Genome Biology and Evolution · 2022
Strong Parallel Differential Gene Expression Induced by Hatchery Rearing Weakly Associated with Methylation Signals in Adult Coho Salmon (O. kisutch)
In adult coho salmon from two rivers, the authors compare gene expression and DNA methylation according to a hatchery or wild origin. Expression differences persist after the marine phase. Their association with methylation remains weak: several mechanisms may contribute to these signatures.
- The question
- Do the molecular signatures of early hatchery rearing persist in adults returning to spawn?
- The approach
- Comparison of adult coho salmon from two river systems, by RNA-seq and whole-genome bisulfite sequencing.
- What the article brings
- Expression differences between origins are parallel in both rivers; their link with methylation is limited.
- The limits
- Methylation explains only a small part of the expression differences observed; other mechanisms may contribute. These signatures do not directly measure how fish perform in the wild.
Figures from the article
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