Abstract：
:The nucleotide sequences of the rDNA second internal transcribed spacer (ITS-2) of 31 populations of 12 and 3 species of the two main Triatominae tribes Triatomini and Rhodniini, including the most important Chagas disease vectors, were obtained. Sequence comparisons and parsimony, distance, and maximum-likelihood analyses indicate that ITS-2 is a useful marker for resolving supraspecific, specific, subspecific, and even sometimes population-level relationships in Triatominae. Results were markedly different between species of Triatomini and Rhodniini, suggesting polyphyly. Phylogenetic trees support an old divergence between South American and North-Central American Triatomini and query the validity of some genera (Dipetalogaster, Psammolestes). The very low sequence variation between species of the phyllosoma complex suggests that subspecific ranking would be more appropriate. Triatoma dimidiata proves to be a clearly differentiated species, with several populations evidencing a clinal variation along a north-south axis and a population from Yucatan showing differences consistent with specific status.
journal_name
Mol Phylogenet Evoljournal_title
Molecular phylogenetics and evolutionauthors
Marcilla A,Bargues MD,Ramsey JM,Magallon-Gastelum E,Salazar-Schettino PM,Abad-Franch F,Dujardin JP,Schofield CJ,Mas-Coma Sdoi
10.1006/mpev.2000.0864keywords:
subject
Has Abstractpub_date
2001-01-01 00:00:00pages
136-42issue
1eissn
1055-7903issn
1095-9513pii
S1055-7903(00)90864-9journal_volume
18pub_type
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