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Registro Completo |
Biblioteca(s): |
Embrapa Pantanal. |
Data corrente: |
19/07/2023 |
Data da última atualização: |
19/07/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
GHELLER, J. M.; SILVA, G. C. da; SILVA, W. A. L. da; SILVA, A. F. da; COSTA FILHO, L. C. C.; NOGUEIRA, E.; MELO-STERZA, F. de A. |
Afiliação: |
JANAINA MENEGAZZO GHELLER, UNIVERSIDADE ESTADUAL DE MATO GROSSO DO SUL, Aquidauana-MS; GEANCARLOS CARRARO DA SILVA, UNIVERSIDADE ESTADUAL DE MATO GROSSO DO SUL, Aquidauana-MS; WILIAN APARECIDO LEITE DA SILVA, UNIVERSIDADE FEDERAL DE MATO GROSSO DO SUL; ALDAIR FÉLIX DA SILVA, UNIVERSIDADE ESTADUAL DE MATO GROSSO DO SUL, Aquidauana-MS; LUIZ CARLOS CÉSAR COSTA FILHO, PROCRIAR, Campo Grande-MS; ERIKLIS NOGUEIRA, CPAP; FABIANA DE ANDRADE MELO-STERZA, UNIVERSIDADE ESTADUAL DE MATO GROSSO DO SUL, Aquidauana-MS. |
Título: |
Antral follicle count classification selects fertile heifers without influencing the carcass traits. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
Semina: Ciências Agrárias, v. 44, n. 1, p. 85-96, jan./fev. 2023. |
ISSN: |
1679-0359 |
Idioma: |
Português |
Conteúdo: |
This study aimed to evaluate the ovarian structure, estrus intensity, ultrasound carcass measurements, and pregnancy rate of Nelore breed heifers and cows in accordance with antral follicle counts (AFCs). We evaluated 503 heifers and 565 Nelore cows, with a mean age of 15.5±2.2 and 69.8±36.1 months, respectively, submitted to a fixed-time artificial insemination (FTAI) protocol. On day zero, all bovine females were examined using ultrasound to determine the AFC. The mean AFC of the heifers and cows were 20±8.6 and 22.5±8.4, respectively. The rib-eye area (REA) and fat thickness (FT) of the heifers (n = 119 for REA and n = 219 for FT) were measured using ultrasound imaging. The average conception rates at the first FTAI and at the end of the breeding season were 35.8% and 57.5%, respectively, for heifers and 45.1% and 78.9%, respectively, for cows. We demonstrated that the probability of pregnancy at the first FTAI and at the end of the breeding season for both young heifers and cows increased as the AFC decreased (P>0.001 and P=0.0123, respectively). FT and REA showed no correlation with AFC in heifers. The intensity of estrus expression was negatively correlated with AFC (-0.46; P<0.0001). In conclusion, Nelore heifers and cows with low AFC had a high probability of pregnancy during the entire breeding season. Thus, AFC can be used as a tool to select heifers with increased fertility without affecting carcass traits (REA and FT). |
Palavras-Chave: |
População folicular. |
Thesagro: |
Carcaça; Gado Nelore; Inseminação Artificial; Ovário; Prenhez. |
Thesaurus Nal: |
Animal ovaries; Artificial insemination; Carcass quality; Follicular development; Pregnancy. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1155067/1/semina-2023.pdf
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Marc: |
LEADER 02455naa a2200337 a 4500 001 2155067 005 2023-07-19 008 2023 bl uuuu u00u1 u #d 022 $a1679-0359 100 1 $aGHELLER, J. M. 245 $aAntral follicle count classification selects fertile heifers without influencing the carcass traits.$h[electronic resource] 260 $c2023 520 $aThis study aimed to evaluate the ovarian structure, estrus intensity, ultrasound carcass measurements, and pregnancy rate of Nelore breed heifers and cows in accordance with antral follicle counts (AFCs). We evaluated 503 heifers and 565 Nelore cows, with a mean age of 15.5±2.2 and 69.8±36.1 months, respectively, submitted to a fixed-time artificial insemination (FTAI) protocol. On day zero, all bovine females were examined using ultrasound to determine the AFC. The mean AFC of the heifers and cows were 20±8.6 and 22.5±8.4, respectively. The rib-eye area (REA) and fat thickness (FT) of the heifers (n = 119 for REA and n = 219 for FT) were measured using ultrasound imaging. The average conception rates at the first FTAI and at the end of the breeding season were 35.8% and 57.5%, respectively, for heifers and 45.1% and 78.9%, respectively, for cows. We demonstrated that the probability of pregnancy at the first FTAI and at the end of the breeding season for both young heifers and cows increased as the AFC decreased (P>0.001 and P=0.0123, respectively). FT and REA showed no correlation with AFC in heifers. The intensity of estrus expression was negatively correlated with AFC (-0.46; P<0.0001). In conclusion, Nelore heifers and cows with low AFC had a high probability of pregnancy during the entire breeding season. Thus, AFC can be used as a tool to select heifers with increased fertility without affecting carcass traits (REA and FT). 650 $aAnimal ovaries 650 $aArtificial insemination 650 $aCarcass quality 650 $aFollicular development 650 $aPregnancy 650 $aCarcaça 650 $aGado Nelore 650 $aInseminação Artificial 650 $aOvário 650 $aPrenhez 653 $aPopulação folicular 700 1 $aSILVA, G. C. da 700 1 $aSILVA, W. A. L. da 700 1 $aSILVA, A. F. da 700 1 $aCOSTA FILHO, L. C. C. 700 1 $aNOGUEIRA, E. 700 1 $aMELO-STERZA, F. de A. 773 $tSemina: Ciências Agrárias$gv. 44, n. 1, p. 85-96, jan./fev. 2023.
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Embrapa Pantanal (CPAP) |
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Registros recuperados : 4 | |
2. | | BOCCHESE, R. A.; MELOTTO, A. M.; COSTA FILHO, L. C. C. da; FERNANDES, V.; NICODEMO, M. L. F.; LAURA, V. A. Avaliação da competição entre Brachiaria brizantha cv. Marandu, espécies arbóreas nativas do Cerrado e Eucalyptus citriodora. Revista Brasileira de Biociências, Porto Alegre, v. 5, supl. 2, p. 153-155, jul. 2007.Tipo: Artigo em Periódico Indexado |
Biblioteca(s): Embrapa Pecuária Sudeste. |
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3. | | GHELLER, J. M.; SILVA, G. C. da; SILVA, W. A. L. da; SILVA, A. F. da; COSTA FILHO, L. C. C.; NOGUEIRA, E.; MELO-STERZA, F. de A. Antral follicle count classification selects fertile heifers without influencing the carcass traits. Semina: Ciências Agrárias, v. 44, n. 1, p. 85-96, jan./fev. 2023.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 4 |
Biblioteca(s): Embrapa Pantanal. |
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4. | | NOGUEIRA, E.; BATISTA, D. S. do N.; COSTA FILHO, L. C. C. da; DIAS, A. M.; SILVA, J. C. B.; ÍTAVO, L. C. V. Pregnancy rate in lactating Bos indicus cows subjected to fixed-time artificial insemination and treated with different follicular growth inducers. Revista Brasileira de Zootecnia, v. 43, n. 7, p. 358-362, 2014.Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
Biblioteca(s): Embrapa Pantanal. |
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Registros recuperados : 4 | |
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