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| 14. |  | OLIVEIRA, D. E.; MEDEIROS, S. R. de; LANNA, D. P. D. Nitrogen balance and excretion from grazing lactating cows supplemented with conjugated linoleic acid (CLA). In: ADSA-PSA-AMPA-ASAS JOINT ANNUAL MEETING, 2008, Indianapolis. Abstracts. Indianapolis: ADSA: ASAS, 2008. Disponível em:< http://adsa.asas.org/meetings/2008/abstracts/TOC.htm > Acesso em: 26 mar. 2009. Publicado em: Journal of Animal Science, Champaign, v. 86, E-Supplement 2; Journal of Dairy Science, Champaign, v. 91, E-Supplement 1. P. 487 1 CD-ROM. Ruminant Nutrition: proteins and amino acids - Dairy. O485. Trabalho TH253.| Biblioteca(s): Embrapa Gado de Corte. |
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| 20. | | BERNDT, A.; LANNA, D. P. D.; CRUZ, G. M. da; TULLIO, R. R.; SAKAMOTO, L. S.; ALENCAR, M. M. de. Prediction of the chemical body composition of Nellore and crossbreed bulls. Journal of Animal Science, v. 95, n. 9, p. 3932-3939, 2017.| Biblioteca(s): Embrapa Pecuária Sudeste. |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
10/10/2007 |
|
Data da última atualização: |
29/09/2022 |
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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: |
COBUCI, J. A.; EUCLYDES, R. F.; COSTA, C. N.; TORRES, R. de A.; LOPES, P. S.; PEREIRA, C. S. |
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Afiliação: |
Jaime Araújo Cobuci, UFRGS; Ricardo Frederico Euclydes, UFV; Cláudio Napolis Costa, Embrapa Gado de Leite; Robledo de Almeida Torres, UFV; Paulo Sávio Lopes, UFV; Carmem Silva Pereira, UFV. |
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Título: |
Genetic evaluation for persistency of lactation in Holstein cows using a random regression model. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Genetics and Molecular Biology, Ribeirão Preto, v. 30, n. 2, p. 349-355, 2007. |
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DOI: |
https://doi.org/10.1590/S1415-47572007000300009 |
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Idioma: |
Inglês |
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Conteúdo: |
A model for analyzing test day records including both fixed and random coefficients was applied to the genetic evaluation of first lactation data for Holstein cows. Data comprising 87045 test-day milk yield records from calving between 1997 and 2001 from Holstein herds in 10 regions of the Brazilian state of Minas Gerais. Six persistency of lactation measures were evaluated using breeding values obtained by random regression analyses. The Wilmink function was used to model the additive genetic and permanent environmental effects. Residual variance was constant throughout lactation. Ranking for animals did not change among criteria for persistency measurements, but ranking changes were observed when the estimated breeding value (EBV) for persistency of lactation was contrasted with those estimated for 305-day milk yield (305MY). The rank correlation estimates for persistency of lactation and 305MY were practically the same for sire and cows, and ranged from -0.45 to 0.69. The EBVs for milk yield during lactation for sires producing daughters with superior 305MY indicate genetic differences between sires regarding their ability to transmit desirable persistency of lactation traits. This suggests that selection for total lactation milk yield does not identify sires or cows that are genetically superior in regard to persistency of lactation. Genetic evaluation for persistency of lactation is important for improving the efficiency of the milk production capacity of Holstein cows. |
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Palavras-Chave: |
Genetic evaluation; persistency of lactation; random regression models; rank correlation. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/595956/1/Genetic-evaluation-for-persistency-of-lactation-in-Holstein-cows-using-a-random-regression-model.pdf
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Marc: |
LEADER 02295naa a2200241 a 4500
001 1595956
005 2022-09-29
008 2007 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1590/S1415-47572007000300009$2DOI
100 1 $aCOBUCI, J. A.
245 $aGenetic evaluation for persistency of lactation in Holstein cows using a random regression model.$h[electronic resource]
260 $c2007
520 $aA model for analyzing test day records including both fixed and random coefficients was applied to the genetic evaluation of first lactation data for Holstein cows. Data comprising 87045 test-day milk yield records from calving between 1997 and 2001 from Holstein herds in 10 regions of the Brazilian state of Minas Gerais. Six persistency of lactation measures were evaluated using breeding values obtained by random regression analyses. The Wilmink function was used to model the additive genetic and permanent environmental effects. Residual variance was constant throughout lactation. Ranking for animals did not change among criteria for persistency measurements, but ranking changes were observed when the estimated breeding value (EBV) for persistency of lactation was contrasted with those estimated for 305-day milk yield (305MY). The rank correlation estimates for persistency of lactation and 305MY were practically the same for sire and cows, and ranged from -0.45 to 0.69. The EBVs for milk yield during lactation for sires producing daughters with superior 305MY indicate genetic differences between sires regarding their ability to transmit desirable persistency of lactation traits. This suggests that selection for total lactation milk yield does not identify sires or cows that are genetically superior in regard to persistency of lactation. Genetic evaluation for persistency of lactation is important for improving the efficiency of the milk production capacity of Holstein cows.
653 $aGenetic evaluation
653 $apersistency of lactation
653 $arandom regression models
653 $arank correlation
700 1 $aEUCLYDES, R. F.
700 1 $aCOSTA, C. N.
700 1 $aTORRES, R. de A.
700 1 $aLOPES, P. S.
700 1 $aPEREIRA, C. S.
773 $tGenetics and Molecular Biology, Ribeirão Preto$gv. 30, n. 2, p. 349-355, 2007.
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Embrapa Gado de Leite (CNPGL) |
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