Single nucleotide polymorphisms to discriminate different classes of hybrid between wild Atlantic salmon and aquaculture escapees
Abstract Many wild Atlantic salmon ( Salmo salar ) populations are threatened by introgressive hybridization from domesticated fish that have escaped from aquaculture facilities. A detailed understanding of the hybridization dynamics between wild salmon and aquaculture escapees requires discriminati...
Published in: | Evolutionary Applications |
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Main Authors: | , , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2016
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Subjects: | |
Online Access: | http://dx.doi.org/10.1111/eva.12407 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feva.12407 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eva.12407 |
Summary: | Abstract Many wild Atlantic salmon ( Salmo salar ) populations are threatened by introgressive hybridization from domesticated fish that have escaped from aquaculture facilities. A detailed understanding of the hybridization dynamics between wild salmon and aquaculture escapees requires discrimination of different hybrid classes; however, markers currently available to discriminate the two types of parental genome have limited power to do this. Using a high‐density Atlantic salmon single nucleotide polymorphism ( SNP ) array, in combination with pooled‐sample allelotyping and an F st outlier approach, we identified 200 SNP s that differentiated an important Atlantic salmon stock from the escapees potentially hybridizing with it. By simulating multiple generations of wild–escapee hybridization, involving wild populations in two major phylogeographic lineages and a genetically diverse set of escapees, we showed that both the complete set of SNP s and smaller subsets could reliably assign individuals to different hybrid classes up to the third hybrid (F3) generation. This set of markers will be a useful tool for investigating the genetic interactions between native wild fish and aquaculture escapees in many Atlantic salmon populations. |
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