Contrasting patterns of genetic diversity and divergence between landlocked and migratory populations of fish galaxias maculatus, evaluated through mitochondrial DNA sequencing and nuclear DNA microsatellites
Author
dc.contributor.author
Astorga, Marcela P.
Author
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Valenzuela, Andrea
Author
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Segovia, Nicolás I.
Author
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Poulin, Elie Albert
Author
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Vargas Chacoff, Luis
Author
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González Wevar, Claudio A.
Admission date
dc.date.accessioned
2022-07-25T16:27:17Z
Available date
dc.date.available
2022-07-25T16:27:17Z
Publication date
dc.date.issued
2022
Cita de ítem
dc.identifier.citation
Frontiers in Genetics May 2022 Volume 13 Article 854362
es_ES
Identifier
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10.3389/fgene.2022.854362
Identifier
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https://repositorio.uchile.cl/handle/2250/186934
Abstract
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Galaxias species are interesting biogeographic models due to their distribution and different types of life cycles, with migratory and landlocked populations. To obtain a better understanding of the genetic consequences of the Quaternary glacial cycles in Galaxias maculatus, in this work we compared landlocked and migratory populations collected in areas that were differentially affected by ice advances and retreats. We included nine populations of G. maculatus, four collected from lakes (landlocked) and five from their associated estuaries/rivers (migratory) in three estuary-lake systems across southern Chile. Genetic analyses were performed using the mitochondrial control region and nine microsatellite loci. Genetic diversity measured with both markers was significantly higher in migratory than in landlocked populations across the study area. The levels of genetic differentiation showed higher differentiation among lakes than estuaries. Genetic diversity was higher in migratory populations located in areas that were less impacted by ice during Quaternary glacial processes. These results may be the consequence of recent recolonization of small freshwater bodies following the Last Glacial Maximum (LGM). Finally, the greatest differentiation was observed in populations that were exposed to continental ice advances and retreats during the LGM. Thus, in the present work we corroborate a pattern of differentiation between lakes and estuaries, using mtDNA sequences and microsatellite nuclear markers. This pattern may be due to a combination of biological factors, i.e., resident non-migratory behaviour or landlocking and natal homing-in, as well as geological factors, i.e., Expansion-Contraction Quaternary glacial biogeographic processes.
es_ES
Patrocinador
dc.description.sponsorship
IEB, Universidad de Chile P05002 ICM
PFB 023
Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)
CONICYT FONDECYT 1110798
1151375
Fondap IDEAL program 15150003
Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)
CONICYT FONDECYT 1210787
ANID-Millenium Science Initiative-BASE
ANID - Programa Iniciativa Cientifica Milenio ICN2021_002
3120075
es_ES
Lenguage
dc.language.iso
en
es_ES
Publisher
dc.publisher
Frontiers Media
es_ES
Type of license
dc.rights
Attribution-NonCommercial-NoDerivs 3.0 United States
Contrasting patterns of genetic diversity and divergence between landlocked and migratory populations of fish galaxias maculatus, evaluated through mitochondrial DNA sequencing and nuclear DNA microsatellites