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| Registros recuperados : 185 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
13/09/2017 |
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Data da última atualização: |
13/09/2017 |
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Autoria: |
SILVA, D. A. da; SILVA, F. F. e; VENTURA, H. T.; JUNQUEIRA, V. S.; SILVA, A. A. da; MOTA, R. R.; LOPES, P. S. |
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Afiliação: |
Delvan Alves da Silva, Universidade Federal de Viçosa/Departamento de Zootecnia; Fabyano Fonseca e Silva, Universidade Federal de Viçosa/Departamento de Zootecnia; Henrique Torres Ventura, Associação Brasileira dos Criadores de Zebu; Vinícius Silva Junqueira, Universidade Federal de Viçosa/Departamento de Zootecnia; Alessandra Alves da Silva, Universidade Federal de Viçosa/Departamento de Zootecnia; Rodrigo Reis Mota, Gembloux Agro-Bio Tech, Université de Liège; Paulo Sávio Lopes, Universidade Federal de Viçosa/Departamento de Zootecnia. |
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Título: |
Contemporary groups in the genetic evaluation of Nellore cattle using Bayesian inference. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 52, n. 8, p. 643-651, fev. 2017. |
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Idioma: |
Inglês |
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Notas: |
Título em português: Grupos de contemporâneos na avaliação genética de gado Nelore por inferência bayesiana. |
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Conteúdo: |
The objective of this work was to evaluate the criteria for the formation of contemporary groups (CGs) in the genetic evaluation of body weight at weaning in Nellore cattle. A total of 713,474 records from 3,066 herds located in Midwestern and Northern Brazil were used. Data were obtained from the genealogical registry of zebu breeds of the Brazilian association of zebu breeders. Data structures were defined based on the number of standard deviations (SDs) for outlier removal (±2.0, ±2.5, ±3.0, and ±3.5) and on the minimal number of animals per CG (3, 7, and 15). Genetic evaluation was performed with an animal model using Bayesian inference. Data structures with ±3.5 SDs and CG with at least 15 animals presented the highest additive genetic variance (82.65±2.93), and those with ±2.0 SDs and CG with at least 3 animals showed the lowest one (60.23±1.96). The proper formation of CGs results in better-quality data archives, allowing to obtain more trustable estimates for the genetic parameters. Better selection responses are obtained when the following criteria are adopted for the removal of outliers: 2.5, 3.0, and 3.5 standard deviations and a minimum of 15 animals per contemporary group. |
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Palavras-Chave: |
Herdabilidade; Outliers. |
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Thesaurus NAL: |
Heritability; Zebu. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/163764/1/Contemporary-groups-in-the-genetic.pdf
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Marc: |
LEADER 02033naa a2200253 a 4500
001 2075526
005 2017-09-13
008 2017 bl uuuu u00u1 u #d
100 1 $aSILVA, D. A. da
245 $aContemporary groups in the genetic evaluation of Nellore cattle using Bayesian inference.
260 $c2017
500 $aTítulo em português: Grupos de contemporâneos na avaliação genética de gado Nelore por inferência bayesiana.
520 $aThe objective of this work was to evaluate the criteria for the formation of contemporary groups (CGs) in the genetic evaluation of body weight at weaning in Nellore cattle. A total of 713,474 records from 3,066 herds located in Midwestern and Northern Brazil were used. Data were obtained from the genealogical registry of zebu breeds of the Brazilian association of zebu breeders. Data structures were defined based on the number of standard deviations (SDs) for outlier removal (±2.0, ±2.5, ±3.0, and ±3.5) and on the minimal number of animals per CG (3, 7, and 15). Genetic evaluation was performed with an animal model using Bayesian inference. Data structures with ±3.5 SDs and CG with at least 15 animals presented the highest additive genetic variance (82.65±2.93), and those with ±2.0 SDs and CG with at least 3 animals showed the lowest one (60.23±1.96). The proper formation of CGs results in better-quality data archives, allowing to obtain more trustable estimates for the genetic parameters. Better selection responses are obtained when the following criteria are adopted for the removal of outliers: 2.5, 3.0, and 3.5 standard deviations and a minimum of 15 animals per contemporary group.
650 $aHeritability
650 $aZebu
653 $aHerdabilidade
653 $aOutliers
700 1 $aSILVA, F. F. e
700 1 $aVENTURA, H. T.
700 1 $aJUNQUEIRA, V. S.
700 1 $aSILVA, A. A. da
700 1 $aMOTA, R. R.
700 1 $aLOPES, P. S.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 52, n. 8, p. 643-651, fev. 2017.
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Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
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