Detection of outlier loci and their utility for fisheries management.

摘要: Genetics-based approaches have informed fisheries management for decades, yet remain challenging to implement within systems involving recently diverged stocks or where gene flow persists. In such cases, genetic markers exhibiting locus-specific ('outlier') effects associated with divergent selection may provide promising alternatives loci that reflect genome-wide ('neutral') guiding management. Okanagan Lake kokanee (Oncorhynchus nerka), a fishery of conservation concern, exhibits two sympatric ecotypes adapted different reproductive environments; however, previous research demonstrated the limited utility neutral microsatellites assigning individuals. Here, we investigated efficacy an outlier-based approach by screening >11 000 expressed sequence tags linked and conducting genomic scans sampled across seven spawning sites. We identified eight outliers among 52 polymorphic detected ecotype-level divergence, whereas there was no evidence divergence at loci. Outlier exhibited highest self-assignment accuracy ecotype (92.1%), substantially outperforming 44 (71.8%). Results were robust among-sampling years, assignment mixed composition estimates individuals in 2010 mirroring baseline results. Overall, outlier constitute informing stocks, potential applications designating units broad range taxa.