Investigating the frequency of triploid Atlantic salmon in wild Norwegian and Russian populations
Background Fish may display variations in ploidy, including three sets of chromosomes, known as triploidy. A recent study revealed a frequency of ~ 2% spontaneous (i.e., non-intentional) triploidy in domesticated Atlantic salmon produced in Norwegian aquaculture in the period 2007–2014. In contrast,...
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ftunivbergen:oai:bora.uib.no:1956/19243 2023-05-15T15:30:30+02:00 Investigating the frequency of triploid Atlantic salmon in wild Norwegian and Russian populations Jørgensen, Katarina Mariann Wennevik, Vidar Sørvik, Anne Grete Eide Unneland, Laila Prusov, Sergey Ayllon, Fernando Glover, Kevin 2018-10-26T09:57:39Z application/pdf https://hdl.handle.net/1956/19243 https://doi.org/10.1186/s12863-018-0676-x eng eng BMC Genetics EC/FP7: 212529 urn:issn:1471-2156 https://hdl.handle.net/1956/19243 https://doi.org/10.1186/s12863-018-0676-x cristin:1623518 Attribution CC BY http://creativecommons.org/licenses/by/4.0/ Copyright The Author(s) 2018 BMC Genetics Ploidy Trisomic Triploid Microsatellite Population Fish Peer reviewed Journal article 2018 ftunivbergen https://doi.org/10.1186/s12863-018-0676-x 2023-03-14T17:41:20Z Background Fish may display variations in ploidy, including three sets of chromosomes, known as triploidy. A recent study revealed a frequency of ~ 2% spontaneous (i.e., non-intentional) triploidy in domesticated Atlantic salmon produced in Norwegian aquaculture in the period 2007–2014. In contrast, the frequency of triploidy in wild salmon populations has not been studied thus far, and in wild populations of other organisms, it has been very rarely studied. In population genetic data sets, individuals that potentially display chromosome abnormalities, such as triploids with three alleles, are typically excluded on the premise that they may reflect polluted or otherwise compromised samples. Here, we critically re-investigated the microsatellite genetic profile of ~ 6000 wild Atlantic salmon sampled from 80 rivers in Norway and Russia, to investigate the frequency of triploid individuals in wild salmon populations for the first time. Results We detected a single triploid salmon, and five individuals displaying three alleles at one of the loci, thus regarded as putatively trisomic. This gave an overall frequency of triploid and putatively trisomic individuals in the data set of 0.017 and 0.083% respectively. The triploid salmon was an adult female, and had spent 2 years in freshwater and 2 years in the sea. Conclusions We conclude that the frequency of naturally-occurring triploid Atlantic salmon in wild Norwegian and Russian populations is very low, and many-fold lower than the frequency of spontaneous triploids observed in aquaculture. Our results suggest that aquaculture rearing conditions substantially increase the probability of triploidy to develop, and/or permits greater survival of triploid individuals, in comparison to the wild. publishedVersion Article in Journal/Newspaper Atlantic salmon University of Bergen: Bergen Open Research Archive (BORA-UiB) Norway BMC Genetics 19 1 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Ploidy Trisomic Triploid Microsatellite Population Fish |
spellingShingle |
Ploidy Trisomic Triploid Microsatellite Population Fish Jørgensen, Katarina Mariann Wennevik, Vidar Sørvik, Anne Grete Eide Unneland, Laila Prusov, Sergey Ayllon, Fernando Glover, Kevin Investigating the frequency of triploid Atlantic salmon in wild Norwegian and Russian populations |
topic_facet |
Ploidy Trisomic Triploid Microsatellite Population Fish |
description |
Background Fish may display variations in ploidy, including three sets of chromosomes, known as triploidy. A recent study revealed a frequency of ~ 2% spontaneous (i.e., non-intentional) triploidy in domesticated Atlantic salmon produced in Norwegian aquaculture in the period 2007–2014. In contrast, the frequency of triploidy in wild salmon populations has not been studied thus far, and in wild populations of other organisms, it has been very rarely studied. In population genetic data sets, individuals that potentially display chromosome abnormalities, such as triploids with three alleles, are typically excluded on the premise that they may reflect polluted or otherwise compromised samples. Here, we critically re-investigated the microsatellite genetic profile of ~ 6000 wild Atlantic salmon sampled from 80 rivers in Norway and Russia, to investigate the frequency of triploid individuals in wild salmon populations for the first time. Results We detected a single triploid salmon, and five individuals displaying three alleles at one of the loci, thus regarded as putatively trisomic. This gave an overall frequency of triploid and putatively trisomic individuals in the data set of 0.017 and 0.083% respectively. The triploid salmon was an adult female, and had spent 2 years in freshwater and 2 years in the sea. Conclusions We conclude that the frequency of naturally-occurring triploid Atlantic salmon in wild Norwegian and Russian populations is very low, and many-fold lower than the frequency of spontaneous triploids observed in aquaculture. Our results suggest that aquaculture rearing conditions substantially increase the probability of triploidy to develop, and/or permits greater survival of triploid individuals, in comparison to the wild. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Jørgensen, Katarina Mariann Wennevik, Vidar Sørvik, Anne Grete Eide Unneland, Laila Prusov, Sergey Ayllon, Fernando Glover, Kevin |
author_facet |
Jørgensen, Katarina Mariann Wennevik, Vidar Sørvik, Anne Grete Eide Unneland, Laila Prusov, Sergey Ayllon, Fernando Glover, Kevin |
author_sort |
Jørgensen, Katarina Mariann |
title |
Investigating the frequency of triploid Atlantic salmon in wild Norwegian and Russian populations |
title_short |
Investigating the frequency of triploid Atlantic salmon in wild Norwegian and Russian populations |
title_full |
Investigating the frequency of triploid Atlantic salmon in wild Norwegian and Russian populations |
title_fullStr |
Investigating the frequency of triploid Atlantic salmon in wild Norwegian and Russian populations |
title_full_unstemmed |
Investigating the frequency of triploid Atlantic salmon in wild Norwegian and Russian populations |
title_sort |
investigating the frequency of triploid atlantic salmon in wild norwegian and russian populations |
publisher |
BMC Genetics |
publishDate |
2018 |
url |
https://hdl.handle.net/1956/19243 https://doi.org/10.1186/s12863-018-0676-x |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
BMC Genetics |
op_relation |
EC/FP7: 212529 urn:issn:1471-2156 https://hdl.handle.net/1956/19243 https://doi.org/10.1186/s12863-018-0676-x cristin:1623518 |
op_rights |
Attribution CC BY http://creativecommons.org/licenses/by/4.0/ Copyright The Author(s) 2018 |
op_doi |
https://doi.org/10.1186/s12863-018-0676-x |
container_title |
BMC Genetics |
container_volume |
19 |
container_issue |
1 |
_version_ |
1766360956890251264 |