| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Caprinos e Ovinos; Embrapa Gado de Leite. |
|
Data corrente: |
21/05/2010 |
|
Data da última atualização: |
15/02/2024 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
VIANA, J. H. M.; PALHÃO, M. P.; SIQUEIRA, L. G. B.; FONSECA, J. F. da; CAMARGO, L. S. de A. |
|
Afiliação: |
JOAO HENRIQUE MOREIRA VIANA, CNPGL; M. P. PALHÃO, UFV; LUIZ GUSTAVO BRUNO SIQUEIRA, CNPGL; JEFERSON FERREIRA DA FONSECA, CNPC; LUIZ SERGIO DE ALMEIDA CAMARGO, CNPGL. |
|
Título: |
Ovarian follicular dynamics, follicle deviation, and oocyte yield in Gyr breed (Bos indicus) cows undergoing repeated ovum pick-up. |
|
Ano de publicação: |
2010 |
|
Fonte/Imprenta: |
Theriogenology, v. 73, n. 7, p. 966-972, 2010. |
|
DOI: |
https://doi.org/10.1016/j.theriogenology.2009.11.025 |
|
Idioma: |
Inglês |
|
Conteúdo: |
The objective of this study was to evaluate ovarian follicular dynamics during intervals between successive ovum pick-up (OPU) and determine its effects on the number and quality of recovered cumulus-oocyte complexes (COCs) in Zebu cows (Bos indicus). Pluriparous nonlactating Gyr cows (Bos indicus; n = 10) underwent four consecutive OPU sessions at 96-h intervals. The dynamics of ovarian follicular growth between OPU sessions was monitored by twice-daily ultrasonographic examinations. A single dominant follicle (DF) or two codominant (CDF) follicles (>9 mm) were present in 63.3% (19 of 30) of intervals studied, with follicle deviation beginning when the future dominant follicle (F1) achieved a diameter of 6.2 0.3 mm. The phenomenon of codominance was observed in four (13.3%) of the inter-OPU intervals. The remaining intervals (36.6%, 11 of 30) were characterized by a greater follicular population, lower rate of follicular growth, and a smaller diameter F1 (P < 0.0001). There was a tendency (P = 0.08) toward an increase in the number of recovered COCs when dominant follicles were not present (NDF). The quality of COCs was not affected by the presence of a single dominant follicle, but codominant follicles resulted in recovery of a lower proportion of viable embryos (40.0%, 62.1%, and 63.6%; P < 0.05) and higher proportions of degenerate COCs (56.0%, 30.3%, and 28.6%; P < 0.05) for CDF, NDF, and DF respectively.We concluded that, in Zebu cows, (a) repeated follicle spirations altered ovarian follicular dynamics, perhaps by increasing follicular growth rate; (b) follicular dominance could be established in cows undergoing twice-a-week OPU; and (c) the presence of a dominant follicle during short inter-OPU intervals may not affect COC quality, except when a codominant follicle was present. # 2010 Elsevier Inc. All rights reserved. MenosThe objective of this study was to evaluate ovarian follicular dynamics during intervals between successive ovum pick-up (OPU) and determine its effects on the number and quality of recovered cumulus-oocyte complexes (COCs) in Zebu cows (Bos indicus). Pluriparous nonlactating Gyr cows (Bos indicus; n = 10) underwent four consecutive OPU sessions at 96-h intervals. The dynamics of ovarian follicular growth between OPU sessions was monitored by twice-daily ultrasonographic examinations. A single dominant follicle (DF) or two codominant (CDF) follicles (>9 mm) were present in 63.3% (19 of 30) of intervals studied, with follicle deviation beginning when the future dominant follicle (F1) achieved a diameter of 6.2 0.3 mm. The phenomenon of codominance was observed in four (13.3%) of the inter-OPU intervals. The remaining intervals (36.6%, 11 of 30) were characterized by a greater follicular population, lower rate of follicular growth, and a smaller diameter F1 (P < 0.0001). There was a tendency (P = 0.08) toward an increase in the number of recovered COCs when dominant follicles were not present (NDF). The quality of COCs was not affected by the presence of a single dominant follicle, but codominant follicles resulted in recovery of a lower proportion of viable embryos (40.0%, 62.1%, and 63.6%; P < 0.05) and higher proportions of degenerate COCs (56.0%, 30.3%, and 28.6%; P < 0.05) for CDF, NDF, and DF respectively.We concluded that, in Zebu cows, (a) repeated follicle spirations ... Mostrar Tudo |
|
Palavras-Chave: |
Brasil; Dinâmica folicular; Folículo; Follicle ablation; OPU; Ovarian follicle; Ovarian follicular development; Zebu cattle. |
|
Thesagro: |
Ciclo estral; Endocrinologia; Gado; Reprodução animal. |
|
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
|
Marc: |
LEADER 02867naa a2200325 a 4500
001 1883063
005 2024-02-15
008 2010 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.theriogenology.2009.11.025$2DOI
100 1 $aVIANA, J. H. M.
245 $aOvarian follicular dynamics, follicle deviation, and oocyte yield in Gyr breed (Bos indicus) cows undergoing repeated ovum pick-up.$h[electronic resource]
260 $c2010
520 $aThe objective of this study was to evaluate ovarian follicular dynamics during intervals between successive ovum pick-up (OPU) and determine its effects on the number and quality of recovered cumulus-oocyte complexes (COCs) in Zebu cows (Bos indicus). Pluriparous nonlactating Gyr cows (Bos indicus; n = 10) underwent four consecutive OPU sessions at 96-h intervals. The dynamics of ovarian follicular growth between OPU sessions was monitored by twice-daily ultrasonographic examinations. A single dominant follicle (DF) or two codominant (CDF) follicles (>9 mm) were present in 63.3% (19 of 30) of intervals studied, with follicle deviation beginning when the future dominant follicle (F1) achieved a diameter of 6.2 0.3 mm. The phenomenon of codominance was observed in four (13.3%) of the inter-OPU intervals. The remaining intervals (36.6%, 11 of 30) were characterized by a greater follicular population, lower rate of follicular growth, and a smaller diameter F1 (P < 0.0001). There was a tendency (P = 0.08) toward an increase in the number of recovered COCs when dominant follicles were not present (NDF). The quality of COCs was not affected by the presence of a single dominant follicle, but codominant follicles resulted in recovery of a lower proportion of viable embryos (40.0%, 62.1%, and 63.6%; P < 0.05) and higher proportions of degenerate COCs (56.0%, 30.3%, and 28.6%; P < 0.05) for CDF, NDF, and DF respectively.We concluded that, in Zebu cows, (a) repeated follicle spirations altered ovarian follicular dynamics, perhaps by increasing follicular growth rate; (b) follicular dominance could be established in cows undergoing twice-a-week OPU; and (c) the presence of a dominant follicle during short inter-OPU intervals may not affect COC quality, except when a codominant follicle was present. # 2010 Elsevier Inc. All rights reserved.
650 $aCiclo estral
650 $aEndocrinologia
650 $aGado
650 $aReprodução animal
653 $aBrasil
653 $aDinâmica folicular
653 $aFolículo
653 $aFollicle ablation
653 $aOPU
653 $aOvarian follicle
653 $aOvarian follicular development
653 $aZebu cattle
700 1 $aPALHÃO, M. P.
700 1 $aSIQUEIRA, L. G. B.
700 1 $aFONSECA, J. F. da
700 1 $aCAMARGO, L. S. de A.
773 $tTheriogenology$gv. 73, n. 7, p. 966-972, 2010.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Gado de Leite (CNPGL) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Cerrados; Embrapa Recursos Genéticos e Biotecnologia; Embrapa Unidades Centrais. |
|
Data corrente: |
11/12/2018 |
|
Data da última atualização: |
10/11/2021 |
|
Tipo da produção científica: |
Documentos |
|
Autoria: |
PELEGRINELLI, F.; XAVIER, J. H. V.; BRAGA, A. R. dos S.; KARIA, C. T.; MACHADO, C. T. de T.; VIEIRA, E. A.; SOUSA, E. dos S. de; AQUINO, F. de G.; REIS JUNIOR, F. B. dos; LIMA, J. E. F. W.; VILELA, L.; CARVALHO, M. A.; VILELA, M. de F.; SA, M. A. C. de; MARCHAO, R. L.; SILVA NETO, S. P. da; REIN, T. A. |
|
Afiliação: |
FLAVIO PELEGRINELLI, CPAC; JOSE HUMBERTO VALADARES XAVIER, CPAC; ADRIANA REATTO DOS SANTOS BRAGA, SPD; CLAUDIO TAKAO KARIA, CPAC; CYNTHIA TORRES DE TOLEDO MACHADO, CPAC; EDUARDO ALANO VIEIRA, CPAC; EVIE DOS SANTOS DE SOUSA, Cenargen; FABIANA DE GOIS AQUINO, CPAC; FABIO BUENO DOS REIS JUNIOR, CPAC; JORGE ENOCH FURQUIM WERNECK LIMA, CPAC; LOURIVAL VILELA, CPAC; MARCELO AYRES CARVALHO, CPAC; MARINA DE FATIMA VILELA, CPAC; MARCOS AURELIO CAROLINO DE SA, CPAC; ROBELIO LEANDRO MARCHAO, CPAC; SEBASTIAO PEDRO DA SILVA NETO, CPAC; THOMAZ ADOLPHO REIN, CPAC. |
|
Título: |
Agenda de P&D da Embrapa Cerrados: metodologia de construção. |
|
Ano de publicação: |
2018 |
|
Fonte/Imprenta: |
Planaltina, DF: Embrapa Cerrados, 2018. |
|
Páginas: |
28 p. |
|
Série: |
(Embrapa Cerrados. Documentos, 349). |
|
Idioma: |
Português |
|
Conteúdo: |
Esta publicação sistematiza todo o conjunto de atividades e metodologia que permitiram a construção da Agenda de P&D&I, oferecendo, orientações para eventuais esforços similares para outras instituições de pesquisa. |
|
Thesagro: |
Gestão; Instituição de Pesquisa; Programa de Pesquisa. |
|
Thesaurus NAL: |
Methodology; Research and development; Research institutions; Work schedules. |
|
Categoria do assunto: |
--
X Pesquisa, Tecnologia e Engenharia |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/188177/1/Doc-349.pdf
|
|
Marc: |
LEADER 01397nam a2200409 a 4500
001 2101197
005 2021-11-10
008 2018 bl uuuu u0uu1 u #d
100 1 $aPELEGRINELLI, F.
245 $aAgenda de P&D da Embrapa Cerrados$bmetodologia de construção.$h[electronic resource]
260 $aPlanaltina, DF: Embrapa Cerrados$c2018
300 $a28 p.
490 $a(Embrapa Cerrados. Documentos, 349).
520 $aEsta publicação sistematiza todo o conjunto de atividades e metodologia que permitiram a construção da Agenda de P&D&I, oferecendo, orientações para eventuais esforços similares para outras instituições de pesquisa.
650 $aMethodology
650 $aResearch and development
650 $aResearch institutions
650 $aWork schedules
650 $aGestão
650 $aInstituição de Pesquisa
650 $aPrograma de Pesquisa
700 1 $aXAVIER, J. H. V.
700 1 $aBRAGA, A. R. dos S.
700 1 $aKARIA, C. T.
700 1 $aMACHADO, C. T. de T.
700 1 $aVIEIRA, E. A.
700 1 $aSOUSA, E. dos S. de
700 1 $aAQUINO, F. de G.
700 1 $aREIS JUNIOR, F. B. dos
700 1 $aLIMA, J. E. F. W.
700 1 $aVILELA, L.
700 1 $aCARVALHO, M. A.
700 1 $aVILELA, M. de F.
700 1 $aSA, M. A. C. de
700 1 $aMARCHAO, R. L.
700 1 $aSILVA NETO, S. P. da
700 1 $aREIN, T. A.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Cerrados (CPAC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
