A comprehensive overview of the genetic diversity in Thylamys elegans (Didelphimorphia: Didelphidae): establishing the phylogeographic determinants

Abstract Background For the genus Thylamys, the rivers have been reported as barriers to dispersal, limiting current and historical distribution of its lineages. We hypothesized that the Maipo river has affected the genetic structure of northern and southern lineages of Thylamys elegans, recovering...

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Autores principales:	Dusan Boric-Bargetto, Álvaro Zúñiga-Reinoso, Oscar Inostroza-Michel, Enrique Rodríguez-Serrano, Daniel González-Acuña, R. Eduardo Palma, Cristián E. Hernández
Formato:	article
Lenguaje:	EN
Publicado:	BMC 2021
Materias:	Rivers Mountains Glaciations Hiperaridity Lineages Zoology QL1-991 Botany QK1-989
Acceso en línea:	https://doaj.org/article/9774ecc236fd4f99b750c961563ecbea
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spelling	oai:doaj.org-article:9774ecc236fd4f99b750c961563ecbea2021-11-14T12:13:21ZA comprehensive overview of the genetic diversity in Thylamys elegans (Didelphimorphia: Didelphidae): establishing the phylogeographic determinants10.1186/s40693-021-00103-50717-6317https://doaj.org/article/9774ecc236fd4f99b750c961563ecbea2021-11-01T00:00:00Zhttps://doi.org/10.1186/s40693-021-00103-5https://doaj.org/toc/0717-6317Abstract Background For the genus Thylamys, the rivers have been reported as barriers to dispersal, limiting current and historical distribution of its lineages. We hypothesized that the Maipo river has affected the genetic structure of northern and southern lineages of Thylamys elegans, recovering a phylogenetic relationships with reciprocally monophyletic sister groups on opposite river banks. We evaluated the role of other rivers in the Mediterranean zone of Chile as historical and recent modulators of the biogeographic processes of this species. Methods We applied a phylogeographic approach, using the cytochrome-b mitochondrial gene for 93 individuals of T. elegans, from 37 localities in a latitudinal gradient between 21°25’ and 35˚56’S, encompassing a geographic area between the Atacama Desert and most of the Mediterranean Chilean zone. Results The phylogenetics results recovered six lineages within T. elegans: Thylamys elegans elegans, Thylamys elegans coquimbensis, the Loa lineage and three other lineages not described previously (Aconcagua, South 1 and South 2). We suggest that following rivers play a role like primary barrier: the Maipo river in the genetic differentiation of northern and southern ancestral lineages, and the Mataquito river and its tributary Teno river for the South 1 and South 2 lineages. On the other hand, the Quilimarí river preserve the genetic divergence in T. e. coquimbensis and Aconcagua lineage and the Aconcagua river in Aconcagua lineage and T. e. elegans acting like secondary barriers. Conclusions We concluded that the genetic diversity and biogeographic history of T. elegans was shaped by mountain glaciers, changes in river water levels during the Pleistocene glaciations and hyperaridity, promoting the differentiation and persistance of the T. elegans lineages.Dusan Boric-BargettoÁlvaro Zúñiga-ReinosoOscar Inostroza-MichelEnrique Rodríguez-SerranoDaniel González-AcuñaR. Eduardo PalmaCristián E. HernándezBMCarticleRiversMountainsGlaciationsHiperaridityLineagesZoologyQL1-991BotanyQK1-989ENRevista Chilena de Historia Natural, Vol 94, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Rivers Mountains Glaciations Hiperaridity Lineages Zoology QL1-991 Botany QK1-989
spellingShingle	Rivers Mountains Glaciations Hiperaridity Lineages Zoology QL1-991 Botany QK1-989 Dusan Boric-Bargetto Álvaro Zúñiga-Reinoso Oscar Inostroza-Michel Enrique Rodríguez-Serrano Daniel González-Acuña R. Eduardo Palma Cristián E. Hernández A comprehensive overview of the genetic diversity in Thylamys elegans (Didelphimorphia: Didelphidae): establishing the phylogeographic determinants
description	Abstract Background For the genus Thylamys, the rivers have been reported as barriers to dispersal, limiting current and historical distribution of its lineages. We hypothesized that the Maipo river has affected the genetic structure of northern and southern lineages of Thylamys elegans, recovering a phylogenetic relationships with reciprocally monophyletic sister groups on opposite river banks. We evaluated the role of other rivers in the Mediterranean zone of Chile as historical and recent modulators of the biogeographic processes of this species. Methods We applied a phylogeographic approach, using the cytochrome-b mitochondrial gene for 93 individuals of T. elegans, from 37 localities in a latitudinal gradient between 21°25’ and 35˚56’S, encompassing a geographic area between the Atacama Desert and most of the Mediterranean Chilean zone. Results The phylogenetics results recovered six lineages within T. elegans: Thylamys elegans elegans, Thylamys elegans coquimbensis, the Loa lineage and three other lineages not described previously (Aconcagua, South 1 and South 2). We suggest that following rivers play a role like primary barrier: the Maipo river in the genetic differentiation of northern and southern ancestral lineages, and the Mataquito river and its tributary Teno river for the South 1 and South 2 lineages. On the other hand, the Quilimarí river preserve the genetic divergence in T. e. coquimbensis and Aconcagua lineage and the Aconcagua river in Aconcagua lineage and T. e. elegans acting like secondary barriers. Conclusions We concluded that the genetic diversity and biogeographic history of T. elegans was shaped by mountain glaciers, changes in river water levels during the Pleistocene glaciations and hyperaridity, promoting the differentiation and persistance of the T. elegans lineages.
format	article
author	Dusan Boric-Bargetto Álvaro Zúñiga-Reinoso Oscar Inostroza-Michel Enrique Rodríguez-Serrano Daniel González-Acuña R. Eduardo Palma Cristián E. Hernández
author_facet	Dusan Boric-Bargetto Álvaro Zúñiga-Reinoso Oscar Inostroza-Michel Enrique Rodríguez-Serrano Daniel González-Acuña R. Eduardo Palma Cristián E. Hernández
author_sort	Dusan Boric-Bargetto
title	A comprehensive overview of the genetic diversity in Thylamys elegans (Didelphimorphia: Didelphidae): establishing the phylogeographic determinants
title_short	A comprehensive overview of the genetic diversity in Thylamys elegans (Didelphimorphia: Didelphidae): establishing the phylogeographic determinants
title_full	A comprehensive overview of the genetic diversity in Thylamys elegans (Didelphimorphia: Didelphidae): establishing the phylogeographic determinants
title_fullStr	A comprehensive overview of the genetic diversity in Thylamys elegans (Didelphimorphia: Didelphidae): establishing the phylogeographic determinants
title_full_unstemmed	A comprehensive overview of the genetic diversity in Thylamys elegans (Didelphimorphia: Didelphidae): establishing the phylogeographic determinants
title_sort	comprehensive overview of the genetic diversity in thylamys elegans (didelphimorphia: didelphidae): establishing the phylogeographic determinants
publisher	BMC
publishDate	2021
url	https://doaj.org/article/9774ecc236fd4f99b750c961563ecbea
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A comprehensive overview of the genetic diversity in Thylamys elegans (Didelphimorphia: Didelphidae): establishing the phylogeographic determinants

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