding to 1.67% of the mtDNA genome. On the basis of differences in the restriction sites, nucleotide divergence (delta) was calculated for each pair of species (strains), and phylogenetic trees were constructed by using distance- matrix and parsimony methods. Comparison of the resultant phylogenetic trees shows that the sibling species D. auraria and D. quadraria are closely related. At the other extreme, considerable divergence was observed between the two strains of D. serrata and between D. serrata and D. birchii, a finding that contrasts with their grouping within the same species complex. Nevertheless, our data indicate that these six oriental montium species are rather closely related.
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