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Registro Completo |
Biblioteca(s): |
Embrapa Rondônia. |
Data corrente: |
29/06/2023 |
Data da última atualização: |
18/07/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SILVA, S. A.; MONDADORI, R. G.; NOLETO, G. S.; BARBOSA, I. P.; GONÇALVES, R. L.; GASPERIN, B. G.; ROVANI, M. T.; PAZ, E. F.; GOMES, L. S.; PFEIFER, L. F. M. |
Afiliação: |
SAMIRA A. SILVA, UNIVERSIDADE FEDERAL DE PELOTAS; RAFAEL G. MONDADORI, UNIVERSIDADE FEDERAL DE PELOTAS; GABRIELLY S. NOLETO, UNIVERSIDADE FEDERAL DE RONDÔNIA; INGRID P. BARBOSA, UNIVERSIDADE FEDERAL DO ACRE; REUEL L. GONÇALVES, BIOGENESIS BAGO SAÚDE ANIMAL; BERNARDO G. GASPERIN, UNIVERSIDADE FEDERAL DE PELOTAS; MONIQUE T. ROVANI, UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL; EANES F. PAZ, ASSITÊNCIA TÉCNICA E EXTENSÃO RURAL; LEONARDO S. GOMES, Embrapa Rondônia; LUIZ FRANCISCO MACHADO PFEIFER, CPAF-RO. |
Título: |
GnRH34 with or without estradiol cypionate in timed AI in Bos indicus beef cows. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
Theriogenology, v. 209, p. 134-140, 2023. |
ISSN: |
0093-691X |
DOI: |
https://doi.org/10.1016/j.theriogenology.2023.06.026 |
Idioma: |
Inglês |
Conteúdo: |
Two experiments were performed to evaluate the effects of GnRH treatment on the fertility of suckled Nelore beef cows treated with an estradiol/progesterone (E2/P4)-based protocol for timed artificial insemination (TAI). Experiment 1 focused on determining the effects of estradiol cypionate (EC) on ovulation in TAI cows treated with GnRH 34 h after removal of the intravaginal P4 device (IPD). Suckled cows (n ¼ 26) were treated with 2 mg estradiol benzoate (EB) and IPD containing 1 g P4. After 8 days, IPDs were removed, and all cows were treated with 150 mg of d-cloprostenol (prostaglandin F2 alpha analog) and 300 IU of equine chorionic gonadotropin (eCG), then separated into two treatment groups consisting of cows who received 1) saline 0.9% i.m. (GnRH34 group) or 2) 0.6 mg i.m. of EC (EC-GnRH34 group). On day 9 (05:00 p.m.), all cows were given GnRH (10.5 mg of buserelin acetate) i.m. No differences were observed between the groups (P > 0.05) in the time of ovulation after IPD removal or in the proportion of cows ovulating. Experiment 2 focused on determining the effects of GnRH34 along with or in the absence of EC on day 8 on pregnancy per AI (P/AI) in postpartum beef cows. Cows (n ¼ 981) were treated similarly to those in Experiment 1, but an additional group, the EC-GnRH48 group, was included, in which cows received EC on day 8 whereas those that did not show estrus received GnRH at TAI. Thus, in this experiment, groups consisted of GnRH34 (n ¼ 322), EC-GnRH34 (n ¼ 335), and EC-GnRH48 (n ¼ 324). A higher rate of estrus expression was observed in cows treated with EC following IPD removal (EC-GnRH34: 69%, EC-GnRH48: 64.8%) than in cows in the GnRH34 group (45.6%). No difference in P/AI was observed between the treatment groups (P ¼ 0.45), but P/AI in cows in the EC-GnRH34 group (64.2%) tended to be greater (P ¼ 0.1) than in cows in the GnRH34 group (58%). In summary, although ovulation synchrony did not differ among the groups, P/AI in cows treated with EC and GnRH 34 h after IPD removal tended to be greater than in cows treated solely with GnRH; this was most likely due to a shorter proestrus/estrus period, considering the lower proportion of cows that displayed estrus in the GnRH34 group. Finally, given that P/AI did not differ between the EC-GnRH34 and EC-GnRH48 groups, our results suggest that, for cows not displaying estrus, administration of EC at the time of IPD removal followed by treatment with GnRH 48 h afterward represents the most cost-efficient TAI strategy for South American Zebu-based beef operations. MenosTwo experiments were performed to evaluate the effects of GnRH treatment on the fertility of suckled Nelore beef cows treated with an estradiol/progesterone (E2/P4)-based protocol for timed artificial insemination (TAI). Experiment 1 focused on determining the effects of estradiol cypionate (EC) on ovulation in TAI cows treated with GnRH 34 h after removal of the intravaginal P4 device (IPD). Suckled cows (n ¼ 26) were treated with 2 mg estradiol benzoate (EB) and IPD containing 1 g P4. After 8 days, IPDs were removed, and all cows were treated with 150 mg of d-cloprostenol (prostaglandin F2 alpha analog) and 300 IU of equine chorionic gonadotropin (eCG), then separated into two treatment groups consisting of cows who received 1) saline 0.9% i.m. (GnRH34 group) or 2) 0.6 mg i.m. of EC (EC-GnRH34 group). On day 9 (05:00 p.m.), all cows were given GnRH (10.5 mg of buserelin acetate) i.m. No differences were observed between the groups (P > 0.05) in the time of ovulation after IPD removal or in the proportion of cows ovulating. Experiment 2 focused on determining the effects of GnRH34 along with or in the absence of EC on day 8 on pregnancy per AI (P/AI) in postpartum beef cows. Cows (n ¼ 981) were treated similarly to those in Experiment 1, but an additional group, the EC-GnRH48 group, was included, in which cows received EC on day 8 whereas those that did not show estrus received GnRH at TAI. Thus, in this experiment, groups consisted of GnRH34 (n ¼ 322), EC-GnRH34 (n ¼ 335),... Mostrar Tudo |
Palavras-Chave: |
Amazônia Ocidental; Embrapa Rondôna; Western Amazon. |
Thesagro: |
Bos Indicus; Campo Experimental; Estradiol; Fertilidade Animal; Gado Nelore; Hormônio; Ovulação; Prenhez; Reprodução Animal; Vaca de Corte. |
Thesaurus Nal: |
Animal fertility; Animal reproduction; Beef cows; Demonstration farms; Hormones; Nellore; Ovulation; Pregnancy. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1154705/1/cpafro-18957.pdf
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Marc: |
LEADER 03947naa a2200505 a 4500 001 2154705 005 2023-07-18 008 2023 bl uuuu u00u1 u #d 022 $a0093-691X 024 7 $ahttps://doi.org/10.1016/j.theriogenology.2023.06.026$2DOI 100 1 $aSILVA, S. A. 245 $aGnRH34 with or without estradiol cypionate in timed AI in Bos indicus beef cows.$h[electronic resource] 260 $c2023 520 $aTwo experiments were performed to evaluate the effects of GnRH treatment on the fertility of suckled Nelore beef cows treated with an estradiol/progesterone (E2/P4)-based protocol for timed artificial insemination (TAI). Experiment 1 focused on determining the effects of estradiol cypionate (EC) on ovulation in TAI cows treated with GnRH 34 h after removal of the intravaginal P4 device (IPD). Suckled cows (n ¼ 26) were treated with 2 mg estradiol benzoate (EB) and IPD containing 1 g P4. After 8 days, IPDs were removed, and all cows were treated with 150 mg of d-cloprostenol (prostaglandin F2 alpha analog) and 300 IU of equine chorionic gonadotropin (eCG), then separated into two treatment groups consisting of cows who received 1) saline 0.9% i.m. (GnRH34 group) or 2) 0.6 mg i.m. of EC (EC-GnRH34 group). On day 9 (05:00 p.m.), all cows were given GnRH (10.5 mg of buserelin acetate) i.m. No differences were observed between the groups (P > 0.05) in the time of ovulation after IPD removal or in the proportion of cows ovulating. Experiment 2 focused on determining the effects of GnRH34 along with or in the absence of EC on day 8 on pregnancy per AI (P/AI) in postpartum beef cows. Cows (n ¼ 981) were treated similarly to those in Experiment 1, but an additional group, the EC-GnRH48 group, was included, in which cows received EC on day 8 whereas those that did not show estrus received GnRH at TAI. Thus, in this experiment, groups consisted of GnRH34 (n ¼ 322), EC-GnRH34 (n ¼ 335), and EC-GnRH48 (n ¼ 324). A higher rate of estrus expression was observed in cows treated with EC following IPD removal (EC-GnRH34: 69%, EC-GnRH48: 64.8%) than in cows in the GnRH34 group (45.6%). No difference in P/AI was observed between the treatment groups (P ¼ 0.45), but P/AI in cows in the EC-GnRH34 group (64.2%) tended to be greater (P ¼ 0.1) than in cows in the GnRH34 group (58%). In summary, although ovulation synchrony did not differ among the groups, P/AI in cows treated with EC and GnRH 34 h after IPD removal tended to be greater than in cows treated solely with GnRH; this was most likely due to a shorter proestrus/estrus period, considering the lower proportion of cows that displayed estrus in the GnRH34 group. Finally, given that P/AI did not differ between the EC-GnRH34 and EC-GnRH48 groups, our results suggest that, for cows not displaying estrus, administration of EC at the time of IPD removal followed by treatment with GnRH 48 h afterward represents the most cost-efficient TAI strategy for South American Zebu-based beef operations. 650 $aAnimal fertility 650 $aAnimal reproduction 650 $aBeef cows 650 $aDemonstration farms 650 $aHormones 650 $aNellore 650 $aOvulation 650 $aPregnancy 650 $aBos Indicus 650 $aCampo Experimental 650 $aEstradiol 650 $aFertilidade Animal 650 $aGado Nelore 650 $aHormônio 650 $aOvulação 650 $aPrenhez 650 $aReprodução Animal 650 $aVaca de Corte 653 $aAmazônia Ocidental 653 $aEmbrapa Rondôna 653 $aWestern Amazon 700 1 $aMONDADORI, R. G. 700 1 $aNOLETO, G. S. 700 1 $aBARBOSA, I. P. 700 1 $aGONÇALVES, R. L. 700 1 $aGASPERIN, B. G. 700 1 $aROVANI, M. T. 700 1 $aPAZ, E. F. 700 1 $aGOMES, L. S. 700 1 $aPFEIFER, L. F. M. 773 $tTheriogenology$gv. 209, p. 134-140, 2023.
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Registro original: |
Embrapa Rondônia (CPAF-RO) |
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Registro Completo
Biblioteca(s): |
Embrapa Amazônia Ocidental. |
Data corrente: |
13/12/2017 |
Data da última atualização: |
13/12/2017 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
SILVA, E. J. D. da; HARADA, P. K.; CORDEIRO, E. R.; QUISEN, R. C. |
Afiliação: |
EDUARDO JOSÉ DIAS DA SILVA, Bolsista Pibic/CNPq; PAMELA KEIKO HARADA, CPAA; EVERTON RABELO CORDEIRO, CPAA; REGINA CAETANO QUISEN, CNPF. |
Título: |
Formação de calos primários em anteras de seringueira. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE FLORICULTURA E PLANTAS ORNAMENTAIS, 21.; CONGRESSO BRASILEIRO DE CULTURA DE TECIDOS DE PLANTAS, 8., 2017, Bonito. Anais... [S.l.]: SBFPO: ABCTP, 2017. |
Idioma: |
Português |
Conteúdo: |
O presente trabalho teve como objetivo avaliar a calogênese primária em anteras de Hevea spp., visando suprir com subsídios para a definição de protocolos de embriogênese somática para a produção de plantas haplóides de clones superiores de seringueira. |
Palavras-Chave: |
Cultura de haplóides; Embriogênese somática. |
Thesagro: |
Hevea. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/168900/1/FORMACAO-DE-CALOS-PRIMARIOS-EM-ANTERAS-DE-SERINGUEIRA.pdf
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Marc: |
LEADER 00920nam a2200181 a 4500 001 2082429 005 2017-12-13 008 2017 bl uuuu u00u1 u #d 100 1 $aSILVA, E. J. D. da 245 $aFormação de calos primários em anteras de seringueira.$h[electronic resource] 260 $aIn: CONGRESSO BRASILEIRO DE FLORICULTURA E PLANTAS ORNAMENTAIS, 21.; CONGRESSO BRASILEIRO DE CULTURA DE TECIDOS DE PLANTAS, 8., 2017, Bonito. Anais... [S.l.]: SBFPO: ABCTP$c2017 520 $aO presente trabalho teve como objetivo avaliar a calogênese primária em anteras de Hevea spp., visando suprir com subsídios para a definição de protocolos de embriogênese somática para a produção de plantas haplóides de clones superiores de seringueira. 650 $aHevea 653 $aCultura de haplóides 653 $aEmbriogênese somática 700 1 $aHARADA, P. K. 700 1 $aCORDEIRO, E. R. 700 1 $aQUISEN, R. C.
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