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Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
22/08/2017 |
Data da última atualização: |
22/08/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SOUZA-FABJAN, J. M. G.; ROSA, R. M. da; BALARO, M. F. A.; PINTO, P. H. N.; SANTOS, G. B. dos; ARASHIRO, E. K. N.; FONSECA, J. F. da; UNGERFELD, R.; BRANDÃO, F. Z. |
Afiliação: |
Joanna Maria Gonçalves Souza-Fabjan, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; Universidade do Grande Rio - Duque de Caxias, RJ, Brazil; Rômulo Mendonça da Rosa, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; Mário Felipe Alvarez Balaro, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; Pedro Henrique Nicolau Pinto, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; Gustavo Bervian dos Santos, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; Eduardo Kenji Nunes Arashiro, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil; JEFERSON FERREIRA DA FONSECA, CNPC; Rodolfo Ungerfeld, Universidad de la República - Montevideo, Uruguay; Felipe Zandonadi Brandão, Universidade Federal Fluminense (UFF) - Niterói, RJ, Brazil. |
Título: |
Effect of different hormonal combinations on follicular wave emergence and superovulatory response in sheep. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
Theriogenology, v. 103, p. 24-29, Nov. 2017. |
DOI: |
https://doi.org/10.1016/j.theriogenology.2017.07.036 |
Idioma: |
Inglês |
Conteúdo: |
Abstract: The aim of the present study was to compare hormonal treatments to induce and synchronize follicular wave emergence to improve the results of superovulatory (SOV) treatments in ewes. In Experiment 1 (n = 66), ewes were treated with a progesterone intravaginal implant plus a PGF2? analogue (group GP4), or with the same treatment plus estradiol benzoate (GP4+EB), a GnRH agonist (GP4+GnRH), or both, estradiol benzoate and a GnRH agonist (GP4+EB+GnRH) in a 2 × 2 factorial arrangement. Follicular wave emergence was determined by ultrasound. Follicular wave did not emerge during the studied period in 10 females (one from GP4, six from GP4+EB and three from GP4+EB+GnRH). Follicular emergence was less synchronized (P = 0.007) when estradiol was administered (GP4+EB: 103.6 ± 22.0 h), without any interaction with GnRH treatment (GP4+EB+GnRH: 80.1 ± 21.4 h, GP4+GnRH: 52.5 ± 8.7 h, GP4: 56.6 ± 10.4 h). Estradiol administration delayed the moment of follicular emergence (P = 0.007) and the follicular wave emergence moment in which follicular dominance was achieved (P = 0.009), without interactions between estradiol and GnRH in the moment of follicular wave emergence or dominance. In Experiment 2 (n = 22), two SOV protocols were compared: the best treatment of Experiment 1 (GP4) was used to synchronize follicular wave emergence, initiating the SOV treatment 2.5 days later; in the control treatment, SOV treatment started 80 h after a short-term protocol to synchronize ovulation (Gcontrol). The number of corpora lutea (CL) and the evaluation of the collected embryos were performed six days after estrus. Blood samples were collected daily for plasma progesterone determination. Although the number of CL was similar in Gcontrol (7.1 ± 1.0) and GP4 (6.9 ± 5.1), the number of structures and viable embryos recovered were greater in Gcontrol (P < 0.05). The occurrence of luteal premature regression was significantly greater in GP4 (60%) than in Gcontrol (8.3%). The use of GnRH agonist alone did not improve synchronization of follicular wave emergence. When EB was used (alone or associated) follicular wave emergence was less synchronized. The SOV protocol proposed had a similar ovarian response; however, it resulted in less transferable embryos. MenosAbstract: The aim of the present study was to compare hormonal treatments to induce and synchronize follicular wave emergence to improve the results of superovulatory (SOV) treatments in ewes. In Experiment 1 (n = 66), ewes were treated with a progesterone intravaginal implant plus a PGF2? analogue (group GP4), or with the same treatment plus estradiol benzoate (GP4+EB), a GnRH agonist (GP4+GnRH), or both, estradiol benzoate and a GnRH agonist (GP4+EB+GnRH) in a 2 × 2 factorial arrangement. Follicular wave emergence was determined by ultrasound. Follicular wave did not emerge during the studied period in 10 females (one from GP4, six from GP4+EB and three from GP4+EB+GnRH). Follicular emergence was less synchronized (P = 0.007) when estradiol was administered (GP4+EB: 103.6 ± 22.0 h), without any interaction with GnRH treatment (GP4+EB+GnRH: 80.1 ± 21.4 h, GP4+GnRH: 52.5 ± 8.7 h, GP4: 56.6 ± 10.4 h). Estradiol administration delayed the moment of follicular emergence (P = 0.007) and the follicular wave emergence moment in which follicular dominance was achieved (P = 0.009), without interactions between estradiol and GnRH in the moment of follicular wave emergence or dominance. In Experiment 2 (n = 22), two SOV protocols were compared: the best treatment of Experiment 1 (GP4) was used to synchronize follicular wave emergence, initiating the SOV treatment 2.5 days later; in the control treatment, SOV treatment started 80 h after a short-term protocol to synchronize ovulation (... Mostrar Tudo |
Palavras-Chave: |
GnRH; MOET; Oestrogens. |
Thesagro: |
Estradiol; Estrógeno; Gonadotrofina; Ovelha; Ovino; Reprodução animal; Superovulação. |
Thesaurus Nal: |
Benzoates; Embryo transfer; Ewes; Reproduction; Sheep; Superovulation. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 03449naa a2200421 a 4500 001 2074263 005 2017-08-22 008 2017 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.theriogenology.2017.07.036$2DOI 100 1 $aSOUZA-FABJAN, J. M. G. 245 $aEffect of different hormonal combinations on follicular wave emergence and superovulatory response in sheep.$h[electronic resource] 260 $c2017 520 $aAbstract: The aim of the present study was to compare hormonal treatments to induce and synchronize follicular wave emergence to improve the results of superovulatory (SOV) treatments in ewes. In Experiment 1 (n = 66), ewes were treated with a progesterone intravaginal implant plus a PGF2? analogue (group GP4), or with the same treatment plus estradiol benzoate (GP4+EB), a GnRH agonist (GP4+GnRH), or both, estradiol benzoate and a GnRH agonist (GP4+EB+GnRH) in a 2 × 2 factorial arrangement. Follicular wave emergence was determined by ultrasound. Follicular wave did not emerge during the studied period in 10 females (one from GP4, six from GP4+EB and three from GP4+EB+GnRH). Follicular emergence was less synchronized (P = 0.007) when estradiol was administered (GP4+EB: 103.6 ± 22.0 h), without any interaction with GnRH treatment (GP4+EB+GnRH: 80.1 ± 21.4 h, GP4+GnRH: 52.5 ± 8.7 h, GP4: 56.6 ± 10.4 h). Estradiol administration delayed the moment of follicular emergence (P = 0.007) and the follicular wave emergence moment in which follicular dominance was achieved (P = 0.009), without interactions between estradiol and GnRH in the moment of follicular wave emergence or dominance. In Experiment 2 (n = 22), two SOV protocols were compared: the best treatment of Experiment 1 (GP4) was used to synchronize follicular wave emergence, initiating the SOV treatment 2.5 days later; in the control treatment, SOV treatment started 80 h after a short-term protocol to synchronize ovulation (Gcontrol). The number of corpora lutea (CL) and the evaluation of the collected embryos were performed six days after estrus. Blood samples were collected daily for plasma progesterone determination. Although the number of CL was similar in Gcontrol (7.1 ± 1.0) and GP4 (6.9 ± 5.1), the number of structures and viable embryos recovered were greater in Gcontrol (P < 0.05). The occurrence of luteal premature regression was significantly greater in GP4 (60%) than in Gcontrol (8.3%). The use of GnRH agonist alone did not improve synchronization of follicular wave emergence. When EB was used (alone or associated) follicular wave emergence was less synchronized. The SOV protocol proposed had a similar ovarian response; however, it resulted in less transferable embryos. 650 $aBenzoates 650 $aEmbryo transfer 650 $aEwes 650 $aReproduction 650 $aSheep 650 $aSuperovulation 650 $aEstradiol 650 $aEstrógeno 650 $aGonadotrofina 650 $aOvelha 650 $aOvino 650 $aReprodução animal 650 $aSuperovulação 653 $aGnRH 653 $aMOET 653 $aOestrogens 700 1 $aROSA, R. M. da 700 1 $aBALARO, M. F. A. 700 1 $aPINTO, P. H. N. 700 1 $aSANTOS, G. B. dos 700 1 $aARASHIRO, E. K. N. 700 1 $aFONSECA, J. F. da 700 1 $aUNGERFELD, R. 700 1 $aBRANDÃO, F. Z. 773 $tTheriogenology$gv. 103, p. 24-29, Nov. 2017.
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3. | | TONIETTO, J.; FALCADE, I.; GUERRA, C. C.; ZANUS, M. C.; MELLO, L. M. R. de; BRUCH, K. L. A estruturação e o reconhecimento da Indicação de Procedência Campanha Gaúcha para vinhos. In: SILVEIRA, S. V. da; PROTAS, J. F. da S. (ed.). Vinhos finos da região da Campanha gaúcha: tecnologias para a vitivinicultura e para a estruturação de Indicação Geográfica. Bento Gonçalves, RS: Embrapa Uva e Vinho, dez. p. 53-80, 2021. (Embrapa Uva e Vinho. Documentos, 130). 27 p. Capítulo 2.Tipo: Capítulo em Livro Técnico-Científico |
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