Fecha/hora: 30/05/2024 04:44:19

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.O.; RODRÍGUEZ, A.M.; LONG, N. M.; PAVAN, E.; QUINTANS, G.	
Afiliación: 	S. MARESCA, Instituto Nacional de Tecnología Agropecuaria. Estación Experimental Cuenca del Salado, Argentina.; S.O. 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.; N. M. LONG, Departamento de Ciencias Animales y Veterinarias, Universidad de Clemson, Carolina del Sur, Estados Unidos de América.; E. PAVAN, Instituto Nacional de Tecnología Agropecuaria. Estación Experimental Cuenca del Salado, Argentina.; GRACIELA QUINTANS ILARIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay.	
Título: 	Efecto de la restricción proteica de vacas durante la gestación tardía sobre el crecimiento posnatal, el metabolismo de glucosa - insulina y la concentración de IGF-1 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. 31-43.	
Série: 	(INIA Serie Técnica; 252)	
ISBN: 	978-9974-38-436-1	
ISSN: 	1688-9266	
Idioma: 	Español	
Contenido: 	ABSTRACT
The objective of this study was determine whether the amount of protein provided to cows during late gestation would affect postnatal growth and lead to changes on glucose, insulin and insulin-like growth factor concentrations. At 121 d 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) and were allotted in 12 pens per treatment. At calving, cows were managed together on improved pastures until weaning. Calves were weighed and body samples were taken at birth and each 30 d until weaning at 180 d of age. Body weight
at birth on HP progeny tended to be great than LP progeny (P =0.06). At birth, calves from LP dams had greater head circumference (P < 0.01), heart girth (P =0.01) and cannon bone circumference (P =0.02). However, head circumference /birth BW ratio (P =0.04), heart girth /birth BW ratio (P =0.01), body length /birth BW ratio (P =0.05) and height /birth BW ratio (P =0.01) was greater on LP calves. Body mass index was greater in HP calves (P =0.04). No differences were found on BW of calves at weaning, adjusted 205 d BW and ADG during lactation (P > 0.10). Glucose concentrations were greater on LP calves than HP calves from birth to weaning
(81.0 ± 1.5 vs. 76.4 ± 1.2 mg/dl; P < 0.001) without any change in insulin concentrations during preweaning growth (LP= 1.61 ± 0.04 ng/ml; HP= 1.61 ± 0.04 ng/ml; P > 0.10). Insulin- like growth factor concentrations were lower on LP calves at birth (P < 0.05) and similar to HP calves during postnatal growth
(P > 0.10). These data demonstrate that low protein during late gestation in bovine dams may affect fetal growth with proportional increasing of head circumference and low body mass index. Level of protein compromised glucose regulation in early life and affected the IGF-I concentration of newborn calves.	
Palabras-Clave: 	CRECIMIENTO POSNATAL; GESTATION; GLUCOSE METABOLISM; METABOLISMO DE GLUCOSA; POST-NATAL GROWTH; SUBNUTRICIÓN; UNDERNUTRITION.	
Thesagro: 	GESTACION.	
Categoría del tema: 	L53 Fisiología Animal - Reproducción	
URL: 	http://www.ainfo.inia.uy/digital/bitstream/item/13782/1/St-252-p-31-43-Maresca.pdf	
Registro original: 	INIA Treinta y Tres (TT)	
Ejemplares: 	TT - (102915-1) - INI - PL - DD - PP/INIA/ST/252/2019 -  - st-252 - DIS