Título:	Effect of food supplementation on in vitro embryo production and growth performance in prepubertal Nelore heifers.
Autoria:	TOLEDO, R. B. de FARIA, O A. C. de LEME, L. O. MAGNABOSCO, C. U. GUIMARÃES JÚNIOR, R. EIFERT, E. da C. SANTOS, I. R. DOS OLIVEIRA, R. V. DODE, M. A. N. MALAQUIAS, J. V. PIVATO, I. MARTINS, C. F.
Afiliação:	RICARDO BRAZ DE TOLEDO, UNIVERSIDADE DE BRASÍLIA; OTÁVIO AUGUSTO COSTA DE FARIA, UNIVERSIDADE DE BRASÍIA; LIGIANE OLIVEIRA LEME; CLÁUDIO ULHOA MAGNABOSCO; ROBERTO GUIMARÃES JUNIOR; EDUARDO DA COSTA EIFERT, CPAC; ISABELLA RODRIGUES DOS SANTOS; RODRIGO VIDAL OLIVEIRA, UNIVERISADE DE BRASÍLIA; MARGOT ALVES NUNES DODE, Cenargen; JUACI VITORIA MALAQUIAS, CPAC; IVO PIVATO, UNIVERSIDADE DE BRASÍLIA; CARLOS FREDERICO MARTINS, CPAC.
Ano de publicação:	2023
Referência:	Animal Biotechnology, v. 34, n. 7, 2023.
Conteúdo:	In vitro embryos production from prepubertal heifers can help contribute to breeding programs; however, strategies are necessary to increase their embryo production. The aim of this study was to investigate the effects of two nutritional plans on oocyte recovery, embryo production and growth performance of prepubertal Nelore heifers. Thirty-four Nelore heifers with age of 6.5&#8201;months were divided into two feeding treatments (NP1 and NP2). The NP1 diets served as the control and NP2 diets were formulated to contain an average of 1.22-fold more energy than NP1. After 3&#8201;months of supplementation, the animals underwent follicular aspiration (ovum pick-up, OPU) every 21&#8201;d for 3&#8201;months and embryos were produced in vitro. Wither height, chest depth, body weight and subcutaneous fat of animals were measured. The number of retrieved and viable oocytes per OPU were 1.49-fold and 1.42-fold greater in NP2 heifers (p&#8201;=&#8201;0.018 and p&#8201;=&#8201;0.049, respectively) than those in NP1 heifers. Heifers administered NP2 produced 29.7% blastocysts, a percentage higher than NP1 animals that produced 24.40% embryos (p&#8201;<&#8201;0.05). Consequently, females in the NP2 treatment showed improved body development. These results indicate a positive effect of a higher energy diet on assisted reproduction and body development in prepubertal heifers.
Thesagro:	Embrião Animal Programa de Nutrição Melhoramento Genético Animal
NAL Thesaurus:	In vitro fertilization Biotechnology Nutrition
Palavras-chave:	Produção in vidro Novilha Nelore Oócitos Suplementação alimentar
Digital Object Identifier:	https://doi.org/10.1080/10495398.2023.2279612
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPAC)