Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/46998
Título: Geographical structuring of mitochondrial DNA in Chalcides sexlineatus within the island of Gran Canaria
Autores/as: Pestano, J. 
Brown, R. P.
Clasificación UNESCO: 240108 Genética animal
Palabras clave: Microgeographic Variation
Sequence Variation
Pocket Gophers
Populations
Phylogeography, et al.
Fecha de publicación: 1999
Publicación seriada: Proceedings of the Royal Society B: Biological Sciences 
Resumen: The skink Chalcides sexlineatus shows clear north-south ecology-correlated variation in morphology within the island of Gran Canaria. Detailed study of this variation previously supported the hypothesis of in situ differentiation arising through climate-mediated variation in selection pressures. The more recent discovery of substantial within-island mitochondrial DNA (mtDNA) sequence divergence suggested an alternative historical vicariance scenario. This paper provides a detailed analysis of geographical structuring in mtDNA, based on a fragment amplified from the 12S rRNA region in 96 individuals. A very clear phylogeographic pattern was detected: three 'deep' lineages were evident corresponding to northern, south-eastern and south-western parts of Gran Canaria with generally low levels of mtDNA introgression. The pattern of among-site differentiation was highly concordant with the pattern of morphological variation. It also provided a close fit to a simple microevolutionary model based on population vicariance during volcanic eruptions known to have occurred during the past 2.8 million years in the north of the island. The minimum number of historical migration events required to explain the mtDNA tree was calculated and a novel randomization test used to show that there were a lower number of putative migrations across the morphology transition zone, relative to migrations within northern and southern zones. Differential adaptation to the two major habitat types and selection against hybrids may explain why the morphology transition zone coincides with the main ecotone and is relatively narrow, respectively.
URI: http://hdl.handle.net/10553/46998
ISSN: 0962-8452
DOI: 10.1098/rspb.1999.0709
Fuente: Proceedings of the Royal Society B: Biological Sciences[ISSN 0962-8452],v. 266, p. 805-812
Colección:Artículos
Vista completa

Citas SCOPUSTM   

34
actualizado el 24-mar-2024

Citas de WEB OF SCIENCETM
Citations

25
actualizado el 25-feb-2024

Visitas

44
actualizado el 19-ago-2023

Google ScholarTM

Verifica

Altmetric


Comparte



Exporta metadatos



Los elementos en ULPGC accedaCRIS están protegidos por derechos de autor con todos los derechos reservados, a menos que se indique lo contrario.