Signatures of natural selection among lineages and habitats inOncorhynchus mykiss
Open Access
- 17 November 2011
- journal article
- research article
- Published by Wiley in Ecology and Evolution
- Vol. 2 (1), 1-18
- https://doi.org/10.1002/ece3.59
Abstract
Recent advances in molecular interrogation techniques now allow unprecedented genomic inference about the role of adaptive genetic divergence in wild populations. We used high-throughput genotyping to screen a genome-wide panel of 276 single nucleotide polymorphisms (SNPs) for the economically and culturally important salmonid Oncorhynchus mykiss. Samples included 805 individuals from 11 anadromous and resident populations from the northwestern United States and British Columbia, and represented two major lineages including paired populations of each life history within single drainages of each lineage. Overall patterns of variation affirmed clear distinctions between lineages and in most instances, isolation by distance within them. Evidence for divergent selection at eight candidate loci included significant landscape correlations, particularly with temperature. High diversity of two nonsynonymous mutations within the peptide-binding region of the major histocompatibility complex (MHC) class II (DAB) gene provided signatures of balancing selection. Weak signals for potential selection between sympatric resident and anadromous populations were revealed from genome scans and allele frequency comparisons. Our results suggest an important adaptive role for immune-related functions and present a large genomic resource for future studiesThis publication has 85 references indexed in Scilit:
- Flow regime, temperature, and biotic interactions drive differential declines of trout species under climate changeProceedings of the National Academy of Sciences of the United States of America, 2011
- Spawning Habitat and Geography Influence Population Structure and Juvenile Migration Timing of Sockeye Salmon in the Wood River Lakes, AlaskaTransactions of the American Fisheries Society, 2011
- Extent and scale of local adaptation in salmonid fishes: review and meta-analysisHeredity, 2011
- An assessment of the spatial scale of local adaptation in brown trout (Salmo trutta L.): footprints of selection at microsatellite DNA lociHeredity, 2011
- Arlequin suite ver 3.5: a new series of programs to perform population genetics analyses under Linux and WindowsMolecular Ecology Resources, 2010
- Scanning the genome for gene single nucleotide polymorphisms involved in adaptive population differentiation in white spruceMolecular Ecology, 2008
- Isolation of 15 single nucleotide polymorphisms from coastal steelhead, Oncorhynchus mykiss (Salmonidae)Molecular Ecology Resources, 2008
- genepop’007: a complete re‐implementation of the genepop software for Windows and LinuxMolecular Ecology Resources, 2008
- genalex 6: genetic analysis in Excel. Population genetic software for teaching and researchMolecular Ecology Notes, 2005
- The evolutionary ecology of the major histocompatibility complexHeredity, 2005