Document Detail

Differences in transcription levels among wild, domesticated, and hybrid Atlantic salmon (Salmo salar) from two environments.
MedLine Citation:
PMID:  22519555     Owner:  NLM     Status:  Publisher    
Escaped domesticated individuals can introduce disadvantageous traits into wild populations due to both adaptive differences between population ancestors and human-induced changes during domestication. In contrast to their domesticated counterparts, some endangered wild Atlantic salmon populations encounter during their marine stage large amounts of suspended sediments, which may act as a selective agent. We used microarrays to elucidate quantitative transcriptional differences between a domesticated salmon strain, a wild population and their first-generation hybrids during their marine life stage, to describe transcriptional responses to natural suspended sediments, and to test for adaptive genetic variation in plasticity relating to a history of natural exposure or nonexposure to suspended sediments. We identified 67 genes differing in transcription level among salmon groups. Among these genes, processes related to energy metabolism and ion homoeostasis were over-represented, while genes contributing to immunity and actin-/myosin-related processes were also involved in strain differentiation. Domestic-wild hybrids exhibited intermediate transcription patterns relative to their parents for two-thirds of all genes that differed between their parents; however, genes deviating from additivity tended to have similar levels to those expressed by the wild parent. Sediments induced increases in transcription levels of eight genes, some of which are known to contribute to external or intracellular damage mitigation. Although genetic variation in plasticity did not differ significantly between groups after correcting for multiple comparisons, two genes (metallothionein and glutathione reductase) tended to be more plastic in response to suspended sediments in wild and hybrid salmon, and merit further examination as candidate genes under natural selection.
Paul V Debes; Eric Normandeau; Dylan J Fraser; Louis Bernatchez; Jeffrey A Hutchings
Related Documents :
22438245 - A microdeletion proximal of the critical deletion region is associated with mild wolf-h...
22628165 - Functional study of dextran-graft-poly((2-dimethyl amino)ethyl methacrylate) gene deliv...
22369035 - Maximum predictive power of the microarray-based models for clinical outcomes is limite...
22349025 - Heat-shock-mediated elimination of the nptii marker gene in transgenic apple (malus×dom...
22778095 - Identification of genes that contribute to the pathogenesis of invasive pneumococcal di...
2123295 - Adp ribosylation factor is an essential protein in saccharomyces cerevisiae and is enco...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-4-23
Journal Detail:
Title:  Molecular ecology     Volume:  -     ISSN:  1365-294X     ISO Abbreviation:  -     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-4-23     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9214478     Medline TA:  Mol Ecol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2012 Blackwell Publishing Ltd.
Department of Biology, Dalhousie University, LSC, 1355 Oxford Road, Halifax, NS B3H 4J1, Canada Département de Biologie, Université Laval, Pavillon Charles-Eugène-Marchand, 1030 Avenue de la Médecine, Québec City, QC G1V 0A6, Canada Department of Biology, Concordia University, 7141 Sherbrooke St. West, Montreal, QC H4B 1R6, Canada Centre for Ecological and Evolutionary Synthesis, Department of Biology, University of Oslo, P.O. Box 1066 Blindern, NO-0316 Oslo, Norway.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  In vivo sodium release and saltiness perception in solid lipoprotein matrices. 1. Effect of composit...
Next Document:  Recovery in a letter-by-letter reader: more efficiency at the expense of normal reading strategy.