Você está no menu de acessibilidade

Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/2790
Título: 
Effect of breed and corpus luteum on pregnancy rate of bovine embryo recipients
Autor(es): 
Instituição: 
  • Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
  • UCDB Curso de Medicina Veterinária
  • UCDB Programa de Mestrado e Doutorado em Ciências Ambientais e Sustentabilidade Agropecuária
  • Universidade Estadual Paulista (UNESP)
ISSN: 
1516-3598
Resumo: 
The objective of this study was to evaluate pregnancy rates of recipients of different breed groups (Nellore and crossbreed), as well as the effects of size and type of the corpus luteum (CL) on plasmatic concentrations of progesterone and pregnancy rates of embryo recipients. A total of 152 heifers were synchronized with progesterone implants and on the day of embryo transfer, previously obtained by superovulation and frozen in ethylene glycol, the diameter and type of the corpus luteum (cavitary and compact) was measured and blood was collected for progesterone measurement. The pregnancy rate was 44.1%, with a diameter of corpus luteum higher in recipients that became pregnant (2.03±0.41) compared with non-pregnant ones (1.86±0.34 cm). Plasmatic concentrations of progesterone did not differ between pregnant (1.50±1.05) and non-pregnant (1.31±0.91 ng/mL) animals. The type of corpus luteum did not influence the pregnancy rates. Only Angus and crossbred Marchigiana differ among themselves in pregnancy rates (33.3 and 59.2%, respectively). The pregnancy probability was affected only by CL diameter, but not by P4 plasmatic concentration. Selection of the corpus luteum size at the time of embryo transfer is an important factor to increase pregnancy rates in recipients, and compact and cavitary corpora lutea do not influence the pregnancy rates of bovine embryo recipients. Nellore recipients have pregnancy rates that are satisfactory and comparable to crossbred (Bos taurus × Bos indicus) recipients.
Data de publicação: 
1-Set-2012
Citação: 
Revista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 41, n. 9, p. 2129-2133, 2012.
Duração: 
2129-2133
Publicador: 
Sociedade Brasileira de Zootecnia
Palavras-chaves: 
  • cavitary corpus luteum
  • Nellore
  • Progesterone
  • Ultrasound
Fonte: 
http://dx.doi.org/10.1590/S1516-35982012000900022
Endereço permanente: 
http://hdl.handle.net/11449/2790
Direitos de acesso: 
Acesso aberto
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/2790
Aparece nas coleções:Artigos, TCCs, Teses e Dissertações da Unesp

Não há nenhum arquivo associado com este item.
 

Itens do Acervo digital da UNESP são protegidos por direitos autorais reservados a menos que seja expresso o contrário.