Bryja J. auteur aut IRD Granjon Laurent auteur aut IRD Dobigny Gauthier auteur aut IRD Patzenhauerova H. auteur aut IRD Konecny Adam auteur aut IRD Duplantier Jean-Marc auteur aut IRD Gauthier Philippe auteur aut IRD Colyn M. auteur aut IRD Durnez L. auteur aut IRD Lalis A. auteur aut IRD Nicolas V. auteur aut IRD text journalArticle eng text/pdf born digital access Rodents of the Praomys daltoni complex are typical inhabitants of the Sudanian savanna ecosystem in western Africa and represent a suitable model for testing the effects of Quaternary climatic oscillations on extant genetic variation patterns. Phylogeographical analyses of mitochondrial DNA sequences (cytochrome b) across the distribution range of the complex revealed several well-defined clades that do not support the division of the clade into the two species currently recognized on the basis of morphology, i.e. P. daltoni (Thomas, 1892) and Praomys derooi (Van der Straeten & Verheyen 1978). 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. West African rivers may also have contributed to genetic differentiation, especially by forming barriers after secondary contact of expanding populations. 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. Our results highlight the importance of combining different molecular markers for an accurate interpretation of genetic data. specialized cytochrome b microsatellites mtDNA introgression Quaternary rodents 080 020 19 21 4783-4799 2010 0962-1083 https://www.documentation.ird.fr/hor/fdi:010052865 10.1111/j.1365-294X.2010.04847.x 0962-1083 [F B010052865] https://www.documentation.ird.fr/hor/fdi:010052865 https://www.documentation.ird.fr/intranet/publi/2010/11/010052865.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2010-12-03 2017-08-23 fdi:010052865 fre