Distinct early life stage gene expression effects of hybridization among European and North American farmed and wild Atlantic salmon populations

Shahinur S. Islam, Xi Xue, Albert Caballero-Solares, Ian R. Bradbury, Matthew L. Rise, Ian A. Fleming

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

6 Citas (Scopus)

Resumen

Due to multigeneration domestication selection, farmed and wild Atlantic salmon diverge genetically, which raises concerns about potential genetic interactions among escaped farmed and wild populations and disruption of local adaptation through introgression. When farmed strains of distant geographic origin are used, it is unknown whether the genetic consequences posed by escaped farmed fish will be greater than if more locally derived strains are used. Quantifying gene transcript expression differences among divergent farmed, wild and F1 hybrids under controlled conditions is one of the ways to explore the consequences of hybridization. We compared the transcriptomes of fry at the end of yolk sac absorption of a European (EO) farmed (“StofnFiskur”, Norwegian strain), a North American (NA) farmed (Saint John River, NB strain), a Newfoundland (NF) wild population with EO ancestry, and related F1 hybrids using 44 K microarrays. Our findings indicate that the wild population showed greater transcriptome differences from the EO farmed strain than that of the NA farmed strain. We also found the largest differences in global gene expression between the two farmed strains. We detected the fewest differentially expressed transcripts between F1 hybrids and domesticated/wild maternal strains. We also found that the differentially expressed genes between cross types over-represented GO terms associated with metabolism, development, growth, immune response, and redox homeostasis processes. These findings suggest that the interbreeding of escaped EO/NA farmed and NF wild population would alter gene transcription, and the consequences of hybridization would be greater from escaped EO farmed than NA farmed salmon, resulting in potential effects on the wild populations.

Idioma originalEnglish
Páginas (desde-hasta)2712-2729
Número de páginas18
PublicaciónMolecular Ecology
Volumen31
N.º9
DOI
EstadoPublished - may. 2022
Publicado de forma externa

Nota bibliográfica

Funding Information:
This work was supported by a Strategic Project Grant from the Natural Sciences and Engineering Research Council of Canada (NSERC) and the Ocean Frontier Institute (OFI) through an award from the Canada First Research Excellence Fund.

Funding Information:
This work was supported by a Strategic Project Grant from the Natural Sciences and Engineering Research Council of Canada (NSERC) and the Ocean Frontier Institute (OFI) through an award from the Canada First Research Excellence Fund. Thanks to S. J. Lehnert for genetic information on the study populations, and to D. R. Saunders and C. M. Conway for technical help. Special thanks to J. R. Hall for the provision of additional primers that were originally developed by her within a Genome Canada Genomic Applications Partnership Programme (GAPP no. 6604) project. This experiment was carried out in accordance with the Memorial University institutional guidelines and was approved under Animal Care and Use Protocol (15-21-IF).

Publisher Copyright:
© 2022 John Wiley & Sons Ltd.

ASJC Scopus Subject Areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics

PubMed: MeSH publication types

  • Journal Article
  • Research Support, Non-U.S. Gov't

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