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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
09/06/2016 |
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Data da última atualização: |
10/01/2025 |
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Tipo da produção científica: |
Nota Técnica/Nota Científica |
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Autoria: |
BALARO, M. F. A.; FONSECA, J. F. da; BARBOSA, T. G. B.; SOUZA-FABJAN, J. M. G.; FIGUEIRA, L. M.; TEIXEIRA, T. A.; CARVALHEIRA, L. R.; BRANDÃO, F. Z. |
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Afiliação: |
FLUMINENSE FEDERAL UNIVERSITY; JEFERSON FERREIRA DA FONSECA, CNPC; FLUMINENSE FEDERAL UNIVERSITY; FLUMINENSE FEDERAL UNIVERSITY; FLUMINENSE FEDERAL UNIVERSITY; FLUMINENSE FEDERAL UNIVERSITY; FLUMINENSE FEDERAL UNIVERSITY; FLUMINENSE FEDERAL UNIVERSITY. |
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Título: |
Potential role for GnRH in the synchronization of follicular emergence before the superovulatory Day 0 protocol. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Domestic Animal Endocrinology, v. 54, p. 10-14, Jan. 2016. |
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DOI: |
10.1016/j.domaniend.2015.07.002 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The ability of gonadotropin-releasing hormone (GnRH) to synchronize ovulation and new follicular wave emergence before a "superovulatory Day 0" protocol was assessed in Santa Inês ewes. For estrus synchronization, a 60-mg medroxyprogesterone acetate sponge was inserted for 6 d. One day before sponge removal, 37.5-ug d-cloprostenol and 300 IU equine chorionic gonadotropin were injected intramuscularly (i.m.). After sponge removal, ewes were assigned to the following 3 groups: (1) GC-1 mL saline at 12 h (n = 10); (2) G24h-0.025-mg lecirelin (GnRH agonist) i.m. at 24 h (n = 10); or (3) G36h-0.025-mg lecirelin i.m. at 36 h (n = 9). Ovarian ultrasonography was conducted to assess follicular dynamics. Blood was collected to determine plasma concentrations of progesterone and estradiol. Females from G36h and GC had a greater (P < 0.05) estrous response than those from the G24h group (78.0 and 90.0 vs 0.0%, respectively). Ewes from G24h and G36h had earlier (P < 0.05) ovulation (48.0 ± 10.2 and 56.7 ± 5.7 h) compared with those from Gc (64.1 ± 9.7 h). The mean number of ovulations per ewe was greater (P < 0.05) in Gc (1.9 ± 0.6) and G36h (2.0 ± 1.0) than G24h (1.2 ± 0.4). Plasma concentrations of progesterone and estradiol differed over time. Follicular growth during the postovulatory day was affected (P < 0.05) by day of the estrus cycle as well as by the interaction (P < 0.05) of treatment and day of the estrus cycle. There was a larger (P < 0.05) population of medium follicles during the first 24 h after the ovulation in G24h compared with Gc, and there was an absence of large follicles in G36h between 36 and 72 h after ovulation. In conclusion, the use of GnRH agonist at 36 h more efficiently synchronized ovulation and promoted the absence of dominant follicles during early diestrus and may be used at the start of superovulatory treatment at 80 h in Santa Inês ewes. MenosAbstract: The ability of gonadotropin-releasing hormone (GnRH) to synchronize ovulation and new follicular wave emergence before a "superovulatory Day 0" protocol was assessed in Santa Inês ewes. For estrus synchronization, a 60-mg medroxyprogesterone acetate sponge was inserted for 6 d. One day before sponge removal, 37.5-ug d-cloprostenol and 300 IU equine chorionic gonadotropin were injected intramuscularly (i.m.). After sponge removal, ewes were assigned to the following 3 groups: (1) GC-1 mL saline at 12 h (n = 10); (2) G24h-0.025-mg lecirelin (GnRH agonist) i.m. at 24 h (n = 10); or (3) G36h-0.025-mg lecirelin i.m. at 36 h (n = 9). Ovarian ultrasonography was conducted to assess follicular dynamics. Blood was collected to determine plasma concentrations of progesterone and estradiol. Females from G36h and GC had a greater (P < 0.05) estrous response than those from the G24h group (78.0 and 90.0 vs 0.0%, respectively). Ewes from G24h and G36h had earlier (P < 0.05) ovulation (48.0 ± 10.2 and 56.7 ± 5.7 h) compared with those from Gc (64.1 ± 9.7 h). The mean number of ovulations per ewe was greater (P < 0.05) in Gc (1.9 ± 0.6) and G36h (2.0 ± 1.0) than G24h (1.2 ± 0.4). Plasma concentrations of progesterone and estradiol differed over time. Follicular growth during the postovulatory day was affected (P < 0.05) by day of the estrus cycle as well as by the interaction (P < 0.05) of treatment and day of the estrus cycle. There was a larger (P < 0.05) population of medium fo... Mostrar Tudo |
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Palavras-Chave: |
GnRH; Medroxyprogesterone acetate; MOET; Oestrus synchronization; Raça Santa Inês. |
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Thesagro: |
Ciclo estral; Estradiol; Hormônio animal; Ovino; Ovulação; Progesterona; Sincronização do cio. |
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Thesaurus Nal: |
Ovarian follicles; Ovulation; Progesterone; Sheep; Ultrasonography. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
null
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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| Registros recuperados : 5 | |
| 1. |  | FERRACINI, V. L.; QUEIROZ, S. C. do N. de; SOUZA, M. D. de; GOMES, M. A. F.; CERDEIRA, A. L.; RAMPAZZO, P.; BALDERRAMA, O. Tebuthiuron monitoring in sandy soils of the Guarany Aquifer recharge zone in southeastern Brazil. In: LATIN AMERICAN PESTICIDE RESIDUE WORKSHOP, 1., 2007, Santa Maria. Food and Environment: Book of Abstracts. Santa Maria: Universidade Federal de Santa Maria, 2007. p. 65.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 2. | | CERDEIRA, A. L.; SOUZA, M. D. de; QUEIROZ, S. C. do N. de; FERRACINI, V. L.; BOLONHEZI, D.; GOMES, M. A. F.; ROSA, M. A.; BALDERRAMA, O.; RAMPAZZO, P.; QUEIROZ, R. H. C.; FARJANI NETO, C.; MATALLO, M. B. Leaching and half-life of the herbicide tebuthiuron on a recharge area of Guarany aquifer in sugarcane fields in Brazil. Journal of Environmental Science and Health, Part B: Pesticides, Food Contaminants, and Agricultural Wastes, v. 42, p. 635-639, 2007.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 3. | | CERDEIRA, A. L.; SOUZA, M. D. de; FERRACINI, V. L.; QUEIROZ, S. C. do N. de; BOLONHEZI, D.; GOMES, M. A. F.; QUEIROZ, R. H. C.; BALDERRAMA, O.; RAMPAZZO, P. Effect of sugarcane coverage on the behavior of tebuthiuron in soil in Brazil. In: ANNUAL MISSISSIPPI WATER RESOURCES CONFERENCE, 36., 2006, Jackson. Proceedings... Jackson: Mississippi Sate University: Mississippi Water Resources Research Institute, 2006. p. 83-85.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 4. | | CERDEIRA, A. L.; SOUZA, M. D. de; FERRACINI, V. L.; QUEIROZ, S. C. do N. de; BOLONHEZI, D.; GOMES, M. A. F.; BALDERRAMA, O.; RAMPAZZO, P.; QUEIROZ, R. H. C.; MATALLO, M. B. Fate of tebuthiuron herbicide in a recharge area of Guarany Aquifer in sugarcane field in Brazil. In: CONGRESSO BRASILEIRO DE PLANTAS DANINHAS, 25., 2003, Brasília, DF. Trabalhos apresentados. Brasília, DF: SBCPD, 2006. p. 1-6.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| 5. | | CERDEIRA, A. L.; SOUZA, M. D. de; FERRACINI, V. L.; QUEIROZ, S. C. do N. de; BOLONHEZI, D.; GOMES, M. A. F.; QUEIROZ, R. H. C.; BALDERRAMA, O.; RAMPAZZO, P. Fate of tebuthiuron herbicide in a recharge area of Guarany Aquifer in sugarcane field in Brazil. In: ANNUAL MISSISSIPPI WATER RESOURCES CONFERENCE, 36., 2006, Jackson, Mississippi. 2006 Program and Abstracts. Jackson, Mississippi: GRI, 2006. p. 39.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Meio Ambiente. |
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| Registros recuperados : 5 | |
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