Nuclear rDNA-based molecular clock of the evolution of triatominae (Hemiptera: Reduviidae), vectors of Chagas disease
Mem. Inst. Oswaldo Cruz
;
95(4): 567-73, July-Aug. 2000.
Article
Dans Anglais
| LILACS
| ID: lil-264234
ABSTRACT
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 cent per 100 million years (my). The ITS-2 molecular clock rate in Triatominae is estimated to be around 0.4-1 per cent 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.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Horloges biologiques
/
ADN ribosomique
/
Triatominae
/
Maladie de Chagas
/
Évolution moléculaire
Limites du sujet:
Animaux
langue:
Anglais
Texte intégral:
Mem. Inst. Oswaldo Cruz
Thème du journal:
Médecine tropicale
/
Parasitologie
Année:
2000
Type:
Article
/
descriptif de projet
Pays d'affiliation:
Mexique
/
Espagne
/
Royaume-Uni
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