Mitochondrial and nuclear genes-based phylogeography of Arvicanthis niloticus (Murinae) and sub-Saharan open habitats pleistocene history

A phylogeographic study was conducted on the Nile grass rat, Arvicanthis niloticus, a rodent species that is tightly associated with open grasslands from the Sudano-Sahelian regions. Using one mitochondrial (cytochrome b) and one nuclear (intron 7 of Beta Fibrinogen) gene, robust patterns were retri...

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Veröffentlicht in:PloS one 2013-11, Vol.8 (11), p.e77815-e77815
Hauptverfasser: Dobigny, Gauthier, Tatard, Caroline, Gauthier, Philippe, Ba, Khalilou, Duplantier, Jean-Marc, Granjon, Laurent, Kergoat, Gael J
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Tatard, Caroline
Gauthier, Philippe
Ba, Khalilou
Duplantier, Jean-Marc
Granjon, Laurent
Kergoat, Gael J
description A phylogeographic study was conducted on the Nile grass rat, Arvicanthis niloticus, a rodent species that is tightly associated with open grasslands from the Sudano-Sahelian regions. Using one mitochondrial (cytochrome b) and one nuclear (intron 7 of Beta Fibrinogen) gene, robust patterns were retrieved that clearly show that (i) the species originated in East Africa concomitantly with expanding grasslands some 2 Ma, and (ii) four parapatric and genetically well-defined lineages differentiated essentially from East to West following Pleistocene bioclimatic cycles. This strongly points towards allopatric genetic divergence within savannah refuges during humid episodes, then dispersal during arid ones; secondary contact zones would have then stabilized around geographic barriers, namely, Niger River and Lake Chad basins. Our results pertinently add to those obtained for several other African rodent as well as non-rodent species that inhabit forests, humid zones, savannahs and deserts, all studies that now allow one to depict a more comprehensive picture of the Pleistocene history of the continent south of the Sahara. In particular, although their precise location remains to be determined, at least three Pleistocene refuges are identified within the West and Central African savannah biome.
doi_str_mv 10.1371/journal.pone.0077815
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subjects Africa South of the Sahara
Animal biology
Animal Distribution
Animals
Aridity
Arvicanthis niloticus
Basins
Bayes Theorem
Bioclimatology
Biodiversity
Biogeography
Cytochrome
Cytochrome b
Cytochromes b - genetics
Deserts
Dispersal
Divergence
Fibrin
Fibrinogen
Fibrinogen - genetics
Forest humidity
Genes, Mitochondrial
Genetic aspects
Genetic Variation
Grasslands
Haplotypes
Hippotragus equinus
History
Humanities and Social Sciences
Lake basins
Life Sciences
Mitochondria
Mitochondrial DNA
Models, Genetic
Murinae
Murinae - genetics
Other
Phylogeography
Pleistocene
Population genetics
Refuges
Rivers
Rodentia
Savannahs
Sequence Analysis, DNA
Species
title Mitochondrial and nuclear genes-based phylogeography of Arvicanthis niloticus (Murinae) and sub-Saharan open habitats pleistocene history
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