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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
19/12/2014 |
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Data da última atualização: |
19/12/2014 |
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Autoria: |
LEITE, E. J.; MOURA, V. P. G. |
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Afiliação: |
EDSON JUNQUEIRA LEITE, CENARGEN; VICENTE PONGITORY GIFONI MOURA. |
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Título: |
Princípios e estratégias para o melhor aproveitamento dos recursos genéticos florestais. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: COSTA, A. M.; SPEHAR, C. R.; SERENO, J. R. B. (Ed.). Conservação de recursos genéticos no Brasil. Brasília, DF : Embrapa, 2012. |
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Páginas: |
p. 380-407. |
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Idioma: |
Português |
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Palavras-Chave: |
Recursos genéticos floretais. |
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Thesagro: |
Melhoramento genético vegetal. |
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Thesaurus Nal: |
Genetic improvement. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/110820/1/costa-01.pdf
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Marc: |
LEADER 00644naa a2200169 a 4500
001 2003363
005 2014-12-19
008 2014 bl uuuu u00u1 u #d
100 1 $aLEITE, E. J.
245 $aPrincípios e estratégias para o melhor aproveitamento dos recursos genéticos florestais.$h[electronic resource]
260 $c2014
300 $ap. 380-407.
650 $aGenetic improvement
650 $aMelhoramento genético vegetal
653 $aRecursos genéticos floretais
700 1 $aMOURA, V. P. G.
773 $tIn: COSTA, A. M.; SPEHAR, C. R.; SERENO, J. R. B. (Ed.). Conservação de recursos genéticos no Brasil. Brasília, DF : Embrapa, 2012.
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Registro original: |
Embrapa Cerrados (CPAC) |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
23/03/2009 |
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Data da última atualização: |
16/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
TORRES-JÚNIOR, J. R. S.; PIRES, M. F. A.; SÁ, W. F.; FERREIRA, A. de M.; VIANA, J. H. M.; CAMARGO, L. S. A.; RAMOS, A. A.; FOLHADELLA, I. M.; POLISSENI, J.; FREITAS, C.; CLEMENTE, C. A. A.; SÁ FILHO, M. F.; PAULA-LOPES, F. F.; BARUSELLI, P. S. |
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Afiliação: |
J. R. S. Torres-Júnior, FMVZ/USP; Maria de Fátima Ávila Pires, Embrapa Gado de Leite; Wanderlei Ferreira de Sá, Embrapa Gado de Leite; Ademir de Moraes Ferreira, Embrapa Gado de Leite; João Henrique Moreira Viana, Embrapa Gado de Leite; Luiz Sérgio Almei. |
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Título: |
Effect of maternal heat-stress on follicular growth and oocyte competence in Bos indicus cattle. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Theriogenology, v. 69, n. 2, p. 155-166, 2008. |
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DOI: |
https://doi.org/10.1016/j.theriogenology.2007.06.023 |
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Idioma: |
Inglês |
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Conteúdo: |
The objective was to determine whether exposure of Gir (Bos indicus) cows to heat-stress (HS) causes immediate and delayed deleterious effect on follicular dynamics, hormonal profile and oocyte competence. The cows were kept in tie-stalls for an adaptive thermoneutral period of 28 days (Phase I, Days −28 to −1). In Phase II (Days 0–28) cows were randomly allocated into control (CG, n = 5) and HS (HS, n = 5) treatments. The HS cows were placed in an environmental chamber at 38 °C and 80% relative humidity (RH) during the day and 30 °C, 80% RH during the night for 28 days. The CG group was maintained in shaded tie-stalls (ambient temperature) for 28 days. During Phase III (Days 28–147) animals were placed in tie-stalls (Days 28–42) followed by pasture (Days 42–147) under thermoneutrality. In each phase, weekly ovum pick up (OPU) sessions were to evaluate follicular development, morphology of cumulus–oocyte complexes (COCs), and developmental competence after in vitro maturation, fertilization, and culture. Serum concentrations of progesterone (P4) and cortisol were evaluated by radioimmunoassay. Exposure of Gir cows to HS had no immediate effect on reproductive function, but exerted a delayed deleterious effect on ovarian follicular growth, hormone concentrations, and oocyte competence. Heat-stress increased the diameter of the first and second largest follicles from Days 28 to 49. Indeed, HS increased the number of >9 mm follicles (characterized as follicular codominance) during this phase. Cows exposed to HS had longer periods of non-cyclic activity (P4 < 1 ng/mL), as well as shorter estrous cycles. However, HS did not affect cortisol concentration as compared to CG. Although HS had no significant effect on cleavage rate, it reduced blastocyst development during Phase III. In conclusion, long-term exposure of B. indicus cattle to HS had a delayed deleterious effect on ovarian follicular dynamics and oocyte competence. MenosThe objective was to determine whether exposure of Gir (Bos indicus) cows to heat-stress (HS) causes immediate and delayed deleterious effect on follicular dynamics, hormonal profile and oocyte competence. The cows were kept in tie-stalls for an adaptive thermoneutral period of 28 days (Phase I, Days −28 to −1). In Phase II (Days 0–28) cows were randomly allocated into control (CG, n = 5) and HS (HS, n = 5) treatments. The HS cows were placed in an environmental chamber at 38 °C and 80% relative humidity (RH) during the day and 30 °C, 80% RH during the night for 28 days. The CG group was maintained in shaded tie-stalls (ambient temperature) for 28 days. During Phase III (Days 28–147) animals were placed in tie-stalls (Days 28–42) followed by pasture (Days 42–147) under thermoneutrality. In each phase, weekly ovum pick up (OPU) sessions were to evaluate follicular development, morphology of cumulus–oocyte complexes (COCs), and developmental competence after in vitro maturation, fertilization, and culture. Serum concentrations of progesterone (P4) and cortisol were evaluated by radioimmunoassay. Exposure of Gir cows to HS had no immediate effect on reproductive function, but exerted a delayed deleterious effect on ovarian follicular growth, hormone concentrations, and oocyte competence. Heat-stress increased the diameter of the first and second largest follicles from Days 28 to 49. Indeed, HS increased the number of >9 mm follicles (characterized as follicular codominance) dur... Mostrar Tudo |
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Palavras-Chave: |
Gir; Heat-stress; IVF; Oocyte; Ovarian follicle; PIV. |
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Thesagro: |
Bos Indicus. |
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Thesaurus NAL: |
animal reproduction. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/596415/1/Effect-of-maternal-heat-stress-on-follicular-growth-and-oocyte-competence-in-Bos-indicus-cattle.pdf
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Marc: |
LEADER 03070naa a2200385 a 4500
001 1596415
005 2024-02-16
008 2008 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.theriogenology.2007.06.023$2DOI
100 1 $aTORRES-JÚNIOR, J. R. S.
245 $aEffect of maternal heat-stress on follicular growth and oocyte competence in Bos indicus cattle.$h[electronic resource]
260 $c2008
520 $aThe objective was to determine whether exposure of Gir (Bos indicus) cows to heat-stress (HS) causes immediate and delayed deleterious effect on follicular dynamics, hormonal profile and oocyte competence. The cows were kept in tie-stalls for an adaptive thermoneutral period of 28 days (Phase I, Days −28 to −1). In Phase II (Days 0–28) cows were randomly allocated into control (CG, n = 5) and HS (HS, n = 5) treatments. The HS cows were placed in an environmental chamber at 38 °C and 80% relative humidity (RH) during the day and 30 °C, 80% RH during the night for 28 days. The CG group was maintained in shaded tie-stalls (ambient temperature) for 28 days. During Phase III (Days 28–147) animals were placed in tie-stalls (Days 28–42) followed by pasture (Days 42–147) under thermoneutrality. In each phase, weekly ovum pick up (OPU) sessions were to evaluate follicular development, morphology of cumulus–oocyte complexes (COCs), and developmental competence after in vitro maturation, fertilization, and culture. Serum concentrations of progesterone (P4) and cortisol were evaluated by radioimmunoassay. Exposure of Gir cows to HS had no immediate effect on reproductive function, but exerted a delayed deleterious effect on ovarian follicular growth, hormone concentrations, and oocyte competence. Heat-stress increased the diameter of the first and second largest follicles from Days 28 to 49. Indeed, HS increased the number of >9 mm follicles (characterized as follicular codominance) during this phase. Cows exposed to HS had longer periods of non-cyclic activity (P4 < 1 ng/mL), as well as shorter estrous cycles. However, HS did not affect cortisol concentration as compared to CG. Although HS had no significant effect on cleavage rate, it reduced blastocyst development during Phase III. In conclusion, long-term exposure of B. indicus cattle to HS had a delayed deleterious effect on ovarian follicular dynamics and oocyte competence.
650 $aanimal reproduction
650 $aBos Indicus
653 $aGir
653 $aHeat-stress
653 $aIVF
653 $aOocyte
653 $aOvarian follicle
653 $aPIV
700 1 $aPIRES, M. F. A.
700 1 $aSÁ, W. F.
700 1 $aFERREIRA, A. de M.
700 1 $aVIANA, J. H. M.
700 1 $aCAMARGO, L. S. A.
700 1 $aRAMOS, A. A.
700 1 $aFOLHADELLA, I. M.
700 1 $aPOLISSENI, J.
700 1 $aFREITAS, C.
700 1 $aCLEMENTE, C. A. A.
700 1 $aSÁ FILHO, M. F.
700 1 $aPAULA-LOPES, F. F.
700 1 $aBARUSELLI, P. S.
773 $tTheriogenology$gv. 69, n. 2, p. 155-166, 2008.
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