Heritability of cortisol response to confinement stress in European sea bass dicentrarchus labrax. | - CCMAR -

Journal Article

TitleHeritability of cortisol response to confinement stress in European sea bass dicentrarchus labrax.
Publication TypeJournal Article
AuthorsVolckaert, FAM, Hellemans, B, Batargias, C, Louro, B, Massault, C, Van Houdt, JKJ, Haley, C, de Koning, D-J, Canario, AVM
Year of Publication2012
JournalGenet Sel Evol
Volume44
Date Published2012 Jun 19
Pagination15
ISSN1297-9686
KeywordsAnimals, Bass, Body Weights and Measures, Female, Genetic Association Studies, Genetic Loci, Genotyping Techniques, Hydrocortisone, Male, Microsatellite Repeats, Multiplex Polymerase Chain Reaction, Pedigree, Phenotype, Quantitative Trait Loci, Stress, Physiological, Stress, Psychological
Abstract

BACKGROUND: In fish, the most studied production traits in terms of heritability are body weight or growth, stress or disease resistance, while heritability of cortisol levels, widely used as a measure of response to stress, is less studied. In this study, we have estimated heritabilities of two growth traits (body weight and length) and of cortisol response to confinement stress in the European sea bass.FINDINGS: The F1 progeny analysed (n = 922) belonged to a small effective breeding population with contributions from an unbalanced family structure of just 10 males and 2 females. Heritability values ranged from 0.54 (± 0.21) for body weight to 0.65 (± 0.22) for standard body length and were low for cortisol response i.e. 0.08 (± 0.06). Genetic correlations were positive (0.94) between standard body length and body weight and negative between cortisol and body weight and between cortisol and standard body length (-0.60 and -0.55, respectively).CONCLUSION: This study confirms that in European sea bass, heritability of growth-related traits is high and that selection on such traits has potential. However, heritability of cortisol response to stress is low in European sea bass and since it is known to vary greatly among species, further studies are necessary to understand the reasons for these differences.

DOI10.1186/1297-9686-44-15
Sapientia

http://www.ncbi.nlm.nih.gov/pubmed/22520515?dopt=Abstract

Alternate JournalGenet. Sel. Evol.
PubMed ID22520515
PubMed Central IDPMC3378454
Grant ListBBS/E/R/00001606 / / Biotechnology and Biological Sciences Research Council / United Kingdom
MC_PC_U127592696 / / Medical Research Council / United Kingdom
MC_U127592696 / / Medical Research Council / United Kingdom
/ / Biotechnology and Biological Sciences Research Council / United Kingdom