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Registro Completo |
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
27/11/2020 |
Data da última atualização: |
27/11/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
VERGANI, G. B.; FONSECA, J. F. da; TREVIZAN, J. T.; PEREIRA, V. S. do A.; GARCIA, A. R.; BRANDÃO. F. Z.; SOUZA-FABJAN, J. M. G.; OLIVEIRA, M. E. F. |
Afiliação: |
GABRIEL BRUN VERGANI, UNESP; JEFERSON FERREIRA DA FONSECA, CNPC; JULIANE TERAMACHI TREVIZAN, UNESP; VERONICA SCHINAIDER DO A PEREIRA, CPPSE; ALEXANDRE ROSSETTO GARCIA, CPPSE; FELIPE ZANDONADI BRANDÃO, UFF; JOANNA MARIA GONÇALVES SOUZA-FABJAN, UFF; MARIA EMILIA FRANCO OLIVEIRA, UNESP. |
Título: |
Luteotropic effects of human chorionic gonadotropin administered 7.5 days after synchronous estrous induction in Morada Nova ewes. |
Ano de publicação: |
2020 |
Fonte/Imprenta: |
Animal Reproduction Science, v. 223, article 106644, Dec. 2020. |
DOI: |
https://doi.org/10.1016/j.anireprosci.2020.106644 |
Idioma: |
Inglês |
Conteúdo: |
Abstract: This study was conducted in ewes to assess effects of human chorionic gonadotropin (hCG) administration after imposing an estrous induction treatment regimen. Ewes (n = 115) were treated with a 60 mg medroxyprogesterone-intravaginal-sponge for 6 d plus 200 IU of equine chorionic gonadotropin (eCG) im and 37.5 ?g d-cloprostenol im 36 h before sponge removal (Day 0). After natural mating, ewes having at least one corpus luteum (CL; n = 108) were administered either 1 mL of saline (G-Control; n = 53) or 300 IU of hCG (G-hCG; n = 55) on Day 7.5 after sponge removal (Day 0). Ovarian ultrasonography and blood collection were performed on Days 7.5, 13.5, 17.5, 21.5, and 30.5. Accessory CL (aCL) were observed in 81.5 % (G-hCG) and 0.0 % (G-Control) of ewes (P = 0.0001). Diameter, area, and volume of luteal tissue were greater (P < 0.05) in G-hCG from Day 13.5 to 30.5. Progesterone (P4) concentrations were greater (P < 0.05) on Days 13.5, 17.5, 21.5 and 30.5 for ewes of the G-hCG group. Pregnancy percentage was similar (P = 0.25) between groups [47.1 % (G-control) compared with 60.0 % (G-hCG)], although total number of lambs produced by estrous synchronized ewes was greater (P = 0.005) in ewes of the G-hCG group (90.9 % compared with 66.0 %). In conclusion, hCG administration 7.5 days after sponge removal from Morada Nova ewes during the non-breeding season is an effective treatment to induce aCL formation, improve luteal tissue biometry and P4 concentrations, and to enhance the total number of lambs born. MenosAbstract: This study was conducted in ewes to assess effects of human chorionic gonadotropin (hCG) administration after imposing an estrous induction treatment regimen. Ewes (n = 115) were treated with a 60 mg medroxyprogesterone-intravaginal-sponge for 6 d plus 200 IU of equine chorionic gonadotropin (eCG) im and 37.5 ?g d-cloprostenol im 36 h before sponge removal (Day 0). After natural mating, ewes having at least one corpus luteum (CL; n = 108) were administered either 1 mL of saline (G-Control; n = 53) or 300 IU of hCG (G-hCG; n = 55) on Day 7.5 after sponge removal (Day 0). Ovarian ultrasonography and blood collection were performed on Days 7.5, 13.5, 17.5, 21.5, and 30.5. Accessory CL (aCL) were observed in 81.5 % (G-hCG) and 0.0 % (G-Control) of ewes (P = 0.0001). Diameter, area, and volume of luteal tissue were greater (P < 0.05) in G-hCG from Day 13.5 to 30.5. Progesterone (P4) concentrations were greater (P < 0.05) on Days 13.5, 17.5, 21.5 and 30.5 for ewes of the G-hCG group. Pregnancy percentage was similar (P = 0.25) between groups [47.1 % (G-control) compared with 60.0 % (G-hCG)], although total number of lambs produced by estrous synchronized ewes was greater (P = 0.005) in ewes of the G-hCG group (90.9 % compared with 66.0 %). In conclusion, hCG administration 7.5 days after sponge removal from Morada Nova ewes during the non-breeding season is an effective treatment to induce aCL formation, improve luteal tissue biometry and P4 concentrations, and to enhanc... Mostrar Tudo |
Palavras-Chave: |
Accessory corpora lutea; HCG; Luteal vascularization; Oestrous cycle; Ovarian ultrasonography. |
Thesagro: |
Ciclo Estral; Corpo Lúteo; Ovino; Progesterona; Reprodução Animal. |
Thesaurus Nal: |
Animal reproduction; Estrous cycle; Progesterone; Sheep. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02719naa a2200385 a 4500 001 2127133 005 2020-11-27 008 2020 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.anireprosci.2020.106644$2DOI 100 1 $aVERGANI, G. B. 245 $aLuteotropic effects of human chorionic gonadotropin administered 7.5 days after synchronous estrous induction in Morada Nova ewes.$h[electronic resource] 260 $c2020 520 $aAbstract: This study was conducted in ewes to assess effects of human chorionic gonadotropin (hCG) administration after imposing an estrous induction treatment regimen. Ewes (n = 115) were treated with a 60 mg medroxyprogesterone-intravaginal-sponge for 6 d plus 200 IU of equine chorionic gonadotropin (eCG) im and 37.5 ?g d-cloprostenol im 36 h before sponge removal (Day 0). After natural mating, ewes having at least one corpus luteum (CL; n = 108) were administered either 1 mL of saline (G-Control; n = 53) or 300 IU of hCG (G-hCG; n = 55) on Day 7.5 after sponge removal (Day 0). Ovarian ultrasonography and blood collection were performed on Days 7.5, 13.5, 17.5, 21.5, and 30.5. Accessory CL (aCL) were observed in 81.5 % (G-hCG) and 0.0 % (G-Control) of ewes (P = 0.0001). Diameter, area, and volume of luteal tissue were greater (P < 0.05) in G-hCG from Day 13.5 to 30.5. Progesterone (P4) concentrations were greater (P < 0.05) on Days 13.5, 17.5, 21.5 and 30.5 for ewes of the G-hCG group. Pregnancy percentage was similar (P = 0.25) between groups [47.1 % (G-control) compared with 60.0 % (G-hCG)], although total number of lambs produced by estrous synchronized ewes was greater (P = 0.005) in ewes of the G-hCG group (90.9 % compared with 66.0 %). In conclusion, hCG administration 7.5 days after sponge removal from Morada Nova ewes during the non-breeding season is an effective treatment to induce aCL formation, improve luteal tissue biometry and P4 concentrations, and to enhance the total number of lambs born. 650 $aAnimal reproduction 650 $aEstrous cycle 650 $aProgesterone 650 $aSheep 650 $aCiclo Estral 650 $aCorpo Lúteo 650 $aOvino 650 $aProgesterona 650 $aReprodução Animal 653 $aAccessory corpora lutea 653 $aHCG 653 $aLuteal vascularization 653 $aOestrous cycle 653 $aOvarian ultrasonography 700 1 $aFONSECA, J. F. da 700 1 $aTREVIZAN, J. T. 700 1 $aPEREIRA, V. S. do A. 700 1 $aGARCIA, A. R. 700 1 $aBRANDÃO. F. Z. 700 1 $aSOUZA-FABJAN, J. M. G. 700 1 $aOLIVEIRA, M. E. F. 773 $tAnimal Reproduction Science$gv. 223, article 106644, Dec. 2020.
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Embrapa Pecuária Sudeste (CPPSE) |
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Registro Completo
Biblioteca(s): |
Embrapa Gado de Corte. |
Data corrente: |
14/04/1999 |
Data da última atualização: |
02/03/2015 |
Autoria: |
JOSAHKIAN, L. A.; SILVA, L. O. C. da. |
Afiliação: |
ABCZ. |
Título: |
Manual basico de melhoramento genetico animal aplicado em bovinos de corte. |
Ano de publicação: |
1998 |
Fonte/Imprenta: |
Uberaba: ABCZ, 1998. |
Páginas: |
45p. |
Idioma: |
Português |
Notas: |
CNPGC |
Conteúdo: |
Conceitos basicos de genetica; Metodos de selecao; Tipos de selecao; Passos para instalacao de um programa de melhoramento genetico; Vantagens de um programa de melhoramento; As caracteristicas basicas que devem ser consideradas em um programa de melhoramento; A reproducao; Selecionando as matrizes pela reproducao e habilidade materna; Avaliacao linear de tipo de gado de corte; Como proceder a avaliacao. |
Palavras-Chave: |
Bovine; Bovino de corte; Genetic advance; Melhoramento genetico. |
Thesaurus NAL: |
beef cattle; breeding. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00963nam a2200217 a 4500 001 1318975 005 2015-03-02 008 1998 bl uuuu u0uu1 u #d 100 1 $aJOSAHKIAN, L. A. 245 $aManual basico de melhoramento genetico animal aplicado em bovinos de corte. 260 $aUberaba: ABCZ$c1998 300 $a45p. 500 $aCNPGC 520 $aConceitos basicos de genetica; Metodos de selecao; Tipos de selecao; Passos para instalacao de um programa de melhoramento genetico; Vantagens de um programa de melhoramento; As caracteristicas basicas que devem ser consideradas em um programa de melhoramento; A reproducao; Selecionando as matrizes pela reproducao e habilidade materna; Avaliacao linear de tipo de gado de corte; Como proceder a avaliacao. 650 $abeef cattle 650 $abreeding 653 $aBovine 653 $aBovino de corte 653 $aGenetic advance 653 $aMelhoramento genetico 700 1 $aSILVA, L. O. C. da
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