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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; Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
06/11/2019 |
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Data da última atualização: |
06/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, A. A.; SILVA, D. A.; SILVA, F. F.; COSTA, C. N.; LOPES, P. S.; CAETANO, A. R.; THOMPSON, G.; CARVALHEIRA, J. |
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Afiliação: |
A. A. SILVA, UFV; D. A. SILVA, UFV; F. F. SILVA, UFV; CLAUDIO NAPOLIS COSTA, CNPGL; P. S. LOPES, UFV; ALEXANDRE RODRIGUES CAETANO, Cenargen; G. THOMPSON, CIBIO-INBIO, UNIVERSITY OF PORTO, PORTUGAL; J. CARVALHEIRA, CIBIO-INBIO, UNIVERSITY OF PORTO, PORTUGAL. |
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Título: |
Autoregressive single-step test-day model for genomic evaluations of Portuguese Holstein cattle. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Journal of Dairy Science, v. 102, n. 7, p. 6330-6339, 2019. |
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DOI: |
10.3168/jds.2018-15191 |
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Idioma: |
Inglês |
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Conteúdo: |
The multiple-lactation autoregressive test-day (AR) model is the adopted model for the national genetic evaluation of dairy cattle in Portugal. Under this model, animals' permanent environment effects are assumed to follow a first-order autoregressive process over the long (auto-correlations between parities) and short (auto-correlations between test-days within lactation) terms. Given the relevance of genomic prediction in dairy cattle, it is essential to include marker information in national genetic evaluations. In this context, we aimed to evaluate the feasibility of applying the single-step genomic (G)BLUP to analyze milk yield using the AR model in Portuguese Holstein cattle. In total, 11,434,294 test-day records from the first 3 lactations collected between 1994 and 2017 and 1,071 genotyped bulls were used in this study. Rank correlations and differences in reliability among bulls were used to compare the performance of the traditional (A-AR) and single-step (H-AR) models. These 2 modeling approaches were also applied to reduced data sets with records truncated after 2012 (deleting daughters of tested bulls) to evaluate the predictive ability of the H-AR. Validation scenarios were proposed, taking into account young and proven bulls. Average EBV reliabilities, empirical reliabilities, and genetic trends predicted from the complete and reduced data sets were used to validate the genomic evaluation. Average EBV reliabilities for H-AR (A-AR) using the complete data set were 0.52 (0.16) and 0.72 (0.62) for genotyped bulls with no daughters and bulls with 1 to 9 daughters, respectively. These results showed an increase in EBV reliabilities of 0.10 to 0.36 when genomic information was included, corresponding to a reduction of up to 43% in prediction error variance. Considering the 3 validation scenarios, the inclusion of genomic information improved the average EBV reliability in the reduced data set, which ranged, on average, from 0.16 to 0.26, indicating an increase in the predictive ability. Similarly, empirical reliability increased by up to 0.08 between validation tests. The H-AR outperformed A-AR in terms of genetic trends when unproven genotyped bulls were included. The results suggest that the single-step GBLUP AR model is feasible and may be applied to national Portuguese genetic evaluations for milk yield. MenosThe multiple-lactation autoregressive test-day (AR) model is the adopted model for the national genetic evaluation of dairy cattle in Portugal. Under this model, animals' permanent environment effects are assumed to follow a first-order autoregressive process over the long (auto-correlations between parities) and short (auto-correlations between test-days within lactation) terms. Given the relevance of genomic prediction in dairy cattle, it is essential to include marker information in national genetic evaluations. In this context, we aimed to evaluate the feasibility of applying the single-step genomic (G)BLUP to analyze milk yield using the AR model in Portuguese Holstein cattle. In total, 11,434,294 test-day records from the first 3 lactations collected between 1994 and 2017 and 1,071 genotyped bulls were used in this study. Rank correlations and differences in reliability among bulls were used to compare the performance of the traditional (A-AR) and single-step (H-AR) models. These 2 modeling approaches were also applied to reduced data sets with records truncated after 2012 (deleting daughters of tested bulls) to evaluate the predictive ability of the H-AR. Validation scenarios were proposed, taking into account young and proven bulls. Average EBV reliabilities, empirical reliabilities, and genetic trends predicted from the complete and reduced data sets were used to validate the genomic evaluation. Average EBV reliabilities for H-AR (A-AR) using the complete data set w... Mostrar Tudo |
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Palavras-Chave: |
Autoregressive test-day model; Holstein cattle; Single-step genomic BLUP. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03130naa a2200253 a 4500
001 2129209
005 2024-02-06
008 2019 bl uuuu u00u1 u #d
024 7 $a10.3168/jds.2018-15191$2DOI
100 1 $aSILVA, A. A.
245 $aAutoregressive single-step test-day model for genomic evaluations of Portuguese Holstein cattle.$h[electronic resource]
260 $c2019
520 $aThe multiple-lactation autoregressive test-day (AR) model is the adopted model for the national genetic evaluation of dairy cattle in Portugal. Under this model, animals' permanent environment effects are assumed to follow a first-order autoregressive process over the long (auto-correlations between parities) and short (auto-correlations between test-days within lactation) terms. Given the relevance of genomic prediction in dairy cattle, it is essential to include marker information in national genetic evaluations. In this context, we aimed to evaluate the feasibility of applying the single-step genomic (G)BLUP to analyze milk yield using the AR model in Portuguese Holstein cattle. In total, 11,434,294 test-day records from the first 3 lactations collected between 1994 and 2017 and 1,071 genotyped bulls were used in this study. Rank correlations and differences in reliability among bulls were used to compare the performance of the traditional (A-AR) and single-step (H-AR) models. These 2 modeling approaches were also applied to reduced data sets with records truncated after 2012 (deleting daughters of tested bulls) to evaluate the predictive ability of the H-AR. Validation scenarios were proposed, taking into account young and proven bulls. Average EBV reliabilities, empirical reliabilities, and genetic trends predicted from the complete and reduced data sets were used to validate the genomic evaluation. Average EBV reliabilities for H-AR (A-AR) using the complete data set were 0.52 (0.16) and 0.72 (0.62) for genotyped bulls with no daughters and bulls with 1 to 9 daughters, respectively. These results showed an increase in EBV reliabilities of 0.10 to 0.36 when genomic information was included, corresponding to a reduction of up to 43% in prediction error variance. Considering the 3 validation scenarios, the inclusion of genomic information improved the average EBV reliability in the reduced data set, which ranged, on average, from 0.16 to 0.26, indicating an increase in the predictive ability. Similarly, empirical reliability increased by up to 0.08 between validation tests. The H-AR outperformed A-AR in terms of genetic trends when unproven genotyped bulls were included. The results suggest that the single-step GBLUP AR model is feasible and may be applied to national Portuguese genetic evaluations for milk yield.
653 $aAutoregressive test-day model
653 $aHolstein cattle
653 $aSingle-step genomic BLUP
700 1 $aSILVA, D. A.
700 1 $aSILVA, F. F.
700 1 $aCOSTA, C. N.
700 1 $aLOPES, P. S.
700 1 $aCAETANO, A. R.
700 1 $aTHOMPSON, G.
700 1 $aCARVALHEIRA, J.
773 $tJournal of Dairy Science$gv. 102, n. 7, p. 6330-6339, 2019.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Biblioteca |
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Registro Completo
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Biblioteca(s): |
Embrapa Rondônia. |
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Data corrente: |
11/01/2008 |
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Data da última atualização: |
18/03/2009 |
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Tipo da produção científica: |
Artigo de Divulgação na Mídia |
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Circulação/Nível: |
-- - -- |
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Autoria: |
BRITO, L. G. |
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Afiliação: |
Luciana Gatto Brito, Embrapa Rondônia. |
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Título: |
Carrapatograma: um aliado do produtor na exploração leiteira. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Proleite, Porto Velho, v. 1. n. 1, dez. 2007. |
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Idioma: |
Português |
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Notas: |
Demais veículos onde o artigo foi publicado: Notícia na Hora; ZooNews; Ariquemes190; O combatente; Impacto Rondônia; O Guaporé; ClicRondônia; Rehagro; Portal do Agronegócio. |
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Conteúdo: |
A perda econômica decorrente da presença do carrapato Boophilus microplus e das patologias por ele transmitidas, não é o único problema presente nas explorações pecuárias, uma vez que o uso indiscriminado de princípios acaricidas vem acarretando à poluição de mananciais e coleções de água, assim como a contaminação dos produtos de origem animal, sendo o leite a matéria-prima de maior probabilidade de contaminação por substâncias carrapaticidas, uma vez que se observa o uso indiscriminado e sem critério técnico destas substâncias na maioria dos rebanhos leiteiros do país, expondo a contaminação também aqueles que aplicam os fármacos utilizados no controle dos carrapatos sobre os bovinos. |
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Palavras-Chave: |
Carrapatograma. |
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Thesagro: |
Carrapato; Gado Leiteiro; Produção Leiteira. |
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Categoria do assunto: |
-- |
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URL: |
https://www.agrosoft.org.br/agropag/103589.htm
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Marc: |
LEADER 01374naa a2200181 a 4500
001 1700713
005 2009-03-18
008 2007 bl --- 0-- u #d
100 1 $aBRITO, L. G.
245 $aCarrapatograma$bum aliado do produtor na exploração leiteira.
260 $c2007
500 $aDemais veículos onde o artigo foi publicado: Notícia na Hora; ZooNews; Ariquemes190; O combatente; Impacto Rondônia; O Guaporé; ClicRondônia; Rehagro; Portal do Agronegócio.
520 $aA perda econômica decorrente da presença do carrapato Boophilus microplus e das patologias por ele transmitidas, não é o único problema presente nas explorações pecuárias, uma vez que o uso indiscriminado de princípios acaricidas vem acarretando à poluição de mananciais e coleções de água, assim como a contaminação dos produtos de origem animal, sendo o leite a matéria-prima de maior probabilidade de contaminação por substâncias carrapaticidas, uma vez que se observa o uso indiscriminado e sem critério técnico destas substâncias na maioria dos rebanhos leiteiros do país, expondo a contaminação também aqueles que aplicam os fármacos utilizados no controle dos carrapatos sobre os bovinos.
650 $aCarrapato
650 $aGado Leiteiro
650 $aProdução Leiteira
653 $aCarrapatograma
773 $tProleite, Porto Velho$gv. 1. n. 1, dez. 2007.
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Registro original: |
Embrapa Rondônia (CPAF-RO) |
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