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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Suínos e Aves. Para informações adicionais entre em contato com cnpsa.biblioteca@embrapa.br. |
Registro Completo |
Biblioteca(s): |
Embrapa Suínos e Aves. |
Data corrente: |
28/09/2012 |
Data da última atualização: |
01/10/2012 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
VENTURINI, G. C.; GROSSI, D. do A.; RAMOS, S. B.; CRUZ, A. A. R. da; SOUZA, C. G.; LEDUR, M. C.; EL FARO, L.; SCHMIDT, G. S.; MUNARI, D. P. |
Afiliação: |
GUILHERME COSTA VENTURINI, UNESP; DANIELA DO AMARAL GROSSI, UNESP; SALVADOR BOCCALETTI RAMOS, UNESP; VALDECI APARECIDA ROCHA DA CRUZ, UNESP; UNESP; MONICA CORREA LEDUR, CNPSA; LENIRA EL FARO, Agência Paulista de Tecnologia dos Alimentos; GILBERTO SILBER SCHMIDT, SRI; DANÍSIO PRADO MUNARI, UNESP. |
Título: |
Estimation of genetic parameters for partial egg production periods by means of random regression models. |
Ano de publicação: |
2012 |
Fonte/Imprenta: |
Genetics and Molecular Research, v. 11, n. 3, p. 1819-1829, 2012. |
Idioma: |
Português |
Notas: |
Projeto: 01.06.01.006. |
Conteúdo: |
We estimated genetic parameters for egg production in different periods by means of random regression models, aiming at selection based on partial egg production from a generation of layers. The production was evaluated for each individual by recording the number of eggs produced from 20 to 70 weeks of age, with partial records taken every three weeks for a total of 17 periods. The covariance functions were estimated with a random regression model by the restricted maximum likelihood method. A model composed of third-order polynomials for the additive effect, ninth-order polynomials for the permanent environment, and a residual variance structure with five distinct classes, was found to be most suitable for adjusting the egg production data for laying hens. The heritability estimates varied from 0.04 to 0.14. The genetic correlations were all positive, varying from 0.10 to 0.99. Selection applied in partial egg production periods will result in greater genetic profit for the adjacent 1820 periods. However, as the distance in time between periods increases, selection becomes less efficient. Selection based on the second period (23 to 25 weeks of age), where greater heritability was estimated, would note benefit the final egg-laying cycle periods. |
Palavras-Chave: |
Dados longitudinais; Produção de ovo; Regressão aleatória. |
Thesagro: |
Genética. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02101naa a2200277 a 4500 001 1935078 005 2012-10-01 008 2012 bl uuuu u00u1 u #d 100 1 $aVENTURINI, G. C. 245 $aEstimation of genetic parameters for partial egg production periods by means of random regression models.$h[electronic resource] 260 $c2012 500 $aProjeto: 01.06.01.006. 520 $aWe estimated genetic parameters for egg production in different periods by means of random regression models, aiming at selection based on partial egg production from a generation of layers. The production was evaluated for each individual by recording the number of eggs produced from 20 to 70 weeks of age, with partial records taken every three weeks for a total of 17 periods. The covariance functions were estimated with a random regression model by the restricted maximum likelihood method. A model composed of third-order polynomials for the additive effect, ninth-order polynomials for the permanent environment, and a residual variance structure with five distinct classes, was found to be most suitable for adjusting the egg production data for laying hens. The heritability estimates varied from 0.04 to 0.14. The genetic correlations were all positive, varying from 0.10 to 0.99. Selection applied in partial egg production periods will result in greater genetic profit for the adjacent 1820 periods. However, as the distance in time between periods increases, selection becomes less efficient. Selection based on the second period (23 to 25 weeks of age), where greater heritability was estimated, would note benefit the final egg-laying cycle periods. 650 $aGenética 653 $aDados longitudinais 653 $aProdução de ovo 653 $aRegressão aleatória 700 1 $aGROSSI, D. do A. 700 1 $aRAMOS, S. B. 700 1 $aCRUZ, A. A. R. da 700 1 $aSOUZA, C. G. 700 1 $aLEDUR, M. C. 700 1 $aEL FARO, L. 700 1 $aSCHMIDT, G. S. 700 1 $aMUNARI, D. P. 773 $tGenetics and Molecular Research$gv. 11, n. 3, p. 1819-1829, 2012.
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Embrapa Suínos e Aves (CNPSA) |
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![](/consulta/web/img/deny.png) | 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
Biblioteca(s): |
Embrapa Gado de Corte. |
Data corrente: |
09/08/1995 |
Data da última atualização: |
09/07/2009 |
Autoria: |
VALLE, C. B. do; CALIXTO, S.; AMEZQUITA, M. C. |
Afiliação: |
EMBRAPA. Centro Nacional de Pesquisa de Gado de Corte (Campo Grande,MS). |
Título: |
Agronomic evaluation of Brachiaria germplasm in Brazil. |
Ano de publicação: |
1993 |
Fonte/Imprenta: |
In: INTERNATIONAL GRASSLAND CONGRESS, 17., 1993, Palmerston North. Proceedings... Palmerston North: New Zealand Grassland Association, 1993. |
Volume: |
v. 1. |
Páginas: |
p. 511-512. |
Idioma: |
Inglês |
Palavras-Chave: |
Avaliação agronômica; Basilisk; Brachiaria jubata; Braquiária; Brasil; Marandu; Talo. |
Thesagro: |
Brachiaria Brizantha; Brachiaria Decumbens; Brachiaria Humidicola; Brachiaria Ruziziensis; Cerrado; Clima; Folha; Matéria Seca; Produção; Rebrota; Seleção. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01042naa a2200373 a 4500 001 1321527 005 2009-07-09 008 1993 bl uuuu u00u1 u #d 100 1 $aVALLE, C. B. do 245 $aAgronomic evaluation of Brachiaria germplasm in Brazil. 260 $c1993 300 $ap. 511-512. v. 1. 490 $vv. 1. 650 $aBrachiaria Brizantha 650 $aBrachiaria Decumbens 650 $aBrachiaria Humidicola 650 $aBrachiaria Ruziziensis 650 $aCerrado 650 $aClima 650 $aFolha 650 $aMatéria Seca 650 $aProdução 650 $aRebrota 650 $aSeleção 653 $aAvaliação agronômica 653 $aBasilisk 653 $aBrachiaria jubata 653 $aBraquiária 653 $aBrasil 653 $aMarandu 653 $aTalo 700 1 $aCALIXTO, S. 700 1 $aAMEZQUITA, M. C. 773 $tIn: INTERNATIONAL GRASSLAND CONGRESS, 17., 1993, Palmerston North. Proceedings... Palmerston North: New Zealand Grassland Association, 1993.
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