Article
 

Adaptive genetic markers discriminate migratory runs of Chinook salmon (Oncorhynchus tshawytscha) amid continued gene flow

Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/articles/8p58pf860

Descriptions

Attribute NameValues
Creator
Abstract
  • Neutral genetic markers are routinely used to define distinct units within species that warrant discrete management. Human-induced changes to gene flow however may reduce the power of such an approach. We tested the efficiency of adaptive versus neutral genetic markers in differentiating temporally divergent migratory runs of Chinook salmon (Oncorhynchus tshawytscha) amid high gene flow owing to artificial propagation and habitat alteration. We compared seven putative migration timing genes to ten microsatellite loci in delineating three migratory groups of Chinook in the Feather River, CA: offspring of fall-run hatchery broodstock that returned as adults to freshwater in fall (fall run), spring-run offspring that returned in spring (spring run), and fall-run offspring that returned in spring (FRS). We found evidence for significant differentiation between the fall and federally listed threatened spring groups based on divergence at three circadian clock genes (OtsClock1b, OmyFbxw11, and Omy1009UW), but not neutral markers. We thus demonstrate the importance of genetic marker choice in resolving complex life history types. These findings directly impact conservation management strategies and add to previous evidence from Pacific and Atlantic salmon indicating that circadian clock genes influence migration timing.
  • Keywords: conservation genetics, ecological genetics, captive populations, conservation biology, life history evolution, hybridization, population genetics, fisheries management
License
Resource Type
DOI
Date Available
Date Issued
Citation
  • O'Malley, K. G., Jacobson, D. P., Kurth, R., Dill, A. J. and Banks, M. A. (2013), Adaptive genetic markers discriminate migratory runs of Chinook salmon (Oncorhynchus tshawytscha) amid continued gene flow. Evolutionary Applications, 6: 1184–1194. doi:10.1111/eva.12095
Journal Title
Journal Volume
  • 6
Journal Issue/Number
  • 8
Rights Statement
Funding Statement (additional comments about funding)
  • This research was supported by the California Departmentof Water Resources.
Publisher
Peer Reviewed
Language
Replaces

Relationships

Parents:

This work has no parents.

Items

Thumbnail Title Date Uploaded Visibility Actions
file details O_MalleyKathleenFisheriesWildlifeAdaptiveGeneticMarkers.pdf 2017-07-26 Public Download