Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.12/1432
Título: Reading the history of a hybrid fish complex from its molecular record
Autor: Santos, Carla Sousa
Collares-Pereira, Maria João
Almada, Vítor Carvalho
Palavras-chave: Squalius alburnoides
Hybrid complex
Data: 2007
Editora: Elsevier
Citação: Molecular Phylogenetics and Evolution, 45, 981-996
Resumo: Squalius alburnoides is a widely distributed intergeneric hybrid complex with fish of both sexes, varying ploidy levels and proportions of the parental genomes. Its dispersal routes were here delineated and framed by the reconstruction of the phylogeny and phylogeography of other Squalius with which it hybridizes, based on the available data on the paleohydrographical history of the Iberian Peninsula. Results based on sequences of cytochrome b and beta-actin genes showed that: proto-Squalius pyrenaicus originated at least five species as it dispersed throughout the Iberian Peninsula in the Mio-Pliocene; the S. alburnoides complex likely had a single origin in the bulk of Iberia, in the Upper Tagus/Guadiana area, when hydrographical rearrangements allowed the contact between its ancestors (around 700,000 years ago); interspecific crosses allowed the introgression of mitochondrial and nuclear genes of S. alburnoides in allopatric species/ populations of other Squalius and vice-versa; and reconstituted S. alburnoides non-hybrid males may contribute to the replacement of the typical mtDNA of the complex (in the populations where they occur, crosses with females of other Squalius seem to have been especially frequent). A number of dispersal events and colonization routes are proposed.
Peer review: yes
URI: http://hdl.handle.net/10400.12/1432
ISSN: 1055-7903
Aparece nas colecções:UIE-E - Artigos em revistas internacionais

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