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- W1594865154 startingPage "453" @default.
- W1594865154 abstract "The allotetraploid Tympanoctomys barrerae has a broad, patchy distribution around salt flats in western Argentina. To gain insights into its phylogenetic relationships, phylogeographical patterns, and origin, seven populations of T. barrerae and its allied taxa were studied through a 1075-bp fragment of cytochrome b and cytochrome oxidase I. Matrilineal phylogenetic relationships were explored with maximum likelihood and Bayesian approaches. The intraspecific genealogy was inferred by median-joining networks. The populational structure was assessed by molecular variance, and the demographic history through coalescence. The tree topology depicted sister-group relationship between Octomys mimax to the pair T. barrerae–Pipanacoctomys aureus, suggesting P. aureus belongs to the maternal lineage that gave rise to T. barrerae. High degrees of intrapopulational variation and the several instances of interpopulational polyphyly suggest range shifts and secondary contact. Consistent with the phylogenetic results, the network analysis revealed two haplotypic lineages depicting genetic admixtures unrelated to the current geographical distribution, and a deep split with the southernmost lineage of Chubut. The origin of T barrerae was estimated at approximately 2.52 Mya, whereas the divergence estimate for Chubut coincides with the end of largest Patagonian glaciation, at 1.47 Mya. Apparently, this population remained isolated during a northward Pleistocenic range shift. The historical demographic patterns of the lineages of T. barrerae fit with a contraction–expansion model coincident with Quaternary cycling events." @default.
- W1594865154 created "2016-06-24" @default.
- W1594865154 creator A5006355989 @default.
- W1594865154 creator A5023994877 @default.
- W1594865154 creator A5061491973 @default.
- W1594865154 creator A5083974647 @default.
- W1594865154 creator A5089433588 @default.
- W1594865154 creator A5090192216 @default.
- W1594865154 date "2012-12-17" @default.
- W1594865154 modified "2023-09-27" @default.
- W1594865154 title "Phylogenetic analysis and phylogeography of the tetraploid rodentTympanoctomys barrerae(Octodontidae): insights on its origin and the impact of Quaternary climate changes on population dynamics" @default.
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- W1594865154 doi "https://doi.org/10.1111/j.1095-8312.2012.02016.x" @default.