Data/hora: 08/06/2024 14:29:21

Biblioteca(s): 	Embrapa Gado de Leite.	
Data corrente: 	24/08/2023	
Data da última atualização: 	31/10/2023	
Autoria: 	OLIVEIRA, C. S.; ROSA, P. M. da S.; CAMARGO, A. J. dos R.; FERES, L. F.; SARAIVA, N. Z.; OLIVEIRA, L. Z.; CAMARGO, L. S. de A.	
Afiliação: 	CLARA SLADE OLIVEIRA, CNPGL; PAOLA MARIA DA SILVA ROSA; AGOSTINHO JORGE DOS REIS CAMARGO, Pesagro; LUIZ FERNANDO FERES, Universidade José do Rosário Vellano-Unifenas; NAIARA ZOCCAL SARAIVA, CNPGL; LETICIA ZOCCOLARO OLIVEIRA, Universidade Federal de Minas Gerais; LUIZ SERGIO DE ALMEIDA CAMARGO, CNPGL.	
Título: 	Outstanding Gir oocyte donors: how does individual factor affect in vitro embryo production efficiency?	
Ano de publicação: 	2023	
Fonte/Imprenta: 	Animal Science Journal, v. 94, e13862, 2023.	
DOI: 	https://doi.org/10.1111/asj.13862	
Idioma: 	Inglês	
Conteúdo: 	The oocyte donor plays a pivotal role in bovine in vitro embryo production (IVP) success. The individual factor affects blastocyst/oocyte ratio and determine the existence of outstanding performing animals. The aim of this study was to assess the extent of individual factor effect to IVP efficiency, in a population of Gir oocyte donors. Extreme (high or low IVP efficiency based on blastocyst/oocyte ratio) animals were selected out of a population of 250 oocyte donors (1,734 observations) to form high (>0.48, n = 40), average (0.17-0.48, n = 168), and low (<0.17, n = 42) efficiency donor groups. Cumulus-oocyte complex indicators (total number, IVF-grade number, and IVF-grade/total ratio) were lower (p < 0.05) in high efficiency donors. The number of blastocysts per OPU was analyzed for highest performing bull, and an increase (p < 0.05) in high efficiency donors and a decrease (p < 0.05) in low efficiency donors were noticed, compared to average efficiency donors. The number of pregnancies obtained per OPU was affected (p = 0.017) by donor?s efficiency (low: 0:600:09, average: 1:170:07, high: 2:570:26), being 4.3-fold higher in high than in low efficiency donors. We conclude that producing embryos from high efficiency blastocyst/oocyte ratio donors increases blastocyst and pregnancy numbers by OPU, being an important indicator for donor selection in IVP programs	
Palavras-Chave: 	Eficiência da PIV; Fertilização in vitro.	
Thesagro: 	Gado Gir; Reprodução Animal.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Gado de Leite (CNPGL)	
Exemplares: 	CNPGL - (26081-1) - UPC - AP - DD -  -  -  - DIS