MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
DNA BARCODES FOR THE BIRDS OF ARGENTINA AND A COMPARISON WITH NORTH AMERICAN BIRDS
Autor/es:
TUBARO, PABLO L.; KERR, KEVIN C. R.; LIJTMAER, DARÍO A.; BARREIRA, ANA S.; HEBERT, PAUL D. N.
Lugar:
Portland, Oregon, USA
Reunión:
Congreso; AOU/COS/SCO PDX 2008 MEETING; 2008
Institución organizadora:
American Ornithologists' Union, Cooper Ornithological Society, Society of Canadian Ornithologists
Resumen:
DNA-barcodes are short sequences from a standardized part of the mitochondrial genome (648 bp of the COI gene) used for species identification. Here, we describe the patterns of barcode variation in 1594 specimens belonging to 500 bird species from Argentina (51% of the species present in the country). Mean intraspecific distance (K2P) is 31-times lower than mean intrageneric distance (0.24% vs. 7.6%). All species can be separated in a neighbor-joining analysis, with the exception of six species of Sporophila seedeaters that share barcodes. A few pairs or trios of taxa have similar barcodes, but are still diagnosable. By contrast, 21 other species exhibit deep genetic structure (above 1.5% sequence divergence), including taxa in the families Furnariidae, Tyrannidae, Thamnophilidae and Troglodytidae. Compared with North American birds, our study revealed similar levels of COI variation. In species which occur in both North America and Argentina, we found deep genetic differences in 10 of 42 cases. Thus, our study reinforces the conclusion that DNA barcodes provide both a reliable tool for species identification and a rapid indication of interesting patterns of genetic variation.