The evolutionary history and times of divergence of triatomine bug lineages are estimated from molecular clocks inferred from nucleotide sequences of the small subunit SSU (18S) and the second internal transcribed spacer (ITS-2) of the nuclear ribosomal DNA of these reduviids. The 18S rDNA molecular clock rate in Triatominae, and Prosorrhynchan Hemiptera in general, appears to be of 1.8% per 100 million years (my). The ITS-2 molecular clock rate in Triatominae is estimated to be around 0.4-1% per 1 my, indicating that ITS-2 evolves 23-55 times faster than 18S rDNA. Inferred chronological data about the evolution of Triatominae fit well with current hypotheses on their evolutionary histories, but suggest reconsideration of the current taxonomy of North American species complexes.
Nuclear rDNA-based molecular clock of the evolution of triatominae (Hemiptera: reduviidae), vectors of Chagas disease.
Bargues,Antonio Marcilla,Janine M. Ramsey,J. Dujardin,C. J. Schofield,Santiago Mas-Coma
Published 2000 in Memórias do Instituto Oswaldo Cruz
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- Publication year
2000
- Venue
Memórias do Instituto Oswaldo Cruz
- Publication date
2000-07-01
- Fields of study
Biology, Medicine, Environmental Science
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Semantic Scholar, PubMed
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