Fecha/hora: 11/05/2024 20:33:39

Biblioteca(s): 	INIA Las Brujas.	
Fecha corriente: 	02/02/2022	
Fecha de la última actualización: 	02/02/2022	
Autoria: 	BRUNES, L.C.; BALDI, F.; COSTA, M.F.O.E.; QUINTANS, G.; BANCHERO, G.; LÔBO, R.B.; MAGNABOSCO, C.U.	
Afiliación: 	LUDMILLA C. BRUNES, Universidade Federal de Goiás, Departamento de Produção Animal, Rodovia Goiânia, Nova Veneza, Km 8, Campus Samambaia, 74690-900 Goiânia, GO, Brazi; FERNANDO BALDI, Universidade Estadual Paulista, Via de Acesso Prof. Paulo Donato Castellane, s/n, Campus Jaboticabal, 14884-900 Jaboticabal, SP, Brazil; MARCOS F. OLIVEIRA E COSTA, Embrapa Arroz e Feijão, Rodovia GO-462, Km 12, Fazenda Capivara, Zona Rural, 75375- 000 Santo Antônio de Goiás, GO, Brazil; GRACIELA QUINTANS ILARIA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; GEORGGET ELIZABETH BANCHERO HUNZIKER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; RAYSILDO B. LÔBO, Associação Nacional de Criadores e Pesquisadores, Rua João Godoy, 463, Jardim América, 14020-230 Ribeirão Preto, SP, Brazil; CLAUDIO U. MAGNABOSCO, Embrapa Cerrados, Rodovia BR-020, Km 18, 73310-970 Planaltina, DF, Brazil.	
Título: 	Early growth, backfat thickness and body condition has major effect on early heifer pregnancy in Nellore cattle.	
Año de publicación: 	2022	
Fuente/Imprenta: 	Anais da Academia Brasileira de Ciências, 2022, 94(1): e20191559. OPEN ACCESS. doi: https://doi.org/10.1590/0001-3765202120191559	
ISSN: 	0001-3765 (print); e-ISSN 1678-2690	
DOI: 	10.1590/0001-3765202120191559	
Idioma: 	Inglés	
Notas: 	Article history: Manuscript received on December 18, 2019; Accepted for publication on May 6, 2020.	
Contenido: 	ABSTRACT.- The aim was to evaluate the association between growth, carcass and visual scores traits with precocious calving in Nellore cattle. Birth weight (BW), weight at 120, 210, 365 and 450 days of age, pre and post-weaning average daily gain, rib eye area, backfat thickness (BF), rump fat thickness and visual scores obtained at 18 months were used for the analysis. Records from 700 females born between 2009 and 2015, exposed to mating starting at 11 months of age were analyzed. Discriminant analyzes were performed with the software Statistica. BW and BF showed the highest (P>0.01) discrimination value for early heifer pregnancy (EP). Extreme intrauterine growth retardation can result in slower growth, which reflects in the worst reproductive performance, confirmed by the variation in BW between precocious and conventional heifers. The results also demonstrate that the level of body fat affects begin of puberty. Bone structure, musculature, depth, tail insertion and rump scores presented the highest discrimination value for EP. These traits can be used as selection tools to improve sexual precocity in female Nellore cattle. The results obtained in this study would support farmers to guide the heifer management and decisions in order to enhance the EP.	
Palabras-Clave: 	Age at first conception; Carcass evaluation; Multivariate analyzes; Weight performance; Zebu.	
Categoría del tema: 	L10 Genética y mejoramiento animal	
URL: 	https://www.scielo.br/j/aabc/a/5HW8TfttbgMXdxkq767j8qC/?format=pdf&lang=en	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (102987-1) - PXI - AP - DD - PP/An. Acad. Bras. Ciênc./2022 -  -  - DIS