2026-04-17T17:04:04Zhttps://recercat.cat/oai/request

oai:recercat.cat:10459.1/704402024-12-05T22:12:14Zcom_2072_3622col_2072_479130

00925njm 22002777a 4500 dc Sánchez, J. P. author Reixach, Josep author Quintanilla Aguado, Raquel author Estany Illa, Joan author Ibáñez-Escriche, N. author Rothschild, Max Frederick author Piles, M. author 2021-02-04T11:27:09Z 2021-02-04T11:27:09Z 2015 This study reports estimates of the genetic correlations between feed efficiency (FE) components, ultimate pH (pH24), intramuscular content (IMF) and the selection criteria of the population: body weight (BW180) and back fat (BF180) at 180d. Average daily feed intake (FI), body weight (BW) and backfat thickness (BT) was weekly recorded from 15 to 26 weeks of age on 1076 pigs, and IMF and pH24 on 492 and 610 carcasses. FE components were defined from a random regression model for residual feed intake (RFI). The terms included were RFI per unit of metabolic weight (MBW), RFI per unit of ADG and an intercept, and for all these terms permanent and additive genetic effects were assumed. Individual variation in MBW is the only term having effect on RFI variation. High RFI intercept are associated with high content of intramuscular fat (0.41(0.10)) and low pH24 (-0.35(0.12)). The genetic correlation of RFI intercept with BF180 was 0.51(0.10), and that between RFI per unit of MBW and BW180 was -0.31(0.13); the genetic correlation between BF180 and BW180 was 0.63(0.01). These figures could make difficult the indirect improvement of FE through BF180 and BW180. Financiado por el proyecto RTA2011-00064-00-00, se han usado datos generados en los proyectos AGL2002-04271-C03-02 y CENIT MET-DEV-FUN. Parte del trabajo desarrollado en una estancia de J.P. Sánchez en ISU financiada por Excelmeat (IRSES-2009-246760). http://hdl.handle.net/10459.1/70440 Pigs Duroc Residual feed intake Meat quality Componentes de la eficiencia alimentaria en cerdos Duroc y su relación genética con la calidad de la carne Feed efficiency components and their relationship with meat quality traits in Duroc pigs