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| Registros recuperados : 144 | |
| 1. |  | AMADO, T. J. C.; FERNANDES, S. V.; BAYER, C.; MIELNICZUK, J. Dinâmica do nitrogênio em sistemas de preparo do solo e de cultura. IN: CONGRESSO BRASILEIRO DE CIÊNÇIA DO SOLO, 25., 1995, Viçosa, MG. Resumos expandidos. Viçosa: UFV, 1995. v.4, p. 1904-1906.| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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| 4. | | BAYER, C.; MARTIN NETO, L.; MIELNICZUK, J.; PAVINATO, A. Armazenamento de carbono em frações lábeis da matéria orgânica de um Latossolo Vermelho sob plantio direto. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 39, n. 7, p. 677-683, jul. 2004 Título em inglês: Carbon storage in labile fractions of soil organic matter in a tropical no-tillage Oxisol.| Biblioteca(s): Embrapa Rondônia; Embrapa Unidades Centrais. |
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| 5. | | BAYER, C.; MARTIN-NETO, L.; MIELNICZUK, J. Qualidade da matéria orgânica e os fatores determinantes da sua estabilidade num solo franco-arenoso submetido a diferentes sistemas de uso e manejo. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 26., 1999, Brasília, DF. Ciência do solo qualidade de vida. Brasília: Embrapa Cerrados; Sociedade Brasileira de Ciência do Solo, 1999. Não paginado, ref. T1666-1, painel: C-5. Resumo. 1 CD-ROM.| Biblioteca(s): Embrapa Instrumentação. |
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| 11. | | BAYER, C.; MARTIN-NETO, L.; MIELNICZUK, J.; DIECKOW, J.; AMADO, T. J. C. C and N stocks and the role of molecular recalcitrance and organomineral interaction in stabilizing soil organic matter in a subtropical acrisol managed under no-tillage. Geoderma, Amsterdam, v. 133, n. 3-4, p. 258-2668, 2006.| Biblioteca(s): Embrapa Instrumentação. |
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| 12. | | BAYER, C.; MARTIN-NETO, L.; MIELNICZUK, J.; MILORI, D. M. P.; BAGNATO, V. S.; SAAB, S. da C. Tillage and cropping systems effects on soil humic acids characterstics as determined by electron spin resonace and fluorescence spectroscopies. In: INTERNATIONAL MEETING OF THE INTERNATIONAL HUMIC SUBSTANCES SOCIETY-IHSS, 10., 2000, Toulouse, France. Entering the third millenium with a common approach to humic substances and organic matter in water, soil and sediments: proceedings... [S.l.]: IHSS, 2000. v.1, p. 175-178.| Biblioteca(s): Embrapa Instrumentação. |
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| 13. | | BAYER, C.; MARTIN-NETO, L.; MIELNICZUK, J.; PAVINATO, A.; DIECKOW, J. Carbon sequestration in two brazilian cerrado soils under no-till. Soil & Tillage Research, Amsterdam, v. 86, n. 2, p. 237-245, 2006.| Biblioteca(s): Embrapa Instrumentação. |
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| 15. | | BAYER, C.; MARTIN-NETO, L.; MIELNICZUK, J.; SAAB, S. da C. MILORI, D. M. P.; BAGNATO, V. S. Tillage and cropping system effects on soil humic acid characteristics as determined by electron spin resonance and fluorescence spectroscopies. Geoderma, Amsterdam, v. 105, p. 81-92, 2002.| Biblioteca(s): Embrapa Instrumentação. |
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| 17. | | BAYER, C.; MIELNICZUK, J.; AMADO, T. J. C.; MARTIN-NETO, L.; FERNANDES, S. V. Organic matter storage in a sandy clay loam Acrisol affected by tillage and cropping systems in southern Brazil. Soil & Tillage Research, Amsterdam, v. 54, n. 1/2, p. 101-109, Marc. 2000.| Biblioteca(s): Embrapa Instrumentação; Embrapa Pantanal. |
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| Registros recuperados : 144 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
19/10/2018 |
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Data da última atualização: |
11/01/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
SCALEZ, D. C. B.; FRAGOMENI, B. de O.; SANTOS, D. C. C. dos; PASSAFARO, T. L.; ALENCAR, M. M. de; TORAL. F. L. B. |
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Afiliação: |
Daiane Cristina Becker Scalez, UFMT; Breno de Oliveira Fragomeni, UFMG; Dalinne Chrystian Carvalho dos Santos, UFMG; Tiago Luciano Passafaro, UFMG; MAURICIO MELLO DE ALENCAR, CPPSE; Fabio Luiz Buranelo Toral, UFMG. |
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Título: |
Random regression models with B-splines to estimate genetic parameters for body weight of young bulls in performance tests. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Revista Brasileira de Zootecnia, v. 47, p. 1-9, 2018. |
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DOI: |
10.1590/rbz4720150300 |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to estimate genetic parameters for body weight of beef cattle in performance tests. Different random regression models with quadratic B-splines and heterogeneous residual variance were fitted to estimate covariance functions for body weights of Nellore and crossbred Charolais × Nellore bulls. The criteria −2 residual log-likelihood (−2RLL), Akaike Information Criterion (AIC), and consistent AIC (CAIC) were used to choose the most appropriate model. For Nellore bulls, residual variance was modeled with six classes of age, and direct additive genetic and permanent environment effects were modeled with quadratic B-splines with two and one intervals, respectively. For crossbred bulls, quadratic B-splines with one interval fitted direct additive genetic and permanent environment effects and nine classes of age were needed to fit residual variance. Pooling classes of age with up to 40% in difference of residual variances does not compromise the fit of the model. Heritability for body weight in performance tests are moderate (>0.25, for crossbred bulls) to high (>0.5, for Nellore bulls) and genetic correlation between weights over the test are also high (>0.65). Then, selection of young bulls in performance test is an efficient tool to increase body weight in beef cattle. |
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Palavras-Chave: |
Bovinos de corte. |
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Thesagro: |
Gado de Corte. |
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Thesaurus NAL: |
Animal breeding; Beef cattle; Genetic correlation. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/184758/1/RamdomRegressionModels.pdf
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Marc: |
LEADER 02136naa a2200253 a 4500
001 2097795
005 2019-01-11
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1590/rbz4720150300$2DOI
100 1 $aSCALEZ, D. C. B.
245 $aRandom regression models with B-splines to estimate genetic parameters for body weight of young bulls in performance tests.$h[electronic resource]
260 $c2018
520 $aThe objective of this study was to estimate genetic parameters for body weight of beef cattle in performance tests. Different random regression models with quadratic B-splines and heterogeneous residual variance were fitted to estimate covariance functions for body weights of Nellore and crossbred Charolais × Nellore bulls. The criteria −2 residual log-likelihood (−2RLL), Akaike Information Criterion (AIC), and consistent AIC (CAIC) were used to choose the most appropriate model. For Nellore bulls, residual variance was modeled with six classes of age, and direct additive genetic and permanent environment effects were modeled with quadratic B-splines with two and one intervals, respectively. For crossbred bulls, quadratic B-splines with one interval fitted direct additive genetic and permanent environment effects and nine classes of age were needed to fit residual variance. Pooling classes of age with up to 40% in difference of residual variances does not compromise the fit of the model. Heritability for body weight in performance tests are moderate (>0.25, for crossbred bulls) to high (>0.5, for Nellore bulls) and genetic correlation between weights over the test are also high (>0.65). Then, selection of young bulls in performance test is an efficient tool to increase body weight in beef cattle.
650 $aAnimal breeding
650 $aBeef cattle
650 $aGenetic correlation
650 $aGado de Corte
653 $aBovinos de corte
700 1 $aFRAGOMENI, B. de O.
700 1 $aSANTOS, D. C. C. dos
700 1 $aPASSAFARO, T. L.
700 1 $aALENCAR, M. M. de
700 1 $aTORAL. F. L. B.
773 $tRevista Brasileira de Zootecnia$gv. 47, p. 1-9, 2018.
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Embrapa Pecuária Sudeste (CPPSE) |
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