From the bare minimum : genetics and selection in populations founded by only a few parents
International audience Question: Genetic variation is expected to control the fate of populations colonizing new environments, because the amount and nature of this variation influences adaptation. Thus, it is generally expected that the ability of populations to colonize new environments is severel...
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ftunivnantes:oai:HAL:hal-01901382v1 2023-05-15T13:59:06+02:00 From the bare minimum : genetics and selection in populations founded by only a few parents Labonne, Jacques Kaeuffer, Renaud Gueraud, Francois Zhou, Mingsha Manicki, Aurélie Hendry, Andrew P. Ecologie Comportementale et Biologie des Populations de Poissons (ECOBIOP) Institut National de la Recherche Agronomique (INRA)-Université de Pau et des Pays de l'Adour (UPPA) Redpath Museum and Department of Biology McGill University = Université McGill Montréal, Canada French Polar Institute (IPEV) and Institut national de la recherche agronomique (INRA) 2016 https://hal.archives-ouvertes.fr/hal-01901382 en eng HAL CCSD Evolutionary Ecology, Ltd hal-01901382 https://hal.archives-ouvertes.fr/hal-01901382 PRODINRA: 349860 WOS: 000384803400002 ISSN: 1522-0613 EISSN: 1937-3791 Evolutionary Ecology Research https://hal.archives-ouvertes.fr/hal-01901382 Evolutionary Ecology Research, Evolutionary Ecology, Ltd, 2016, 17 (1), pp.21-34 http://www.evolutionary-ecology.com/ genetic variation heterozygosity invasion genetic variant inbreeding small population fish sea trout poisson salmo trutta kerguelen invasion biologique variation génétique hétérozygotie endogamie [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2016 ftunivnantes 2022-11-16T01:37:52Z International audience Question: Genetic variation is expected to control the fate of populations colonizing new environments, because the amount and nature of this variation influences adaptation. Thus, it is generally expected that the ability of populations to colonize new environments is severely compromised if the number of founding individuals is very few. Organisms: Brown trout (Salmo trutta) are native to the northern hemisphere, but have been widely introduced globally, including into the southern hemisphere. Times and places: We analysed two isolated populations of brown trout introduced in 1993 to the remote Kerguelen Islands in the sub-Antarctic region, each population being founded with the offspring of only a single mother, and with either only one or two fathers. Methods: Scale samples were collected in 2003 and 2010 and analysed using a set of 16 microsatellite markers. These data were used to calculate individual homozygosity level and variance in inbreeding. The association between age (estimated through scale reading) and homozygosity level was used to assess the potential consequences of low genetic variation for individual survival. Results: The two populations represented different outcomes. In one population, variance in inbreeding was high and a clear heterozygosity–fitness correlation (HFC) was evident: older individuals were less homozygous than younger individuals. Consistent with these results, homozygosity level in this population decreased from 2003 to 2010. In the other population, variance in inbreeding was low, no consistent HFC was detected, and no decline in homozygosity level was evident from 2003 to 2010. Low genetic variation and severe initial bottlenecks through founding effects did not prevent the establishment and success of these populations, one of which appears to be actively purging inbred individuals. Article in Journal/Newspaper Antarc* Antarctic Kerguelen Islands Université de Nantes: HAL-UNIV-NANTES Antarctic Kerguelen Kerguelen Islands |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
genetic variation heterozygosity invasion genetic variant inbreeding small population fish sea trout poisson salmo trutta kerguelen invasion biologique variation génétique hétérozygotie endogamie [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
genetic variation heterozygosity invasion genetic variant inbreeding small population fish sea trout poisson salmo trutta kerguelen invasion biologique variation génétique hétérozygotie endogamie [SDE.BE]Environmental Sciences/Biodiversity and Ecology Labonne, Jacques Kaeuffer, Renaud Gueraud, Francois Zhou, Mingsha Manicki, Aurélie Hendry, Andrew P. From the bare minimum : genetics and selection in populations founded by only a few parents |
topic_facet |
genetic variation heterozygosity invasion genetic variant inbreeding small population fish sea trout poisson salmo trutta kerguelen invasion biologique variation génétique hétérozygotie endogamie [SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience Question: Genetic variation is expected to control the fate of populations colonizing new environments, because the amount and nature of this variation influences adaptation. Thus, it is generally expected that the ability of populations to colonize new environments is severely compromised if the number of founding individuals is very few. Organisms: Brown trout (Salmo trutta) are native to the northern hemisphere, but have been widely introduced globally, including into the southern hemisphere. Times and places: We analysed two isolated populations of brown trout introduced in 1993 to the remote Kerguelen Islands in the sub-Antarctic region, each population being founded with the offspring of only a single mother, and with either only one or two fathers. Methods: Scale samples were collected in 2003 and 2010 and analysed using a set of 16 microsatellite markers. These data were used to calculate individual homozygosity level and variance in inbreeding. The association between age (estimated through scale reading) and homozygosity level was used to assess the potential consequences of low genetic variation for individual survival. Results: The two populations represented different outcomes. In one population, variance in inbreeding was high and a clear heterozygosity–fitness correlation (HFC) was evident: older individuals were less homozygous than younger individuals. Consistent with these results, homozygosity level in this population decreased from 2003 to 2010. In the other population, variance in inbreeding was low, no consistent HFC was detected, and no decline in homozygosity level was evident from 2003 to 2010. Low genetic variation and severe initial bottlenecks through founding effects did not prevent the establishment and success of these populations, one of which appears to be actively purging inbred individuals. |
author2 |
Ecologie Comportementale et Biologie des Populations de Poissons (ECOBIOP) Institut National de la Recherche Agronomique (INRA)-Université de Pau et des Pays de l'Adour (UPPA) Redpath Museum and Department of Biology McGill University = Université McGill Montréal, Canada French Polar Institute (IPEV) and Institut national de la recherche agronomique (INRA) |
format |
Article in Journal/Newspaper |
author |
Labonne, Jacques Kaeuffer, Renaud Gueraud, Francois Zhou, Mingsha Manicki, Aurélie Hendry, Andrew P. |
author_facet |
Labonne, Jacques Kaeuffer, Renaud Gueraud, Francois Zhou, Mingsha Manicki, Aurélie Hendry, Andrew P. |
author_sort |
Labonne, Jacques |
title |
From the bare minimum : genetics and selection in populations founded by only a few parents |
title_short |
From the bare minimum : genetics and selection in populations founded by only a few parents |
title_full |
From the bare minimum : genetics and selection in populations founded by only a few parents |
title_fullStr |
From the bare minimum : genetics and selection in populations founded by only a few parents |
title_full_unstemmed |
From the bare minimum : genetics and selection in populations founded by only a few parents |
title_sort |
from the bare minimum : genetics and selection in populations founded by only a few parents |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.archives-ouvertes.fr/hal-01901382 |
geographic |
Antarctic Kerguelen Kerguelen Islands |
geographic_facet |
Antarctic Kerguelen Kerguelen Islands |
genre |
Antarc* Antarctic Kerguelen Islands |
genre_facet |
Antarc* Antarctic Kerguelen Islands |
op_source |
ISSN: 1522-0613 EISSN: 1937-3791 Evolutionary Ecology Research https://hal.archives-ouvertes.fr/hal-01901382 Evolutionary Ecology Research, Evolutionary Ecology, Ltd, 2016, 17 (1), pp.21-34 http://www.evolutionary-ecology.com/ |
op_relation |
hal-01901382 https://hal.archives-ouvertes.fr/hal-01901382 PRODINRA: 349860 WOS: 000384803400002 |
_version_ |
1766267480311857152 |