Brouat Carine auteur aut IRD Tatard C. auteur aut IRD Ba K. auteur aut IRD Cosson J. F. auteur aut IRD Dobigny Gauthier auteur aut IRD Fichet Calvet E. auteur aut IRD Granjon Laurent auteur aut IRD Lecompte E. auteur aut IRD Loiseau Anne auteur aut IRD Mouline Karine auteur aut IRD Piry S. auteur aut IRD Duplantier Jean-Marc auteur aut IRD text journalArticle eng text/pdf born digital access Aim To investigate the phylogeographical structure of the Guinea multimammate mouse, Mastomys erythroleucus (Temminck, 1853), a widespread murid rodent in sub-Saharan (Sahel and Sudan) savannas, for a better understanding of the impacts of geographical and historical factors on the evolutionary history of this species, in the context of the growing database of phylogeographical studies of African savanna mammal species. Location Sahel and Sudan savannas, Africa. Methods We sequenced the whole cytochrome b gene in 211 individuals from 59 localities distributed from Senegal to Ethiopia. Sequence data were analysed using both phylogenetic (several rooted tree-construction methods, median-joining networks) and population genetic methods (spatial analyses of molecular variance, mismatch distributions). Results Haplotypes were distributed into four major monophyletic groups corresponding to distinct geographical regions across a west-east axis. Diversification events were estimated to have occurred between 1.16 and 0.18 Ma. Main conclusions Vicariance events related to the fragmentation of savanna habitats during the Pleistocene era may explain the phylogeographical patterns observed. Genetic structure was consistent with a role of major Sahelian rivers as significant barriers to west-east dispersal. Recent demographic expansions probably occurred during arid phases of the Holocene with the southward expansion of savannas. specialized Africa Mastomys erythroleucus mtDNA phylogeography Quaternary history rodent savanna sub-Sahara 080 36 12 2237-2250 2009 0305-0270 https://www.documentation.ird.fr/hor/fdi:010048401 10.1111/j.1365-2699.2009.02184.x 0305-0270 [F B010048401] https://www.documentation.ird.fr/hor/fdi:010048401 https://www.documentation.ird.fr/intranet/publi/2009/12/010048401.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2009-12-21 2017-08-23 fdi:010048401 fre