Journal Article

Mitochondrial gene divergence of Colombian Drosophila pseudoobscura.

T M Jenkins, C J Basten and W W Anderson

in Molecular Biology and Evolution

Published on behalf of Society for Molecular Biology and Evolution

Volume 13, issue 9, pages 1266-1275
Published in print November 1996 | ISSN: 0737-4038
e-ISSN: 1537-1719 | DOI: https://dx.doi.org/10.1093/oxfordjournals.molbev.a025692
Mitochondrial gene divergence of Colombian Drosophila pseudoobscura.

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Isolated populations of drosophila pseudoobscura, separated from North American populations by about 2,400 km, were found in Colombia in 1960. We compared for sequences of the small ribosomal RNA (srRNA) gene on the mitochondria between North American and Colombian D. pseudoobscura in order to clarify the age of the Colombian isolates. The North American populations were not genetically different from each other but were genetically different from the Colombian populations. The Mexican strains represent the area from which the Colombian founders might have come. The estimated net nucleotide divergence between Mexican and Colombian D. pseudoobscura indicates that the Colombian population is not an ancient lineage. Phylogenies using both distance and parsimony methodologies reinforced this conclusion. The Colombian samples group together with both methods but, according to the bootstrap analysis, not significantly. It appears that the populations have not been separated long enough for their DNA sequences to show much divergence.

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Subjects: Evolutionary Biology ; Molecular and Cell Biology

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