Plio-Pleistocene history of West African Sudanian savanna and the phylogeography of the Praomys daltoni complex (Rodentia): the environment/geography/genetic interplay

0348076 - ÚBO 2011 RIV GB eng J - Journal Article
Bryja, Josef - Granjon, L. - Dobigny, G. - Patzenhauerová, Hana - Konečný, Adam - Duplantier, J.-M. - Gauthier, P. - Colyn, M. - Durnez, L. - Lalis, A. - Nicolas, V.
Plio-Pleistocene history of West African Sudanian savanna and the phylogeography of the Praomys daltoni complex (Rodentia): the environment/geography/genetic interplay.
Molecular Ecology. Roč. 19, č. 21 (2010), s. 4783-4799. ISSN 0962-1083. E-ISSN 1365-294X
R&D Projects: GA AV ČR IAA6093404; GA ČR GAP506/10/0983
Institutional research plan: CEZ:AV0Z60930519
Keywords : cytochrome b * microsattelites * mtDNA introgression * Quaternary * rodenta
Subject RIV: EG - Zoology
Impact factor: 6.457, year: 2010

Phylogeographical analyses of mitochondrial DNA sequences (cytochrome b) across the distribution range of rodents of the Praomys daltoni complex revealed several well-defined clades that do not support the division into the two species currently recognized on the basis of morphology. The observed genetic structure fits the refuge hypothesis, suggesting that only a small number of populations repeatedly survived in distinct forest-savanna mosaic blocks during the arid phases of the Pleistocene, and then expanded again during moister periods. The combination of three types of genetic markers (mtDNA sequences, microsatellite loci, cytogenetic data) provides evidence for the presence of up to three lineages, which most probably represent distinct biological species. Furthermore, incongruence between nuclear and mtDNA markers in some individuals unambiguously points towards a past introgression event.
Permanent Link: http://hdl.handle.net/11104/0188693