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Mapping QTLs affecting Cortisol Response to Confinement Stress in Rainbow Trout

Quillet, E.; Krieg, F.; Dechamp, N.; Hervet, C.; Le Roy, P.; Pottinger, T.G.. 2010 Mapping QTLs affecting Cortisol Response to Confinement Stress in Rainbow Trout. [Poster] In: 9th World Congress on Genetics Applied to Livestock Production, Leipzig, Germany, 1-6 August 2010.

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Abstract/Summary

A QTL design was implemented to investigate the genetic architecture of variation in the plasma cortisol response to an acute confinement stressor. About 1000 F2 progeny (5 full-sib families) were produced from a cross between F0 grand-parents previously selected for two generations for a high or a low cortisol response after a standardized confinement stress. Plasma cortisol concentrations were recorded on 15 month-old juveniles after two successive rounds of confinement stress challenge, at one month interval. Overall, eight and five QTLs (P<0.10) were identified for plasma cortisol concentration after the first and second challenge respectively. The most significant QTLs (P<0.05) were not the same in the two challenges. The results agree with previous studies reporting genetic variation for cortisol response after exposure to a stressor, but emphasize that response to stress is a highly complex trait, and that plasma cortisol may reflect a range of underlying physiological mechanisms.

Item Type: Publication - Conference Item (Poster)
Programmes: CEH Topics & Objectives 2009 onwards > Water > WA Topic 2 - Ecohydrological Processes > WA - 2.1 - Identify and quantify sources, fluxes and pathways of water, chemicals ...
CEH Sections: Parr
Additional Information. Not used in RCUK Gateway to Research.: Poster Session 4. PP4-118
Additional Keywords: stress, quantitative trait locus, aquaculture, selective breeding
NORA Subject Terms: Biology and Microbiology
Zoology
Date made live: 17 Nov 2010 12:37
URI: http://nora.nerc.ac.uk/id/eprint/9376

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