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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. |
Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
09/06/2016 |
Data da última atualização: |
23/08/2017 |
Tipo da produção científica: |
Nota Técnica/Nota Científica |
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. |
Afiliação: |
Department of Pathology and Veterinary Clinic, Veterinary School, Fluminense Federal University (UFF) - Niteroi, RJ, Brazil; JEFERSON FERREIRA DA FONSECA, CNPC; Department of Pathology and Veterinary Clinic, Veterinary School, Fluminense Federal University (UFF) - Niteroi, RJ, Brazil; Department of Pathology and Veterinary Clinic, Veterinary School, Fluminense Federal University (UFF) - Niteroi, RJ, Brazil; Department of Animal Science, Veterinary School, Fluminense Federal University (UFF) - Niteroi, RJ, Brazil; Department of Pathology and Veterinary Clinic, Veterinary School, Fluminense Federal University (UFF) - Niteroi, RJ, Brazil; Department of Pathology and Veterinary Clinic, Veterinary School, Fluminense Federal University (UFF) - Niteroi, RJ, Brazil; Department of Pathology and Veterinary Clinic, Veterinary School, Fluminense Federal University (UFF) - Niteroi, RJ, Brazil. |
Título: |
Potential role for GnRH in the synchronization of follicular emergence before the superovulatory Day 0 protocol. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Domestic Animal Endocrinology, Stoneham, v. 54, p. 10-14, Jan. 2016. |
DOI: |
10.1016/j.domaniend.2015.07.002 |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
GnRH; Medroxyprogesterone acetate; MOET; Oestrus synchronization; Raça Santa Inês. |
Thesagro: |
Ciclo estral; Estradiol; Hormônio animal; Ovino; Ovulação; Progesterona; Sincronização do cio. |
Thesaurus Nal: |
Ovarian follicles; Ovulation; Progesterone; Sheep; Ultrasonography. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 03153naa a2200421 a 4500 001 2046656 005 2017-08-23 008 2016 bl uuuu u00u1 u #d 024 7 $a10.1016/j.domaniend.2015.07.002$2DOI 100 1 $aBALARO, M. F. A. 245 $aPotential role for GnRH in the synchronization of follicular emergence before the superovulatory Day 0 protocol.$h[electronic resource] 260 $c2016 520 $aAbstract: 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. 650 $aOvarian follicles 650 $aOvulation 650 $aProgesterone 650 $aSheep 650 $aUltrasonography 650 $aCiclo estral 650 $aEstradiol 650 $aHormônio animal 650 $aOvino 650 $aOvulação 650 $aProgesterona 650 $aSincronização do cio 653 $aGnRH 653 $aMedroxyprogesterone acetate 653 $aMOET 653 $aOestrus synchronization 653 $aRaça Santa Inês 700 1 $aFONSECA, J. F. da 700 1 $aBARBOSA, T. G. B. 700 1 $aSOUZA-FABJAN, J. M. G. 700 1 $aFIGUEIRA, L. M. 700 1 $aTEIXEIRA, T. A. 700 1 $aCARVALHEIRA, L. R. 700 1 $aBRANDÃO, F. Z. 773 $tDomestic Animal Endocrinology, Stoneham$gv. 54, p. 10-14, Jan. 2016.
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Embrapa Caprinos e Ovinos (CNPC) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Trigo. Para informações adicionais entre em contato com cnpt.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Trigo. |
Data corrente: |
02/08/2005 |
Data da última atualização: |
02/10/2019 |
Tipo da produção científica: |
Documentos |
Autoria: |
LINHARES, A. G.; ROSINHA, R. C. |
Afiliação: |
CNPT; CNPT. |
Título: |
A produção de semente de trigo no Brasil. |
Ano de publicação: |
2004 |
Fonte/Imprenta: |
Passo Fundo: Embrapa Trigo, 2004. |
Páginas: |
53 p. |
Série: |
(Embrapa Trigo. Documentos, 48). |
ISSN: |
1516-5582 |
Idioma: |
Português |
Conteúdo: |
As comissões estaduais de semente de trigo e o programa semente fiscalizada de trigo; Produção de semente genética; Produção de semente básica e certificada; Taxas de utilização de semente melhorada; Problemas associados à produção de semente; Qualidade da semente. |
Palavras-Chave: |
Brasil; Semente de trigo. |
Thesagro: |
Semente; Trigo. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00787nam a2200205 a 4500 001 1820543 005 2019-10-02 008 2004 bl uuuu 00u1 u #d 022 $a1516-5582 100 1 $aLINHARES, A. G. 245 $aA produção de semente de trigo no Brasil. 260 $aPasso Fundo: Embrapa Trigo$c2004 300 $a53 p. 490 $a(Embrapa Trigo. Documentos, 48). 520 $aAs comissões estaduais de semente de trigo e o programa semente fiscalizada de trigo; Produção de semente genética; Produção de semente básica e certificada; Taxas de utilização de semente melhorada; Problemas associados à produção de semente; Qualidade da semente. 650 $aSemente 650 $aTrigo 653 $aBrasil 653 $aSemente de trigo 700 1 $aROSINHA, R. C.
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