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Novel RAD sequence data reveal a lack of genomic divergence between dietary ecotypes in a landlocked salmonid population

November 14, 2017

Preservation of heritable ecological diversity within species and populations is a key challenge for managing natural resources and wild populations. Salmonid fish are iconic and socio-economically important species for commercial, aquaculture, and recreational fisheries across the globe. Many salmonids are known to exhibit ecological divergence within species, including distinct feeding ecotypes within the same lakes. Here we used 5559 SNPs, derived from RAD sequencing, to perform population genetic comparisons between two dietary ecotypes of sockeye salmon (Oncorhynchus nerka) in Jo-Jo Lake, Alaska (USA). We tested the standing hypothesis that these two ecotypes are currently diverging as a result of adaptation to distinct dietary niches; results support earlier conclusions of a single panmictic population. The RAD sequence data revealed 40 new SNPs not previously detected in the species, and our sequence data can be used in future studies of ecotypic diversity in salmonid species.

Citation Information

Publication Year 2017
Title Novel RAD sequence data reveal a lack of genomic divergence between dietary ecotypes in a landlocked salmonid population
DOI 10.1007/s12686-017-0791-4
Authors Morten T. Limborg, Wesley Larson, Kyle Shedd, Lisa W. Seeb, James E. Seeb
Publication Type Article
Publication Subtype Journal Article
Series Title Conservation Genetics Resources
Index ID 70193557
Record Source USGS Publications Warehouse
USGS Organization Coop Res Unit Leetown

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