Analysis of stress-induced hepatic gene expression in rainbow trout (Oncorhynchus mykiss) selected for high- and low-responsiveness to stress
Pemmasani, Jhansi K.; Pottinger, Tom G.; Cairns, Michael T.. 2011 Analysis of stress-induced hepatic gene expression in rainbow trout (Oncorhynchus mykiss) selected for high- and low-responsiveness to stress. Comparative Biochemistry and Physiology. Part D, Genomics and Proteomics, 6 (4). 406-419. 10.1016/j.cbd.2011.09.001Full text not available from this repository.
The production and welfare of intensively reared fish would be improved by reducing stress responsiveness. One approach to achieving this goal is selective breeding utilizing stress-responsive genes as direct genetic markers of the desirable trait. As a first step in this process, microarray analysis has been carried out on liver tissues of rainbow trout selectively bred for high (HR) or low (LR) responsiveness to a stressor. Microarray hybridizations provided gene expression profiles for pooled samples of fish confined for 6 h, 24 h and 168 h and for individual fish (168 h only). 161 genes were shown to be differentially regulated in HR and LR fish during confinement exposure and eight of these gene expression profiles were validated by quantitative PCR. Genes of particular interest included intelectin-2 precursor which showed greater than 100-fold higher expression in HR fish compared to LR fish irrespective of whether the fish were confined or not; interferon inducible transmembrane protein 3 which was differentially stress-induced between the two lines; and hepatic pro-opiomelanocortin B (POMC B) which was upregulated during stress in HR fish but downregulated in LR fish. All these offer potential as direct markers of low stress responsiveness in a marker-assisted selection scheme.
|Programmes:||CEH Topics & Objectives 2009 onwards > Water|
|Additional Keywords:||fish, stress, aquaculture, selective breeding, time course, liver, microarray analysis, quantitative PCR, cortisol, genetic markers|
|NORA Subject Terms:||Biology and Microbiology
|Date made live:||08 Nov 2011 14:38|
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