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Parental thermal environment controls the offspring phenotype in Brook charr (Salvelinus fontinalis): insights from a transcriptomic study.

Description: Acclimation to high temperatures associated with global climatic change is a vital challenge for cold-adapted fishes such as brook charr (Salvelinus fontinalis). Environmental variation can potentially induce phenotypic changes that are inherited across generations via epigenetic mechanisms that may allow for adaptive rapid responses to changing conditions. Yet, our understanding of epigenetic mechanisms underlying transgenerational plasticity is still limited. In this study, we aimed to determine if epigenetic changes modulating gene expression modifications are associated with transgenerational plasticity. Adults brook charr were exposed to either cold (from 11.5°C in September to 3°C in December) or warm (from 13.5°C in September to 5°C in December) thermal profiles during sexual maturation. Families were produced using a replicated two-by-two breeding design. Eggs from each family were split in two batches, one incubated at 5 °C and the second one at 8°C. The same thermal conditions were maintained from hatching to yolk sac resorption. Using RNA sequencing from brain tissue, we obtained 7881 differentially expressed genes (DGE) between the warm and the cold parental thermal regime.

The data uploaded represent the raw data from the RNA sequencing of 67 samples. A total of 6.5 billion reads were sequenced, with an average of 97.4 million reads per sample. Our results reinforce the relevance of epigenetic inheritance in response to climate change. Such inheritance may be an important mechanism associated with buffering the effects of global warming in future generations of brook charr.
Authors: Banousse, Ghizlane; Université du Québec à Rimouski; ORCID iD 0009-0004-9769-5343
Normandeau, Eric; Université Laval; ORCID iD 0000-0003-2841-9391
Semeniuk, Christina; University of Windsor; ORCID iD 0000-0001-5115-9853
Bernatchez, Louis; Université Laval; ORCID iD 0000-0002-8085-9709
Audet, Céline; Université du Québec à Rimouski; ORCID iD 0000-0003-3366-210X
Keywords: RNA sequencing
Brook charr
Field of Research: 
Biological sciences
Conservation genetics
Publication Date: 2024-02-07
Publisher: Federated Research Data Repository / dépôt fédéré de données de recherche
Funder: Natural Sciences and Engineering Research Council of Canada; CREATE Program FishCAST; STPGP 521227-18
Resources Aquatiques Québec; Regroupement stratégique, Fonds de recherche du Québec-Nature et Technologie
Government of Canada; Genome Canada, the Ontario Genomics Institute, and Génome Québec; OGI-184
Geographic Coverage: 
Place Name
Station aquacole UQAR-ISMER
Province /
Province / Territory

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Access to this dataset is subject to the following terms:
Creative Commons Public Domain Dedication (CC0 1.0)
Banousse, G., Normandeau, E., Semeniuk, C., Bernatchez, L., Audet, C. (2024). Parental thermal environment controls the offspring phenotype in Brook charr (Salvelinus fontinalis): insights from a transcriptomic study.. Federated Research Data Repository.