The role of river drainages in shaping the genetic structure of capybara populations

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The capybara, Hydrochoerus hydrochaeris, is an herbivorous rodent widely distributed throughout most of South American wetlands that lives closely associated with aquatic environments. In this work, we studied the genetic structure of the capybara throughout part of its geographic range in Argentina...

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Autores principales: Quintana, Rubén Darío, Cassini, Marcelo Hernán, Túnez, Juan Ignacio
Publicado: 2015
Materias:
HVRI
Hydrochoerus hydrochaeris
Mitochondrial DNA
River basins
South America
mitochondrial DNA
animal
Argentina
flooding
genetics
Paraguay
river
rodent
Venezuela
Animals
DNA, Mitochondrial
Floods
Rivers
Rodentia
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166707_v143_n6_p645_Byrne
http://hdl.handle.net/20.500.12110/paper_00166707_v143_n6_p645_Byrne
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00166707_v143_n6_p645_Byrne
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spelling paper:paper_00166707_v143_n6_p645_Byrne2023-06-08T14:38:33Z The role of river drainages in shaping the genetic structure of capybara populations Quintana, Rubén Darío Cassini, Marcelo Hernán Túnez, Juan Ignacio HVRI Hydrochoerus hydrochaeris Mitochondrial DNA River basins South America mitochondrial DNA animal Argentina flooding genetics Paraguay river rodent Venezuela Animals Argentina DNA, Mitochondrial Floods Paraguay Rivers Rodentia Venezuela The capybara, Hydrochoerus hydrochaeris, is an herbivorous rodent widely distributed throughout most of South American wetlands that lives closely associated with aquatic environments. In this work, we studied the genetic structure of the capybara throughout part of its geographic range in Argentina using a DNA fragment of the mitochondrial control region. Haplotypes obtained were compared with those available for populations from Paraguay and Venezuela. We found 22 haplotypes in 303 individuals. Hierarchical AMOVAs were performed to evaluate the role of river drainages in shaping the genetic structure of capybara populations at the regional and basin scales. In addition, two landscape genetic models, isolation by distance and isolation by resistance, were used to test whether genetic distance was associated with Euclidean distance (i.e. isolation by distance) or river corridor distance (i.e. isolation by resistance) at the basin scale. At the regional scale, the results of the AMOVA grouping populations by mayor river basins showed significant differences between them. At the basin scale, we also found significant differences between sub-basins in Paraguay, together with a significant correlation between genetic and river corridor distance. For Argentina and Venezuela, results were not significant. These results suggest that in Paraguay, the current genetic structure of capybaras is associated with the lack of dispersion corridors through permanent rivers. In contrast, limited structuring in Argentina and Venezuela is likely the result of periodic flooding facilitating dispersion. © 2015, Springer International Publishing Switzerland. Fil:Quintana, R.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cassini, M.H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Túnez, J.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166707_v143_n6_p645_Byrne http://hdl.handle.net/20.500.12110/paper_00166707_v143_n6_p645_Byrne
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic HVRI
Hydrochoerus hydrochaeris
Mitochondrial DNA
River basins
South America
mitochondrial DNA
animal
Argentina
flooding
genetics
Paraguay
river
rodent
Venezuela
Animals
Argentina
DNA, Mitochondrial
Floods
Paraguay
Rivers
Rodentia
Venezuela
spellingShingle HVRI
Hydrochoerus hydrochaeris
Mitochondrial DNA
River basins
South America
mitochondrial DNA
animal
Argentina
flooding
genetics
Paraguay
river
rodent
Venezuela
Animals
Argentina
DNA, Mitochondrial
Floods
Paraguay
Rivers
Rodentia
Venezuela
Quintana, Rubén Darío
Cassini, Marcelo Hernán
Túnez, Juan Ignacio
The role of river drainages in shaping the genetic structure of capybara populations
topic_facet HVRI
Hydrochoerus hydrochaeris
Mitochondrial DNA
River basins
South America
mitochondrial DNA
animal
Argentina
flooding
genetics
Paraguay
river
rodent
Venezuela
Animals
Argentina
DNA, Mitochondrial
Floods
Paraguay
Rivers
Rodentia
Venezuela
description The capybara, Hydrochoerus hydrochaeris, is an herbivorous rodent widely distributed throughout most of South American wetlands that lives closely associated with aquatic environments. In this work, we studied the genetic structure of the capybara throughout part of its geographic range in Argentina using a DNA fragment of the mitochondrial control region. Haplotypes obtained were compared with those available for populations from Paraguay and Venezuela. We found 22 haplotypes in 303 individuals. Hierarchical AMOVAs were performed to evaluate the role of river drainages in shaping the genetic structure of capybara populations at the regional and basin scales. In addition, two landscape genetic models, isolation by distance and isolation by resistance, were used to test whether genetic distance was associated with Euclidean distance (i.e. isolation by distance) or river corridor distance (i.e. isolation by resistance) at the basin scale. At the regional scale, the results of the AMOVA grouping populations by mayor river basins showed significant differences between them. At the basin scale, we also found significant differences between sub-basins in Paraguay, together with a significant correlation between genetic and river corridor distance. For Argentina and Venezuela, results were not significant. These results suggest that in Paraguay, the current genetic structure of capybaras is associated with the lack of dispersion corridors through permanent rivers. In contrast, limited structuring in Argentina and Venezuela is likely the result of periodic flooding facilitating dispersion. © 2015, Springer International Publishing Switzerland.
author Quintana, Rubén Darío
Cassini, Marcelo Hernán
Túnez, Juan Ignacio
author_facet Quintana, Rubén Darío
Cassini, Marcelo Hernán
Túnez, Juan Ignacio
author_sort Quintana, Rubén Darío
title The role of river drainages in shaping the genetic structure of capybara populations
title_short The role of river drainages in shaping the genetic structure of capybara populations
title_full The role of river drainages in shaping the genetic structure of capybara populations
title_fullStr The role of river drainages in shaping the genetic structure of capybara populations
title_full_unstemmed The role of river drainages in shaping the genetic structure of capybara populations
title_sort role of river drainages in shaping the genetic structure of capybara populations
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166707_v143_n6_p645_Byrne
http://hdl.handle.net/20.500.12110/paper_00166707_v143_n6_p645_Byrne
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