Fecha/hora: 07/06/2024 09:33:26

Biblioteca(s): 	INIA Treinta y Tres.	
Fecha corriente: 	29/04/2019	
Fecha de la última actualización: 	11/10/2019	
Autoria: 	MARESCA, S.; LÓPEZ VALIENTE, S.; RODRÍGUEZ A.M.; TESTA, L.M.; LONG, N. M.; QUINTANS, G.; PAVAN, E.	
Afiliación: 	SEBASTIÁN MARESCA, Instituto Nacional de Tecnología Agropecuaria, Cuenca del Salado Experimental Station. Argentina.; SEBASTIÁN LÓPEZ VALIENTE, Instituto Nacional de Tecnología Agropecuaria, Cuenca del Salado Experimental Station. Argentina.; ALEJANDRO M. RODRÍGUEZ, Instituto Nacional de Tecnología Agropecuaria, Cuenca del Salado Experimental Station. Argentina.; LAURA M. TESTA, Instituto Nacional de Tecnología Agropecuaria, Balcarse Experimental Station. Argentina.; NATHAN M. LONG, Department of Animal Veterinary Science, Clemson University, USA.; GRACIELA QUINTANS ILARIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; ENRIQUE PAVAN, Instituto Nacional de Tecnología Agropecuaria, Balcarse Experimental Station. Argentina.	
Título: 	The influence of protein restriction during mid- to late gestation on beef offspring growth, carcass characteristic and meat quality.	
Año de publicación: 	2019	
Fuente/Imprenta: 	Meat Science, 2019. v.153, p. 103-108.	
DOI: 	10.1016/j.meatsci.2019.03.014	
Idioma: 	Inglés	
Notas: 	Article history :Received 22 May 2018; Received in revised form 20 February 2019; Accepted 20 March 2019. Available online 21 March 2019.	
Contenido: 	Abstract:
The objective of this study was to determine whether crude protein intake during the last three months of gestation affects growth performance, carcass characteristics and meat quality of steer progeny. At 134 ± 14 d of gestation, 68 multiparous Angus cows were blocked by BW and expected calving date and randomly assigned to diets that contained either low or high dietary crude protein concentrations and were allotted in 12 pens per treatment. After calving, cows were managed together on improved pastures during lactation. After weaning at 219 ± 13 d of age, steers calves were stockered on natural pastures until 687 ± 13 d of age then placed into a feedlot for 83d before slaughter. Maternal dietary protein concentration had no influence on offspring body weight and growth rate during rearing or finishing phases (P > .10). Rib fat thickness of steers was not affected (P = .38) by maternal nutrition treatments, however, LM area was greater in HP steers than LP steers at entrance into the feedlot (P = .01) and end of finishing phase (P = .04). Hot carcass weight was similar between treatments (P = .69), however dressing percentage was increased in HP relative to LP steers (P = .01). Tenderness of Longissimus muscle was increased in HP compared to LP steers after 3 and 14d
(P < .001) of aging. No treatment differences in troponin-t degradation (P = .77) and collagen content (P = .58) were observed. Muscle fiber diameter was similar in LP and HP steers (P = .20), suggesting that increase of LM area in HP steers could be due to muscle hyperplasia. These data indicated that level of protein during mid to late gestation does not affect offspring growth but has impacts on carcass composition and meat quality of steer progeny.	
Palabras-Clave: 	RESTRICCIÓN NUTRICIONAL; RESTRICCIÓN PROTEICA; RESTRICCIONES EN GESTACIÓN.	
Thesagro: 	BOVINOS DE CARNE; GESTACION.	
Categoría del tema: 	L02 Alimentación animal	
Registro original: 	INIA Treinta y Tres (TT)	
Ejemplares: 	TT - (102750-1) - PXI - AP - DD - PP/MEAT-SCIENCE/2019/153/QUINTANS -  -  - DIS