MACNBR   00242
MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
artículos
Título:
Secondary contact followed by gene flow between divergent mitochondrial lineages of a widespread Neotropical songbird (Zonotrichia capensis)
Autor/es:
CAMPAGNA, LEONARDO; KOPUCHIAN, CECILIA; TUBARO, PABLO L.; LOUGHEED, STEPHEN
Revista:
BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Lugar: Londres; Año: 2014 vol. 111 p. 863 - 868
ISSN:
0024-4066
Resumen:
Understanding how genetic and phenotypic differences that arise in geographically isolated populations influence
the outcome of secondary contact advances our knowledge of speciation. In the present study, we investigate the
secondary contact between divergent lineages of a widespread Neotropical songbird, the Rufous-collared sparrow
(Zonotrichia capensis). Zonotrichia capensis is morphologically and behaviourally diverse, and shows a pattern of
lineage diversification produced by a Pleistocene expansion and colonization of South America from a probable
Central American origin. Consistent with previous results, we find three lineages throughout the species range,
showing between 1.5% and 2.5% divergence in mitochondrial control region sequences. These lineages come into
secondary contact in the Dominican Republic, La Paz (Bolivia), and North-eastern Argentina. We use DNA
microsatellite data to study a broad secondary contact zone in North-eastern Argentina, finding that Bayesian
clustering analyses do not assign individuals to their respective mitochondrial lineages. Overall, we did not observe
nuclear genetic discontinuities in the study area. We conclude that, if genetic, morphological, and/or cultural
differences accumulated among lineages during isolation, they were insufficient to prevent gene flow after
secondary contact.