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1 December 2006 PHYLOGEOGRAPHY OF THE SUBTERRANEAN RODENT CTENOMYS AUSTRALIS IN SAND-DUNE HABITATS: EVIDENCE OF POPULATION EXPANSION
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Abstract

In this work we examined the geographic genetic structure of the subterranean herbivorous rodent Ctenomys australis (sand-dune tuco-tuco) using mitochondrial DNA (mtDNA) control region (D-loop) sequences. We found 24 haplotypes in the analysis of 70 individual 403–base pair sequences; most were restricted to single populations, although a few haplotypes were shared broadly across the species' range. Genetic differentiation was not consistent with a simple model of isolation by distance, possibly evidencing a lack of equilibrium between gene flow and local genetic drift. The analysis of mismatch distributions, Fu's FS-test of neutrality and the “starlike” topology of the gene genealogy showed a pattern consistent with a recent population expansion event. However, we could not rule out an alternative explanation based on departures from strict neutrality of mtDNA.

Matías Sebastián Mora, Enrique Pablo Lessa, Marcelo Javier Kittlein, and Aldo Iván Vassallo "PHYLOGEOGRAPHY OF THE SUBTERRANEAN RODENT CTENOMYS AUSTRALIS IN SAND-DUNE HABITATS: EVIDENCE OF POPULATION EXPANSION," Journal of Mammalogy 87(6), (1 December 2006). https://doi.org/10.1644/05-MAMM-A-399R1.1
Accepted: 1 April 2006; Published: 1 December 2006
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