Genetic and reproductive evidence of natural hybridization between the sister species rhinella atacamensis and rhinella arunco (Anura, Bufonidae)
Author
dc.contributor.author
Correa, Claudio L.
Author
dc.contributor.author
Méndez, Marco A.
Author
dc.contributor.author
Veloso, Alberto
Author
dc.contributor.author
Sallaberry Ayerza, Michel
Admission date
dc.date.accessioned
2019-03-15T16:03:38Z
Available date
dc.date.available
2019-03-15T16:03:38Z
Publication date
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2012
Cita de ítem
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Journal of Herpetology, Volumen 46, Issue 4, 2018, Pages 568-577
Identifier
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00221511
Identifier
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10.1670/10-266
Identifier
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https://repositorio.uchile.cl/handle/2250/165872
Abstract
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Rhinella atacamensis and Rhinella arunco are sister species which, together, are distributed from 25°S to 38°S in Chile. Until recently they were considered to be allopatric, with the dividing line around 32°S, but in 2007 a possible zone of secondary contact was found in the Estero Pupío (32°S). We investigated the species status of adult individuals of three localities along this creek using AFLP markers. Data were analyzed with a Bayesian method that allowed the identification of different types of hybrids in a population. In two of the localities in the lower part of the watershed, the majority of the individuals were identified as backcrosses of hybrids with R. arunco or first generation hybrids, although a few individuals were classified as pure R. arunco. This information, supplemented by mitochondrial sequences and reproductive observations in both the laboratory and in the field, shows that hybridization has been a recurrent phenomenon at these two localities. By contrast, in