1. Dynamic response to weaning of two lines of pigs divergently selected on residual feed intake
- Author
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Muller, Nelly, Gilbert, Hélène, Robert, F., ROGER, L., Montagne, Lucile, Unité Expérimentale Porcs Rennes (UE PR), Institut National de la Recherche Agronomique (INRA), Génétique Physiologie et Systèmes d'Elevage (GenPhySE ), École nationale supérieure agronomique de Toulouse [ENSAT]-Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Vétérinaire de Toulouse (ENVT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Conseils et Compétences en Productions Animales (CCPA), Physiologie, Environnement et Génétique pour l'Animal et les Systèmes d'Elevage [Rennes] (PEGASE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), European Project: 613574,EC:FP7:KBBE,FP7-KBBE-2013-7-single-stage,PROHEALTH(2013), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Vétérinaire de Toulouse (ENVT), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT)-École nationale supérieure agronomique de Toulouse (ENSAT), Université de Toulouse (UT)-Université de Toulouse (UT), Groupe CCPA, ProdInra, Migration, and Sustainable intensive pig and poultry production - PROHEALTH - - EC:FP7:KBBE2013-12-01 - 2018-11-30 - 613574 - VALID
- Subjects
[SDV] Life Sciences [q-bio] ,[SDV.GEN]Life Sciences [q-bio]/Genetics ,[SDV.GEN.GA]Life Sciences [q-bio]/Genetics/Animal genetics ,[SDV]Life Sciences [q-bio] ,[INFO]Computer Science [cs] ,[SDV.GEN] Life Sciences [q-bio]/Genetics ,[SDV.GEN.GA] Life Sciences [q-bio]/Genetics/Animal genetics ,[INFO] Computer Science [cs] - Abstract
International audience; Breeding efficient pigs is a way to reduce dietary costs and environmental waste. However, optimisation of feed efficiency must not be linked to a decrease in the ability of animals to cope with challenges or stress, such as during the weaning period. This study aimed to characterize the response of two lines of pigs divergently selected for residual feed intake (RFI), an indicator of feed efficiency, calculated as the difference between observed and theoretical feed intake estimated from maintenance and production requirements. Animals of the RFI- line (- for under-consumption) are more efficient than animals from the RFI+ line (+ for overconsumption). Thirty six piglets from each line were weaned at 28 days of age and housed in individual pens. Their zootechnical performance and physiological characteristics were followed during three weeks. Piglets from the more efficient line (RFI-) appeared more affected by weaning during the first week than piglets from the RFI+ line. Daily feed intake and growth rate of pigs from the RFI- line were 65% and 25% lower (P
- Published
- 2016