ArticleBMC genetics2015
The frequency of spontaneous triploidy in farmed Atlantic salmon produced in Norway during the period 2007-2014.
Article in BMC genetics, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.
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19 citing papers in PubMed, 52 citations in OpenAlex.
- Maternal age and genome-wide failure of meiotic recombination are associated with triploid conceptions in humans.American journal of human genetics · 2025Article
- Limited inbreeding avoidance at the gamete level despite inbreeding depression in Atlantic salmon (Salmo salar).The Journal of animal ecology · 2025Article
- Effect of heterozygosity, ploidy and incubation temperature on post-cranial axial skeletal meristics and deformities in Atlantic salmon (Salmo salar).Journal of fish biology · 2025Article
- Chromosomal aberrations and early mortality in a non-mammalian vertebrate: example from pressure-induced triploid Atlantic salmon.Heredity · 2024Article
- Growth performance, reproductive status, and chromosomal instability in triploid Nile tilapias.Animal reproduction · 2024Article
- DNA extraction from recently fertilised Atlantic salmon embryos for use in microsatellite validation of triploidy.PloS one · 2023Article
- Cytogenetic investigation of Arctic char × brook trout FJournal of applied genetics · 2021Article
- Development of supermale and all-male Atlantic salmon to research the vgll3 allele - puberty link.BMC genetics · 2020Article
- Ploidy Levels and Fitness-Related Traits in Purebreds and Hybrids Originating from Sterlet (Genes · 2020Article
- Production and verification of the first Atlantic salmon (Salmo salar L.) clonal lines.BMC genetics · 2020Article
- Chromosome aberrations in pressure-induced triploid Atlantic salmon.BMC genetics · 2020Article
- Population genetic analysis reveals a geographically limited transition zone between two genetically distinct Atlantic salmon lineages in Norway.Ecology and evolution · 2019Article
- Investigating the frequency of triploid Atlantic salmon in wild Norwegian and Russian populations.BMC genetics · 2018Article
- Comparisons of reproductive function and fatty acid fillet quality between triploid and diploid farm Atlantic salmon (Royal Society open science · 2018Article
- Investigating the genetic and epigenetic basis of big biological questions with the parthenogenetic marbled crayfish: A review and perspectives.Journal of biosciences · 2018Review
- Ploidy elicits a whole-genome dosage effect: growth of triploid Atlantic salmon is linked to the genetic origin of the second maternal chromosome set.BMC genetics · 2017Article
- Article
- Salmonid fish: model organisms to study cardiovascular morphogenesis in conjoined twins?BMC developmental biology · 2016Article
- The second highest chromosome count among vertebrates is observed in cultured sturgeon and is associated with genome plasticity.Genetics, selection, evolution : GSE · 2016Article
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Authors and funding
9 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundSpontaneous triploidy has been reported in a number of fish species, and is often linked with in vivo or in vitro ageing of eggs post ovulation. Here, we provide the first investigation into the frequency of spontaneous triploidy in farmed Atlantic salmon by analysing more than 4000 fish from 55 farms, and approximately 1000 recaptured escapees, all sampled in the period 2007-2014. In addition, we compare microsatellite genotyping against flow cytometry and red blood cell diameter in a set of 45 putatively diploid and 45 putatively triploid Atlantic salmon.
resultsThe three methods implemented for ploidy determination gave consistent results, thus validating the methods used here. Overall, 2.0% spontaneous triploids were observed in salmon sampled on farms. The frequency of spontaneous triploids varied greatly among sea cages (0-28%), but they were observed in similar frequencies among the three primary breeding companies (1.8-2.4%). Spontaneous triploids were observed in all farming regions in Norway, and in all years sampled. Spontaneous triploids were also observed among the escapees recaptured in both the marine environment and in rivers.
conclusionsSpontaneous triploidy in commercially produced Atlantic salmon is likely to be a result of the practices employed by the industry. For logistical reasons, there is sometimes a pause of hours, and in some cases overnight, between killing the female broodfish, removal of her eggs, and fertilization. This gives the eggs time to age post ovulation, and increases the probability of duplication of the maternal chromosome set by inhibition of the second polar body release after normal meiosis II in the oocyte.
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