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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
13/12/2018 |
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Data da última atualização: |
24/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ROCHA, G. M. F.; COBUCI, J. A.; COSTA, C. N.; ABREU, L. R. A.; MOTA, L. F. M.; PIRES, A. V.; VILLELA, S. D. J.; MARTINS, P. G. M. A. |
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Afiliação: |
Graziela M. F. Rocha, Federal University of Jequitinhonha and Mucuri Valleys; Jaime A. Cobuci, UFRGS; CLAUDIO NAPOLIS COSTA, CNPGL; Luíza R. A. Abreu, Federal University of Jequitinhonha and Mucuri Valleys; Lúcio F. M. Mota, Federal University of Jequitinhonha and Mucuri Valleys; Aldrin V. Pires, Federal University of Jequitinhonha and Mucuri Valleys; Severino D. J. Villela, Federal University of Jequitinhonha and Mucuri Valleys; Paulo G. M. A. Martins, Federal University of Jequitinhonha and Mucuri Valleys. |
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Título: |
Genetic association between stayability, and productive and reproductive traits in Holstein cows. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Animal Production Science, v. 58, n. 10, p. 1788-1793, 2017. |
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DOI: |
10.1071/AN16563 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract The objective was to estimate the genetic parameters for the cow?s ability to stay in the herd (stayability) until 48 and 54 months of age (STAY48 and STAY54) and up to 36 and 48 months after the first calving (STAY36ac and STAY48ac), and their associations with 305-day milk production (MP305) in the first lactation, age at first calving and first calving interval, from the first three lactations of cows reared in Brazil and born between 1987 and 2006. The covariance components were estimated by bivariate analyses, using the Bayesian approach. The a posteriori distributions of the components of interest were obtained with the Gibbs sampler. Fixed effect of contemporary group, additive and residual random genetic effect, and age of dam as covariate (linear and quadratic) were included in the analyses. Low heritability values were obtained for most traits, except for STAY48ac and MP305. Genetic correlation estimates between age at first calving and stayability traits were high and positive, except for STAY48ac. In addition, we detected genetic correlations between MP305 and STAY36ac and STAY48ac. In conclusion, we can infer that genetic correlations between MP305, and STAY36ac and STAY48ac indicate that the current focus on selection of animals for improved milk production in the first lactation can lead to genetic gains on longevity, although not expressive. |
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Palavras-Chave: |
Age at first calving. |
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Thesaurus Nal: |
Dairy cattle; Genetic correlation; Longevity. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02181naa a2200265 a 4500
001 2101402
005 2023-01-24
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1071/AN16563$2DOI
100 1 $aROCHA, G. M. F.
245 $aGenetic association between stayability, and productive and reproductive traits in Holstein cows.$h[electronic resource]
260 $c2017
520 $aAbstract The objective was to estimate the genetic parameters for the cow?s ability to stay in the herd (stayability) until 48 and 54 months of age (STAY48 and STAY54) and up to 36 and 48 months after the first calving (STAY36ac and STAY48ac), and their associations with 305-day milk production (MP305) in the first lactation, age at first calving and first calving interval, from the first three lactations of cows reared in Brazil and born between 1987 and 2006. The covariance components were estimated by bivariate analyses, using the Bayesian approach. The a posteriori distributions of the components of interest were obtained with the Gibbs sampler. Fixed effect of contemporary group, additive and residual random genetic effect, and age of dam as covariate (linear and quadratic) were included in the analyses. Low heritability values were obtained for most traits, except for STAY48ac and MP305. Genetic correlation estimates between age at first calving and stayability traits were high and positive, except for STAY48ac. In addition, we detected genetic correlations between MP305 and STAY36ac and STAY48ac. In conclusion, we can infer that genetic correlations between MP305, and STAY36ac and STAY48ac indicate that the current focus on selection of animals for improved milk production in the first lactation can lead to genetic gains on longevity, although not expressive.
650 $aDairy cattle
650 $aGenetic correlation
650 $aLongevity
653 $aAge at first calving
700 1 $aCOBUCI, J. A.
700 1 $aCOSTA, C. N.
700 1 $aABREU, L. R. A.
700 1 $aMOTA, L. F. M.
700 1 $aPIRES, A. V.
700 1 $aVILLELA, S. D. J.
700 1 $aMARTINS, P. G. M. A.
773 $tAnimal Production Science$gv. 58, n. 10, p. 1788-1793, 2017.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com cnpgc.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Gado de Corte; Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
28/09/2011 |
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Data da última atualização: |
15/02/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
TEIXEIRA, H. C. A.; NASCIMENTO, N. V. do; McMANUS, C.; EGITO, A. A. do; MARIANTE, A. da S.; RAMOS, A. F. |
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Afiliação: |
HEITOR CASTRO ALVES TEIXEIRA, UNB; NORMANDES VIEIRA DO NASCIMENTO, CENARGEN; C. McManus, INCT IGSB, Faculty of Agronomy and Veterinary Medicine, University of Brasília, 70910-970 Brasília-DF, Brazil c Departament of Animal Science, Federal University of Rio Grande do Sul, 91540-000 Porto Alegre-RS, Brazil; ANDREA ALVES DO EGITO, CNPGC; ARTHUR DA SILVA MARIANTE, CENARGEN; ALEXANDRE FLORIANI RAMOS, CENARGEN. |
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Título: |
Seasonal influence on semen traits and freezability from locally adapted Curraleiro bulls. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Animal Reproduction Science, v.125, p. 56-61, May 2011. Issues 1-4. |
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Idioma: |
Inglês |
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Conteúdo: |
Studies were conducted to characterize the effect of season of the year on testicular morphology, fresh and frozen/thawed semen quality from Curraleiro (Pé-duro) bulls in the Brazilian Central west region. Five adult, healthy bulls underwent an andrological examination and semen collection using an electroejaculator, once a month for a year. Fresh and thawed semen were evaluated for progressive sperm motility and sperm vigor, sperm morphology and acrosomal integrity. Testicular length and volume were less (P < 0.05) in April than in the other months of the year. For fresh semen, the ejaculate in April had less volume and sperm concentration (P < 0.05), while sperm vigor was less (P < 0.05) in June, increasing in January and February. With the frozen/thawed semen, the proportion of sperm was greater (P < 0.05) in April to July, decreasing from October to December. Semen collected in December had the greatest (P < 0.05) proportion of major defects while that collected in February/March had the highest proportion of minor defects. The proportion of live intact sperm reduced progressively from December to April/May. The marginal influence of the time of the year on testicular biometry and fresh semen in Curraleiro bulls shows the adaptation of this breed to the environmental conditions in the region. Thus, reproduction with natural mating should be successful at any time of year. For frozen semen collection for conservation programs, the best time of year is from June to September. MenosStudies were conducted to characterize the effect of season of the year on testicular morphology, fresh and frozen/thawed semen quality from Curraleiro (Pé-duro) bulls in the Brazilian Central west region. Five adult, healthy bulls underwent an andrological examination and semen collection using an electroejaculator, once a month for a year. Fresh and thawed semen were evaluated for progressive sperm motility and sperm vigor, sperm morphology and acrosomal integrity. Testicular length and volume were less (P < 0.05) in April than in the other months of the year. For fresh semen, the ejaculate in April had less volume and sperm concentration (P < 0.05), while sperm vigor was less (P < 0.05) in June, increasing in January and February. With the frozen/thawed semen, the proportion of sperm was greater (P < 0.05) in April to July, decreasing from October to December. Semen collected in December had the greatest (P < 0.05) proportion of major defects while that collected in February/March had the highest proportion of minor defects. The proportion of live intact sperm reduced progressively from December to April/May. The marginal influence of the time of the year on testicular biometry and fresh semen in Curraleiro bulls shows the adaptation of this breed to the environmental conditions in the region. Thus, reproduction with natural mating should be successful at any time of year. For frozen semen collection for conservation programs, the best time of year is from June to Septemb... Mostrar Tudo |
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Palavras-Chave: |
Curraleiro. |
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Thesagro: |
Recurso Genético; Reprodução Animal; Touro. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02202naa a2200229 a 4500
001 1901882
005 2023-02-15
008 2011 bl uuuu u00u1 u #d
100 1 $aTEIXEIRA, H. C. A.
245 $aSeasonal influence on semen traits and freezability from locally adapted Curraleiro bulls.$h[electronic resource]
260 $c2011
520 $aStudies were conducted to characterize the effect of season of the year on testicular morphology, fresh and frozen/thawed semen quality from Curraleiro (Pé-duro) bulls in the Brazilian Central west region. Five adult, healthy bulls underwent an andrological examination and semen collection using an electroejaculator, once a month for a year. Fresh and thawed semen were evaluated for progressive sperm motility and sperm vigor, sperm morphology and acrosomal integrity. Testicular length and volume were less (P < 0.05) in April than in the other months of the year. For fresh semen, the ejaculate in April had less volume and sperm concentration (P < 0.05), while sperm vigor was less (P < 0.05) in June, increasing in January and February. With the frozen/thawed semen, the proportion of sperm was greater (P < 0.05) in April to July, decreasing from October to December. Semen collected in December had the greatest (P < 0.05) proportion of major defects while that collected in February/March had the highest proportion of minor defects. The proportion of live intact sperm reduced progressively from December to April/May. The marginal influence of the time of the year on testicular biometry and fresh semen in Curraleiro bulls shows the adaptation of this breed to the environmental conditions in the region. Thus, reproduction with natural mating should be successful at any time of year. For frozen semen collection for conservation programs, the best time of year is from June to September.
650 $aRecurso Genético
650 $aReprodução Animal
650 $aTouro
653 $aCurraleiro
700 1 $aNASCIMENTO, N. V. do
700 1 $aMcMANUS, C.
700 1 $aEGITO, A. A. do
700 1 $aMARIANTE, A. da S.
700 1 $aRAMOS, A. F.
773 $tAnimal Reproduction Science$gv.125, p. 56-61, May 2011. Issues 1-4.
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Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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