Fecha/hora: 15/06/2024 17:15:26

Biblioteca(s): | INIA Treinta y Tres.
Fecha corriente: | 11/11/2019
Fecha de la última actualización: | 13/11/2019
Autoria: | MARESCA, S.; LÓPEZ VALIENTE, S.; RODRÍGUEZ, A.M.; TESTA, L.M.; LONG, N.M.; QUINTANS, G.; PAVON, E.
Afiliación: | SEBASTIÁN MARESCA, Instituto Nacional de Tecnología Agropecuaria. Estación Experimental Cuenca del Salado, Argentina.; SEBASTIÁN LÓPEZ VALIENTE, Instituto Nacional de Tecnología Agropecuaria. Estación Experimental Cuenca del Salado, Argentina.; A.M. RODRÍGUEZ, Instituto Nacional de Tecnología Agropecuaria. Estación Experimental Cuenca del Salado, Argentina.; L.M. TESTA, Instituto Nacional de Tecnología Agropecuaria. Estación Experimental Balcarce, Argentina.; N.M. LONG, Departamento de Ciencias Animales y Veterinarias. Universidad de Clemson, Carolina del Sur, Estados Unidos de América.; GRACIELA QUINTANS ILARIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; E. PAVON, Instituto Nacional de Tecnología Agropecuaria, Estación Experimental Balcarce, Argentina.
Título: | Influencia de la restricción proteica en el último tercio de gestación sobre el crecimiento, características de carcasa y calidad de carne de la descendencia.
Año de publicación: | 2019
Fuente/Imprenta: | In: QUINTANS, G.; IEWDIUKOW, M. (Ed.). Primer Seminario Técnico de Programación Fetal. Montevideo (UY): INIA, 2019. p. 65-76.
Série: | (INIA Serie Técnica; 252)
ISSN: | 1688-9266
Idioma: | Español

Contenido:

ABSTRACT
The objective of this study was to determine whether crude protein intake during late gastation affect growth, carcass characteristics and meat quality of steer rogeny. At 134 ± 14 days prepartum, 68 multiparous Angus cows were blocked by BW and expected calving date and randomly assigned to low protein level (LP, 6% CP) or high protein level (HP, 12% CP). After calving, cows were managed together on improved pastures among lactation. After weaning at 219 ± 13 days of age, calves were managed on native pastures up to 687 ± 13 days of age and then placed in feedlot for 83 days before slaughter. Protein concentration on maternal diet had no influence
on BW and growth rate during rearing or finishing phases (P> 0.10). Rib fat thickness of the steers was not affected (P = 0.38) by maternal nutrition treatments, however, LM area was greater in HP steers than LP steers at feedlot entrance (P = 0.01) and at the end of the finish phase (P = 0.04). Hot carcass weight was similar between treatments (P = 0.69), however, dressing increased in HP in relation to LP steers (P = 0.01). Longissimus muscle tenderness increased in HP compared
to LP steers after 3 and 14 days (P<0.001) of maturation. No differences were observed in troponin-t degradation (P = 0.77) and collagen content (P = 0.58). The diameter of the muscle fibers was similar in LP and HP steers (P = 0.20), suggesting that the increase of LM area in HP steers could be due to muscle hyperplasia. These data indicated that the level of protein during medium to late gestation does not affect offspring growth, but has an impact on the carcass composition
and meat quality of the steers’.

Palabras-Clave: | COMPONENTES DE LA CANAL; CRECIMIENTO; DESCENDENCIA; PROGRAMACIÓN FETAL; SUBNUTRICIÓN.
Categoría del tema: | L53 Fisiología Animal - Reproducción
URL: | http://www.ainfo.inia.uy/digital/bitstream/item/13787/1/St-252-p-65-76-Maresca.pdf
Registro original: | INIA Treinta y Tres (TT)
Ejemplares: | TT - (102918-1) - INI - PL - DD - UY/INIA/ST/252/2019 -  - st-252 - DIS