Fecha/hora: 09/06/2024 16:53:36

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	29/03/2021	
Fecha de la última actualización: 	31/03/2021	
Autoria: 	PRAVIA, M.I.; NAVAJAS, E.; MACEDO, F.; CLARIGET, J.M.; LUZARDO, S.	
Afiliación: 	MARIA ISABEL PRAVIA NIN, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ELLY ANA NAVAJAS VALENTINI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; FERNANDO LIBER MACEDO, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JUAN MANUEL CLARIGET BRIZ, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; SANTIAGO FELIPE LUZARDO VILLAR, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.	
Título: 	Association between feed efficiency and carcass and meat quality traits in Hereford steers.	
Complemento del título: 	Volume Electronic Poster Session - Biology - Feed Intake and Efficiency 1, p. 604.	
Año de publicación: 	2018	
Fuente/Imprenta: 	In: Proceedings of the World Congress on Genetics Applied to Livestock Production, 11., Aotea Centre Auckland, New Zealand: WCGALP, ICAR, 11-16 feb 2018.	
Idioma: 	Inglés	
Notas: 	Acknowledgements: This work was supported by the Agencia Nacional de Investigación e Innovación (ANII) (grant RTS_1_2012_1_3489), Instituto Nacional de Investigación Agropecuaria (INIA), Sociedad de Criadores de Hereford (SCH), Instituto Nacional de Carnes (INAC), Instituto de Investigaciones Biológicas Clemente Estable (IIBCE) and Asociación Rural del Uruguay (ARU).	
Contenido: 	SUMMARY.
The association between residual feed intake (RFI) and growth, carcass and meat quality traits were investigated using 233 Hereford steers. Individual feed intake, body liveweight, average daily gain and ultrasound measurements were recorded during 70-d post-weaning period to calculate RFI. Steers were categorized into high efficient (<0.5 SD below the RFI mean; 72), medium (mid ± 0.5 SD; 85), and low efficient steers (>0.5 SD above the RFI mean; 76). After the feed intake test, steers grazed on sorghum pasture and oat with corn supplementation during summer and autumn and winter, respectively, until achieving the slaughter weight (with back fat thickness 6.35 mm). During the finishing phase, the efficient steers had some lighter weights (P<0.05) at the start of finishing but achieved the same slaughter weight (P<0.001). Average daily gains during finishing were similar among efficiency groups. No differences were found among groups on ultrasound measures except a slight difference on UBFAT at pre-slaughter between medium and lower efficient (P=0.009). No differences were found among RFI groups for any carcass or meat quality traits. Phenotypic correlations with RFI were close to zero for all traits. These results suggest that increasing feed efficiency by RFI does not lead to unfavorable effect on finishing performance, carcass and meat quality. Larger dataset will allow the estimation of genetic correlation among these traits and the prediction of genetic correlated responses. Keywords: Residual feed intake, beef cattle, growth, tenderness.	
Palabras-Clave: 	Beef cattle; Growth; Residual feed intake; Tenderness.	
Thesagro: 	ALIMENTACION ANIMAL; GANADO DE CARNE.	
Categoría del tema: 	L02 Alimentación animal	
URL: 	http://www.ainfo.inia.uy/digital/bitstream/item/15395/1/association-between-feed-efficiency-and-carcass-and-meat-quality-traits-hereford-steers.pdf	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (102556-1) - PXI - PC - DD - WCGALP/11/2018 -  -  - DIS