Genetic variation of the Chilean endemic long-haired mouse Abrothrix longipilis (Rodentia, Supramyomorpha, Cricetidae) in a geographical and environmental context
| Autor: | Guillermo D’Elía, Lourdes Valdez, Marcial Quiroga-Carmona |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Historical demography Demographic history Range (biology) Lineage (evolution) Allopatric speciation Zoology Abrotrichini lcsh:Medicine Context (language use) 010603 evolutionary biology 01 natural sciences General Biochemistry Genetics and Molecular Biology 03 medical and health sciences Abrothrix longipilis Chile 030304 developmental biology Isolation by distance 0303 health sciences Ecological niche modelling biology General Neuroscience lcsh:R General Medicine biology.organism_classification Phylogeography General Agricultural and Biological Sciences SNPs |
| Zdroj: | PeerJ, Vol 8, p e9517 (2020) |
| ISSN: | 2167-8359 |
| Popis: | Quaternary climate and associated vegetational changes affected the fauna of the Chilean Mediterranean ecosystem. Here we studied the genetic variation of the long-haired mouse,Abrothrix longipilis, a sigmodontine rodent endemic to this area. Within an environmentally explicit context, we examined the geographic distribution of the genetic diversity and demographic history of the species based on sequences of the mitochondrial Cytochrome-b gene of 50 individuals from 13 localities and a large panel of single nucleotide polymorphisms of 17 individuals from 6 localities. The gene genealogy ofA. longipilisrevealed three intraspecific lineages that are allopatric and latitudinally segregated (northern, central, and southern lineages) with an estimated crown age for the whole species clade of 552.3 kyr B.P. A principal component analysis based on 336,596 SNP loci is in line with the information given by the the mitochondrial gene genealogy.Along its complete distributional range,A. longipilisshowed patterns of isolation by distance and also isolation by environment. The general pattern of historical demography showed stability for most intraspecific lineages ofA. longipilis.Northern and central lineages showed signals of historical demographic stability, while the southern lineage showed contrasting signals. In agreement with this, the niche models performed showed that in the northern range ofA. longipilis, areas of high suitability for this species increased towards the present time; areas of central range would have remained relatively stable, while southern areas would have experienced more change through time. In summary, our study shows three distinct allopatric lineages ofA. longipilis, each showing slightly different demographic history. |
| Databáze: | OpenAIRE |
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