The influence of protein restriction during mid- to late gestation on beef offspring growth, carcass characteristic and meat quality

Authors
Maresca, Sebastian; Lopez Valiente, Sebastian; Rodriguez, Alejandro Martin; Testa, Maria Laura; Long, Nathan M.; Quintans, Graciela I.; Pavan, Enrique
Publication Year
2019
Language
English
Format
article
Status
Published version
Description
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.
EEA Cuenca del Salado
Fil: Maresca, Sebastian. INTA. Estación Experimental Agropecuaria Cuenca del Salado; Argentina
Fil: Lopez Valiente, Sebastian. INTA. Estación Experimental Agropecuaria Cuenca del Salado; Argentina
Fil: Rodriguez, Alejandro Martin. INTA. Estación Experimental Agropecuaria Cuenca del Salado; Argentina
Fil: Testa, Maria Laura. INTA. Estación Experimental Agropecuaria Balcarce; Argentina
Fil: Long, Nathan M. Clemson University. Department of Animal and Veterinary Sciences; Estados Unidos
Fil: Quintans, Graciela I. Instituto Nacional de Investigación Agropecuaria (INIA); Uruguay
Fil: Pavan, Enrique. INTA. Estación Experimental Agropecuaria Balcarce; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Clemson University. Department of Animal and Veterinary Science; Estados Unidos
Source
Meat Science 153 : 103-108 (July 2019)
Subject
Ganado Bovino
Dietas Restrictas en Proteínas
Gestación
Carne de Res
Composición de la Canal
Calidad de la Carne
Cattle
Protein Restricted Diets
Pregnancy
Beef
Carcass Composition
Meat Quality
Access level
Restricted access
License
Repository
INTA Digital (INTA)
Institution
Instituto Nacional de Tecnología Agropecuaria
OAI Identifier
oai:localhost:20.500.12123/5185