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Title: Produção de embriões em ovinos Morada Nova e Somalis Brasileira
Other Titles: Embryo production in Morada Nova and Somalis Brasileira ewes
Authors: Brasil, Oscar Oliveira
Moreira, Nathalia Hack
Silva, Thiago Antonio Souza Nascimento
Silva, Bianca Damiani Marques
Nascimento, Normandes Vieira
Facó, Olivardo
Ramos, Alexandre Floriani
Assunto:: Ovulação
Embrião
Ovino - reprodução
Issue Date: Sep-2016
Publisher: Universidade Federal de Minas Gerais, Escola de Veterinária
Citation: BRASIL, O.O. et al. Produção de embriões em ovinos Morada Nova e Somalis Brasileira. Arquivo Brasileiro de Medicina Veterinária e Zootecnia, Belo Horizonte, v. 68, n. 5, p. 1390-1394, set./out. 2016. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000501390&lng=en&nrm=iso>. Acesso em: 9 mar. 2018. doi: http://dx.doi.org/10.1590/1678-4162-8428.
Abstract: Superovulatory response and embryo yield in 19 Morada Nova and 20 Somalis Brasileira ewes was analyzed. All animals were synchronized with the insertion of an intravaginal device (CIDR(r)) on Day 0, replaced by a new device on Day 7, which remained in place until Day 14 and superovulated with 133mg of porcine FSH (pFSH) in decreasing doses at 12h intervals from Day 12 until Day 15 of the treatment, and a single dose of equine chorionic gonadotropin (eCG, 200UI) on Day 14 (i.e., administered in CIDR removal). Fifty hours after CIDR(r) removal, females were inseminated by laparoscopy. All embryos were recovered by laparotomy 5 days after insemination. Sheep which responded to the superovulation protocol (P>0.05) included 74% of the Morada Nova ewes and 50% of the Somalis Brasileira ewes. Morada Nova showed better results (P<0.05) than Somalis Brasileira in number of ovulations (15.38 ± 5.24 vs. 10.56 ± 2.83), total structures (11.00 ± 7.55 vs. 3.33 ± 1.94) and embryo yields (6.79 ± 5.35 vs. 2.90 ± 2.18). Despite the high fertilization rate, degenerate embryo rate was high for both breeds, with an overall rate of 39% (57/145). In conclusion, superovulatory response and embryo yields in Morada Nova ewes were considered sufficient to justify the use of this procedure in genetic resources conservation programs. However, improvements to embryo quality and control of precocious regression of corpus luteum are necessary to produce better results in the MOET program, with minimal variations and maximum embryo yield in Morada Nova and Somalis Brasileira ewes.
Licença:: Arquivo Brasileiro de Medicina Veterinária e Zootecnia - Este é um artigo publicado em acesso aberto sob uma licença Creative Commons (CC BY 4.0). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000501390&lng=en&nrm=iso. Acesso em: 9 mar. 2018.
DOI: http://dx.doi.org/10.1590/1678-4162-8428
Appears in Collections:FAV - Artigos publicados em periódicos

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