Investigating the frequency of triploid Atlantic salmon in wild Norwegian and Russian populations
Abstract 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...
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ftdoajarticles:oai:doaj.org/article:30ec81a4175d4520a481f2240e538853 2023-05-15T15:30:31+02:00 Investigating the frequency of triploid Atlantic salmon in wild Norwegian and Russian populations Katarina M Jørgensen Vidar Wennevik Anne Grete Eide Sørvik Laila Unneland Sergey Prusov Fernando Ayllon Kevin A Glover 2018-10-01T00:00:00Z https://doi.org/10.1186/s12863-018-0676-x https://doaj.org/article/30ec81a4175d4520a481f2240e538853 EN eng BMC http://link.springer.com/article/10.1186/s12863-018-0676-x https://doaj.org/toc/1471-2156 doi:10.1186/s12863-018-0676-x 1471-2156 https://doaj.org/article/30ec81a4175d4520a481f2240e538853 BMC Genetics, Vol 19, Iss 1, Pp 1-9 (2018) Ploidy Trisomic Triploid Microsatellite Population Fish Genetics QH426-470 article 2018 ftdoajarticles https://doi.org/10.1186/s12863-018-0676-x 2022-12-31T00:16:41Z Abstract 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. Article in Journal/Newspaper Atlantic salmon Directory of Open Access Journals: DOAJ Articles Norway BMC Genetics 19 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ploidy Trisomic Triploid Microsatellite Population Fish Genetics QH426-470 |
spellingShingle |
Ploidy Trisomic Triploid Microsatellite Population Fish Genetics QH426-470 Katarina M Jørgensen Vidar Wennevik Anne Grete Eide Sørvik Laila Unneland Sergey Prusov Fernando Ayllon Kevin A Glover Investigating the frequency of triploid Atlantic salmon in wild Norwegian and Russian populations |
topic_facet |
Ploidy Trisomic Triploid Microsatellite Population Fish Genetics QH426-470 |
description |
Abstract 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. |
format |
Article in Journal/Newspaper |
author |
Katarina M Jørgensen Vidar Wennevik Anne Grete Eide Sørvik Laila Unneland Sergey Prusov Fernando Ayllon Kevin A Glover |
author_facet |
Katarina M Jørgensen Vidar Wennevik Anne Grete Eide Sørvik Laila Unneland Sergey Prusov Fernando Ayllon Kevin A Glover |
author_sort |
Katarina M Jørgensen |
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 |
publishDate |
2018 |
url |
https://doi.org/10.1186/s12863-018-0676-x https://doaj.org/article/30ec81a4175d4520a481f2240e538853 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
BMC Genetics, Vol 19, Iss 1, Pp 1-9 (2018) |
op_relation |
http://link.springer.com/article/10.1186/s12863-018-0676-x https://doaj.org/toc/1471-2156 doi:10.1186/s12863-018-0676-x 1471-2156 https://doaj.org/article/30ec81a4175d4520a481f2240e538853 |
op_doi |
https://doi.org/10.1186/s12863-018-0676-x |
container_title |
BMC Genetics |
container_volume |
19 |
container_issue |
1 |
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1766360964622450688 |