| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
|
Data corrente: |
05/10/2010 |
|
Data da última atualização: |
30/06/2023 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
BALDI, F.; ALBUQUERQUE, L. G.; ALENCAR, M. M. de. |
|
Afiliação: |
FERNANDO BALDI, UNESP/JABOTICABAL; LUCIA G. ALBUQUERQUE, UNESP/JABOTICABAL; MAURICIO MELLO DE ALENCAR, CPPSE. |
|
Título: |
Random regression models on Legendre polynomials to estimate genetic parameters for weights from birth to adult age in Canchim cattle. |
|
Ano de publicação: |
2010 |
|
Fonte/Imprenta: |
Journal of Animal Breeding and Genetics, v. 127, n. 4, p. 289-299, 2010 |
|
Idioma: |
Português |
|
Conteúdo: |
The objective of this work was to estimate covariance functions for direct and maternal genetic effects, animal and maternal permanent environmental effects, and subsequently, to derive relevant genetic parameters for growth traits in Canchim cattle. Data comprised 49 011 weight records on 2435 females from birth to adult age. The model of analysis included fixed effects of contemporary groups (year and month of birth and at weighing) and age of dam as quadratic covariable. Mean trends were taken into account by a cubic regression on orthogonal polynomials of animal age. Residual variances were allowed to vary and were modelled by a step function with 1, 4 or 11 classes based on animal's age. The model fitting four classes of residual variances was the best. A total of 12 random regression models from second to seventh order were used to model direct and maternal genetic effects, animal and maternal permanent environmental effects. The model with direct and maternal genetic effects, animal and maternal permanent environmental effects fitted by quadric, cubic, quintic and linear Legendre polynomials, respectively, was the most adequate to describe the covariance structure of the data. Estimates of direct and maternal heritability obtained by multi-trait (seven traits) and random regression models were very similar. Selection for higher weight at any age, especially after weaning, will produce an increase in mature cow weight. The possibility to modify the growth curve in Canchim cattle to obtain animals with rapid growth at early ages and moderate to low mature cow weight is limited. MenosThe objective of this work was to estimate covariance functions for direct and maternal genetic effects, animal and maternal permanent environmental effects, and subsequently, to derive relevant genetic parameters for growth traits in Canchim cattle. Data comprised 49 011 weight records on 2435 females from birth to adult age. The model of analysis included fixed effects of contemporary groups (year and month of birth and at weighing) and age of dam as quadratic covariable. Mean trends were taken into account by a cubic regression on orthogonal polynomials of animal age. Residual variances were allowed to vary and were modelled by a step function with 1, 4 or 11 classes based on animal's age. The model fitting four classes of residual variances was the best. A total of 12 random regression models from second to seventh order were used to model direct and maternal genetic effects, animal and maternal permanent environmental effects. The model with direct and maternal genetic effects, animal and maternal permanent environmental effects fitted by quadric, cubic, quintic and linear Legendre polynomials, respectively, was the most adequate to describe the covariance structure of the data. Estimates of direct and maternal heritability obtained by multi-trait (seven traits) and random regression models were very similar. Selection for higher weight at any age, especially after weaning, will produce an increase in mature cow weight. The possibility to modify the growth curve in Canc... Mostrar Tudo |
|
Palavras-Chave: |
Covariance functions; Growth curve; Legendre polynomials. |
|
Thesaurus Nal: |
beef cattle. |
|
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
|
Marc: |
LEADER 02257naa a2200193 a 4500
001 1863661
005 2023-06-30
008 2010 bl uuuu u00u1 u #d
100 1 $aBALDI, F.
245 $aRandom regression models on Legendre polynomials to estimate genetic parameters for weights from birth to adult age in Canchim cattle.$h[electronic resource]
260 $c2010
520 $aThe objective of this work was to estimate covariance functions for direct and maternal genetic effects, animal and maternal permanent environmental effects, and subsequently, to derive relevant genetic parameters for growth traits in Canchim cattle. Data comprised 49 011 weight records on 2435 females from birth to adult age. The model of analysis included fixed effects of contemporary groups (year and month of birth and at weighing) and age of dam as quadratic covariable. Mean trends were taken into account by a cubic regression on orthogonal polynomials of animal age. Residual variances were allowed to vary and were modelled by a step function with 1, 4 or 11 classes based on animal's age. The model fitting four classes of residual variances was the best. A total of 12 random regression models from second to seventh order were used to model direct and maternal genetic effects, animal and maternal permanent environmental effects. The model with direct and maternal genetic effects, animal and maternal permanent environmental effects fitted by quadric, cubic, quintic and linear Legendre polynomials, respectively, was the most adequate to describe the covariance structure of the data. Estimates of direct and maternal heritability obtained by multi-trait (seven traits) and random regression models were very similar. Selection for higher weight at any age, especially after weaning, will produce an increase in mature cow weight. The possibility to modify the growth curve in Canchim cattle to obtain animals with rapid growth at early ages and moderate to low mature cow weight is limited.
650 $abeef cattle
653 $aCovariance functions
653 $aGrowth curve
653 $aLegendre polynomials
700 1 $aALBUQUERQUE, L. G.
700 1 $aALENCAR, M. M. de
773 $tJournal of Animal Breeding and Genetics$gv. 127, n. 4, p. 289-299, 2010
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Milho e Sorgo. |
|
Data corrente: |
19/08/2014 |
|
Data da última atualização: |
19/08/2014 |
|
Tipo da produção científica: |
Resumo em Anais de Congresso |
|
Autoria: |
RIBEIRO, J. L.; SANTOS, G. M. dos; CARVALHO, K. S. de; VIANA, J. H. M.; CURY, J. de C.; COSTA, T. C. e C. da; SOUZA, F. A. de. |
|
Afiliação: |
JOAO HERBERT MOREIRA VIANA, CNPMS; THOMAZ CORREA E CASTRO DA COSTA, CNPMS; FRANCISCO ADRIANO DE SOUZA, CNPMS. |
|
Título: |
Intensidade de micorrização, em solos coletados de fragmentos florestais da transição bioma Cerrado e Mata Atlântica como diagnóstico da qualidade e da recuperação ambiental. |
|
Ano de publicação: |
2014 |
|
Fonte/Imprenta: |
In: CONGRESSO LATINOAMERICANO DE MICROBIOLOGIA, 21., 2014, Santos. Resumos. Santos: Sociedade Brasileira de Microbiologia, 2014. |
|
Idioma: |
Português |
|
Palavras-Chave: |
Fragmento florestal; Micorrização; Mutualismo. |
|
Thesagro: |
Simbiose. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/106798/1/Intensidade-micorrizacao.pdf
|
|
Marc: |
LEADER 00839nam a2200217 a 4500
001 1992930
005 2014-08-19
008 2014 bl uuuu u00u1 u #d
100 1 $aRIBEIRO, J. L.
245 $aIntensidade de micorrização, em solos coletados de fragmentos florestais da transição bioma Cerrado e Mata Atlântica como diagnóstico da qualidade e da recuperação ambiental.$h[electronic resource]
260 $aIn: CONGRESSO LATINOAMERICANO DE MICROBIOLOGIA, 21., 2014, Santos. Resumos. Santos: Sociedade Brasileira de Microbiologia$c2014
650 $aSimbiose
653 $aFragmento florestal
653 $aMicorrização
653 $aMutualismo
700 1 $aSANTOS, G. M. dos
700 1 $aCARVALHO, K. S. de
700 1 $aVIANA, J. H. M.
700 1 $aCURY, J. de C.
700 1 $aCOSTA, T. C. e C. da
700 1 $aSOUZA, F. A. de
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
