TY - JOUR T1 - Potential for genomic selection on feed efficiency in gilthead sea bream (Sparus aurata), based on individual feed conversion ratio, carcass and lipid traits A1 - Besson,Mathieu A1 - Rombout,Nicky A1 - Salou,Germain A1 - Vergnet,Alain A1 - Cariou,Sophie A1 - Bruant,Jean-Sébastien A1 - Izquierdo,Marisol A1 - Bestin,Anastasia A1 - Clota,Frederic A1 - Haffray,Pierrick A1 - Allal,Francois A1 - Vandeputte,Marc AD - Université Paris-Saclay, INRAE, AgroParisTech, GABI, Jouy-en-Josas, France AD - MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, INRAE, Palavas-les-Flots, France AD - SYSAAF Section Aquacole, Campus de Beaulieu, Rennes, France AD - Fermes Marine Du Soleil, La Brée Les Bains, France AD - Grupo de Investigación en Acuicultura, Universidad de Las Palmas de Gran Canaria, Las Palmas, Spain AD - MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, INRAE, Palavas-les-Flots, France UR - https://archimer.ifremer.fr/doc/00772/88359/ DO - 10.1016/j.aqrep.2022.101132 KW - Fine phenotyping KW - Selective breeding KW - Aquaculture KW - Genomic KW - Restricted feeding KW - Individual feed efficiency N2 - Genetic improvement of feed efficiency is key to improve the economic and environmental sustainability of fish farming. However, it requires individual phenotypes of feed efficiency, which are difficult if not impossible to obtain when fish are reared in tanks or cages. Here, we applied and validated on gilthead sea bream a method to evaluate individual feed efficiency based on individual rearing of fish in aquariums under restricted feeding. We collected individual phenotypes of feed efficiency in aquariums on 538 sea bream (average weight = 54.50 g). Based on these individual phenotypes, fish (average weight = 174.6 g) were reared in groups of divergent phenotypes (high or low feed efficiency), validating that individual feed efficiency had an impact on group feed efficiency at a later stage. All 538 fish, their parents as well as 794 sibs reared in cages in a production environment, were genotyped on a 57k SNP array to estimate genomic heritability and correlations between traits. We showed that feed efficiency was heritable but did not find significant associated QTLs. We also showed that feed efficiency was negatively genetically correlated to viscera yield, indicating that the most efficient fish had less viscera than the least efficient ones. Altogether, these results support that measuring individual feed efficiency in aquariums under restricted feeding may be used as a reliable phenotyping method to genetically improve feed efficiency, despite the bias intrinsically linked to individual rearing. Y1 - 2022/06 PB - Elsevier BV JF - Aquaculture Reports SN - 2352-5134 VL - 24 ID - 88359 ER -