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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: |
25/09/2000 |
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Data da última atualização: |
11/08/2023 |
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Autoria: |
ADAMS, G. P. |
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Título: |
Comparative patterns of follicle development and selection in ruminants. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Journal Reproduction and Fertility, v. 54, suppl. p. 17-32, 1999. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Expanding technological capabilities, particularly in ultrasonography and molecular endocrinology, have bridged the gap between form and function of the ovary, and have been a catalyst for intense research activity in this area during the last decade. However, the study of follicular dynamics is still in its infancy in ruminant species other than cattle, and controversy persists regarding the pattern of follicular growth and the existence of follicular dominance. The bovine model of ovarian function is presented as a foundation for concepts surrounding the control of follicular development in ruminants, and to place in context the results of recent studies in sheep, goats, muskoxen, cervids and camelids. This comparative approach is used to determine important generalities that appear to be applicable, as fundamental physiological phenomena, to all ruminant species. Although clear differences in follicular dynamics are evident, differences appear to be specific rather than general, and the following conclusions are consistent with results reported in ruminant species to date: (1) follicles grow in a wave-like fashion; (2) periodic surges in circulating FSH are associated with follicular wave emergence; (3) selection of a dominant follicle involves a decline in FSH and acquisition of LH responsiveness; (4) periodic anovulatory follicular waves continue to emerge until occurrence of an LH surge (that is, at the time of luteolysis during the ovulatory season or during transition from the anovulatory season); (5) within species, there is a positive relationship between the duration of the oestrous cycle and the number of follicular waves; (6) progesterone suppresses LH secretion and growth of the dominant follicle; (7) the duration of the interwave interval is a function of follicular dominance, and is negatively correlated with circulating FSH; (8) follicular dominance in all species is more pronounced during the first and last follicular waves of the oestrous cycle; and (9) pregnancy, the prepubertal period and seasonal anoestrus are characterized by regular, periodic surges in FSH and emergence of anovulatory follicular waves. MenosAbstract: Expanding technological capabilities, particularly in ultrasonography and molecular endocrinology, have bridged the gap between form and function of the ovary, and have been a catalyst for intense research activity in this area during the last decade. However, the study of follicular dynamics is still in its infancy in ruminant species other than cattle, and controversy persists regarding the pattern of follicular growth and the existence of follicular dominance. The bovine model of ovarian function is presented as a foundation for concepts surrounding the control of follicular development in ruminants, and to place in context the results of recent studies in sheep, goats, muskoxen, cervids and camelids. This comparative approach is used to determine important generalities that appear to be applicable, as fundamental physiological phenomena, to all ruminant species. Although clear differences in follicular dynamics are evident, differences appear to be specific rather than general, and the following conclusions are consistent with results reported in ruminant species to date: (1) follicles grow in a wave-like fashion; (2) periodic surges in circulating FSH are associated with follicular wave emergence; (3) selection of a dominant follicle involves a decline in FSH and acquisition of LH responsiveness; (4) periodic anovulatory follicular waves continue to emerge until occurrence of an LH surge (that is, at the time of luteolysis during the ovulatory season or during... Mostrar Tudo |
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Palavras-Chave: |
Crescimento folicular; FSH; Onda folicular. |
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Thesagro: |
Endocrinologia; Ruminante. |
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Thesaurus Nal: |
Cattle; Estrous cycle; Follicular development; Goats; Pregnancy; Reproduction; Sheep. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02893naa a2200265 a 4500
001 1524151
005 2023-08-11
008 1999 bl uuuu u00u1 u #d
100 1 $aADAMS, G. P.
245 $aComparative patterns of follicle development and selection in ruminants.$h[electronic resource]
260 $c1999
520 $aAbstract: Expanding technological capabilities, particularly in ultrasonography and molecular endocrinology, have bridged the gap between form and function of the ovary, and have been a catalyst for intense research activity in this area during the last decade. However, the study of follicular dynamics is still in its infancy in ruminant species other than cattle, and controversy persists regarding the pattern of follicular growth and the existence of follicular dominance. The bovine model of ovarian function is presented as a foundation for concepts surrounding the control of follicular development in ruminants, and to place in context the results of recent studies in sheep, goats, muskoxen, cervids and camelids. This comparative approach is used to determine important generalities that appear to be applicable, as fundamental physiological phenomena, to all ruminant species. Although clear differences in follicular dynamics are evident, differences appear to be specific rather than general, and the following conclusions are consistent with results reported in ruminant species to date: (1) follicles grow in a wave-like fashion; (2) periodic surges in circulating FSH are associated with follicular wave emergence; (3) selection of a dominant follicle involves a decline in FSH and acquisition of LH responsiveness; (4) periodic anovulatory follicular waves continue to emerge until occurrence of an LH surge (that is, at the time of luteolysis during the ovulatory season or during transition from the anovulatory season); (5) within species, there is a positive relationship between the duration of the oestrous cycle and the number of follicular waves; (6) progesterone suppresses LH secretion and growth of the dominant follicle; (7) the duration of the interwave interval is a function of follicular dominance, and is negatively correlated with circulating FSH; (8) follicular dominance in all species is more pronounced during the first and last follicular waves of the oestrous cycle; and (9) pregnancy, the prepubertal period and seasonal anoestrus are characterized by regular, periodic surges in FSH and emergence of anovulatory follicular waves.
650 $aCattle
650 $aEstrous cycle
650 $aFollicular development
650 $aGoats
650 $aPregnancy
650 $aReproduction
650 $aSheep
650 $aEndocrinologia
650 $aRuminante
653 $aCrescimento folicular
653 $aFSH
653 $aOnda folicular
773 $tJournal Reproduction and Fertility$gv. 54, suppl. p. 17-32, 1999.
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Embrapa Caprinos e Ovinos (CNPC) |
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| 5. |  | PINHEIRO, R. R.; BRITO, R. L. L. de; ANDRIOLI, A.; ALVES, F. S. F.; SILVA NETO, J.; GOMES, F. P. Meningite bacteriana em ovinos; relato de caso. Revista Brasileira de Higiene e Sanidade Animal, v. 12, n. 1, p. 92-100, jan./mar. 2018.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 10. | | BORGES, M. G.; GUIMARAES, C. M.; MELO, L. C.; CUNHA, D. G. M.; SILVA NETO, J. B. da; SOUZA, R. O.; SOUZA, R. O. Desenvolvimento radicular de famílias F5:8 de feijão do cruzamento 'BRS Pérola' X BAT 477 com e sem deficiência hídrica. In: CONGRESSO BRASILEIRO DE MELHORAMENTO DE PLANTAS, 8., 2015, Goiânia. O melhoramento de plantas, o futuro da agricultura e a soberania nacional: anais. Goiânia: UFG: SBMP, 2015.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 11. | | ANTONIO, R. P.; LIRA, I. C. de S. A.; SANTOS, J. D. da S.; SILVA NETO, J. L.; LOPES, F. de S. Estabelecimento da coleção de espécies silvestres do gênero Manihot na Embrapa Semiárido. In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 4., 2016, Curitiba. Recursos genéticos no Brasil: a base para o desenvolvimento sustentável: anais. Brasília, DF: Sociedade Brasileira de Recursos Genéticos, 2016. p. 416.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| 12. | | TAVARES, M. S.; ALBUQUERQUE, F. A. de; SILVA NETO, J. J.; OLIVEIRA, R. de A.; FERREIRA, V. C. da S.; LUCENA, N. Q. Análise energética de um sistema agroecológico de agricultura familiar, no assentamento de Queimadas, no município de Remígio-PB. In: SIMPÓSIO REGIONAL DE AGROECOLOGIA, 1., 2009, Areia, PB. Anais...Areia: UFPB, 2009. 5 p.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
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| 14. | | ANTONIO, R. P.; LIRA, I. C. de S. A.; SANTOS, J. D. da S.; SILVA NETO, J. L. da; BORGES, R. O. Marcadores SSR de mandioca transferíveis para espécies silvestres do gênero Manihot. In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 4., 2016, Curitiba. Recursos genéticos no Brasil: a base para o desenvolvimento sustentável: anais. Brasília, DF: Sociedade Brasileira de Recursos Genéticos, 2016. p. 481.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| 15. | | ANJOS, J. L. dos; SILVA NETO, J. A. da; PORTELA, J. C.; CURADO, F. F.; SCHIEDECK, G.; SILVA, G. D. da. Proporções de composto e vermicomposto em substrato para produção de mudas de Mulungu (Erythrina velutina,Willd). In: CONGRESSO BRASILEIRO DE RESÍDUOS ORGÂNICOS, 3.; ENCONTRO NACIONAL DE SUBSTRATOS PARA PLANTAS, 9., 2014, Vitória. Anais... Vitória: INCAPER; CEDAGRO, 2014.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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| 16. | | SANTOS, J. D. da S.; ANTONIO, R. P.; SILVA NETO, J. L. da; RIBEIRO JUNIOR, P. M.; DIAS, R. de C. S. Reação de acessos de meloeiro a Fusarium solani f. sp. cucurbitae. In: JORNADA DE INICIAÇÃO CIENTÍFICA DA EMBRAPA SEMIÁRIDO, 10., 2015, Petrolina. Anais... Petrolina: Embrapa Semiárido, 2015. p. 319-324. 1 CD-ROM. (Embrapa Semiárido. Documentos, 264).| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| 17. | | AMORIM, M. C. C. de; BRITO, L. T. de L.; NASCIMENTO, G. S. G. do; SILVA NETO, J. A. da; LEITE, W. de M. Captação e armazenamento de água de chuva, Petrolina, PE: avaliação de aspectos estruturais e de qualidade da água. Revista AIDIS de Ingenieria y Ciencias Ambientales, v. 10, n. 1, p. 18-30, abr. 2017.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
| Biblioteca(s): Embrapa Semiárido. |
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| 18. | | NOVAES, M. H. M. de; ANTONIO, R. P.; LIRA, I. C. de S. A.; SILVEIRA, L. M. da; SILVA NETO, J. L. da; LOPES, F. de S. Caracterização morfológica de acessos do BAG de mandioca da Embrapa Semiárido. In: JORNADA DE INTEGRAÇÃO DA PÓS-GRADUAÇÃO DA EMBRAPA SEMIÁRIDO, 2., 2017, Petrolina. Anais... Petrolina: Embrapa Semiárido, 2017. p. 299-306. (Embrapa Semiárido. Documentos, 280).| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| 20. | | ANTONIO, R. P.; SILVA, A. F.; LIRA, I. C. de S. A.; SANTOS, J. D. da S.; SILVA NETO, J. L. da; SANTOS, T. H. do N. Banco Regional de Germoplasma de Mandioca do Semiárido do Nordeste do Brasil. In: SIMPÓSIO DA REDE DE RECURSOS GENÉTICOS VEGETAIS DO NORDESTE, 2., 2015, Fortaleza. Valorização e uso da plantas Caatinga. Fortaleza: Embrapa Agroindústria Tropical: Universidade Federal do Ceará, 2015.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Semiárido. |
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| Registros recuperados : 38 | |
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