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<p>Monitoring levels of escaped farmed Atlantic salmon (<i>Salmo salar</i>) and the impacts of their interbreeding with wild populations is critical to inform conservation management. We detail here the first high-resolution Single Nucleotide Polymorphic (SNP) marker panel for the identification of escaped farm fish and farm/wild hybrids in wild Scottish salmon populations. Existing SNP sets were assessed and their SNPs ranked according to their ability to differentiate between farmed fish of Norwegian origin (the bulk of Scottish aquaculture production) and wild Scottish fish, without the potentially confounding influences of natural wild Scottish phylogeographic structure. The 74 top ranked SNPs from the sets were combined into the new bespoke panel that, using both fish of known origin and in silico generated hybrids, successfully allowed the accurate identification of farm, wild and hybrid fish. Thus the developed panel, for the first time, provides a molecular tool that can be exploited to provide accurate assessments of levels of farm to wild introgression in Scottish salmon rivers.</p>

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A SNP marker panel for identifying farmed Norwegian Atlantic salmon and quantifying introgression in wild Scottish populations

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • John Gilbey,
  • Eef Cauwelier,
  • James Sampayo,
  • Eric Verspoor,
  • David J. Morris

摘要

Monitoring levels of escaped farmed Atlantic salmon (Salmo salar) and the impacts of their interbreeding with wild populations is critical to inform conservation management. We detail here the first high-resolution Single Nucleotide Polymorphic (SNP) marker panel for the identification of escaped farm fish and farm/wild hybrids in wild Scottish salmon populations. Existing SNP sets were assessed and their SNPs ranked according to their ability to differentiate between farmed fish of Norwegian origin (the bulk of Scottish aquaculture production) and wild Scottish fish, without the potentially confounding influences of natural wild Scottish phylogeographic structure. The 74 top ranked SNPs from the sets were combined into the new bespoke panel that, using both fish of known origin and in silico generated hybrids, successfully allowed the accurate identification of farm, wild and hybrid fish. Thus the developed panel, for the first time, provides a molecular tool that can be exploited to provide accurate assessments of levels of farm to wild introgression in Scottish salmon rivers.