Comparative genomics of rainbow trout ( Oncorhynchus mykiss ): Is the genetic architecture of migratory behavior conserved among populations?

Autor: Clare CI; Department of Biology Texas Christian University Fort Worth Texas USA., Nichols KM; Conservation Biology Division, Northwest Fisheries Science Center National Marine Fisheries Service, National Oceanic and Atmospheric Administration Seattle Washington USA., Thrower FP; Ted Stevens Marine Research Institute, Alaska Fisheries Science Center, NOAA Juneau Alaska USA., Berntson EA; Conservation Biology Division, Northwest Fisheries Science Center National Marine Fisheries Service, National Oceanic and Atmospheric Administration Seattle Washington USA., Hale MC; Department of Biology Texas Christian University Fort Worth Texas USA.
Jazyk: angličtina
Zdroj: Ecology and evolution [Ecol Evol] 2023 Jun 26; Vol. 13 (6), pp. e10241. Date of Electronic Publication: 2023 Jun 26 (Print Publication: 2023).
DOI: 10.1002/ece3.10241
Abstrakt: Rainbow trout ( Oncorhynchus mykiss ) are a partially migratory species wherein some individuals undergo long-distance anadromous migrations, and others stay as residents in their native freshwater streams. The decision to migrate is known to be highly heritable, and yet, the underlying genes and alleles associated with migration are not fully characterized. Here we used a pooled approach of whole-genome sequence data from migratory and resident trout of two native populations-Sashin Creek, Alaska and Little Sheep Creek, Oregon-to obtain a genome-wide perspective of the genetic architecture of resident and migratory life history. We calculated estimates of genetic differentiation, genetic diversity, and selection between the two phenotypes to locate regions of interest and then compared these associations between populations. We identified numerous genes and alleles associated with life history development in the Sashin Creek population with a notable area on chromosome 8 that may play a critical role in the development of the migratory phenotype. However, very few alleles appeared to be associated with life history development in the Little Sheep Creek system, suggesting population-specific genetic effects are likely important in the development of anadromy. Our results indicate that a migratory life history is not controlled by a singular gene or region but supports the idea that there are many independent ways for a migratory phenotype to emerge in a population. Therefore, conserving and promoting genetic diversity in migratory individuals is paramount to conserving these populations. Ultimately, our data add to a growing body of literature that suggests that population-specific genetic effects, likely mediated through environmental variation, contribute to life history development in rainbow trout.
Competing Interests: The authors declare that they do not have any conflicts of interest.
(© 2023 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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