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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
14/01/2019 |
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Data da última atualização: |
24/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
AZEVEDO JUNIOR, J.; GONÇALVES, T. de M.; SOUZA, J. C. de; RODRIGUEZ, M. A. P.; COSTA, C. N.; CARVALHEIRA, J. G. V. |
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Afiliação: |
Jairo Azevedo Junior, UFLA; Tarcisio de Moraes Gonçalves, UFLA; José Camisão de Souza, UFLA; Mary Ana Petersen Rodriguez, Universidade Estadual de Montes Claros; CLAUDIO NAPOLIS COSTA, CNPGL; Julio Gil Vale Carvalheira, Universidade do Porto, Portugal. |
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Título: |
Adjustment of lactation curves of Holstein cows from herds of Minas Gerais, Brazil. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Journal of Agricultural Science, v. 10, n. 2, 2018. |
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Páginas: |
14 p. |
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DOI: |
10.5539/jas.v10n2p1 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract Random regression models (RRM) differ in terms of the functions used to describe the shape of lactation curves. The aim was to compare random regression models under different functions to describe the lactation curves from Holstein cows in herds of the state of Minas Gerais. A database of 28,118 production records was analyzed using the test-day records of 4,230 first parity cows from five herds. The Wilmink, Ali & Schaeffer and Legendre polynomial (orders 4, 5 and 6) functions were adjusted in RRM to model the mean production trend (fixed) and genetic and permanent environmental (random) effects. The residual variances were assumed to be constant throughout lactation. Analyses were performed using the AIREMLF90 program. Except for the model with the polynomial function of order 5, all models converged. The Wilmink function showed lower values for criteria based on the -2log (L), AIC and BIC. The model with the Legendre polynomial of order 6 showed lower residual variance. Heritability estimates were similar between functions, ranging from 0.07 to 0.18 and were higher from 215 days of lactation. From 155 days of lactation, genetic and permanent environmental correlations between successive controls are of high magnitude. The Wilmink function is the most suitable for the study of milk yields from primiparous Holstein cows. The selection of animals is possible from 155 days of lactation on. Permanent environmental effects have greater influence on the milk production at the end of lactation of primiparous cows and should be considered since they are important and may be cumulative throughout lactation. MenosAbstract Random regression models (RRM) differ in terms of the functions used to describe the shape of lactation curves. The aim was to compare random regression models under different functions to describe the lactation curves from Holstein cows in herds of the state of Minas Gerais. A database of 28,118 production records was analyzed using the test-day records of 4,230 first parity cows from five herds. The Wilmink, Ali & Schaeffer and Legendre polynomial (orders 4, 5 and 6) functions were adjusted in RRM to model the mean production trend (fixed) and genetic and permanent environmental (random) effects. The residual variances were assumed to be constant throughout lactation. Analyses were performed using the AIREMLF90 program. Except for the model with the polynomial function of order 5, all models converged. The Wilmink function showed lower values for criteria based on the -2log (L), AIC and BIC. The model with the Legendre polynomial of order 6 showed lower residual variance. Heritability estimates were similar between functions, ranging from 0.07 to 0.18 and were higher from 215 days of lactation. From 155 days of lactation, genetic and permanent environmental correlations between successive controls are of high magnitude. The Wilmink function is the most suitable for the study of milk yields from primiparous Holstein cows. The selection of animals is possible from 155 days of lactation on. Permanent environmental effects have greater influence on the milk production... Mostrar Tudo |
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Palavras-Chave: |
Models comparison; Permanent environmental effects; Random regression model. |
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Thesaurus Nal: |
Dairy cattle; Heritability. |
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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/190401/1/Artigo-JAgrSci-Claudio-Adjustment.pdf
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Marc: |
LEADER 02438naa a2200265 a 4500
001 2103873
005 2023-01-24
008 2018 bl uuuu u00u1 u #d
024 7 $a10.5539/jas.v10n2p1$2DOI
100 1 $aAZEVEDO JUNIOR, J.
245 $aAdjustment of lactation curves of Holstein cows from herds of Minas Gerais, Brazil.$h[electronic resource]
260 $c2018
300 $a14 p.
520 $aAbstract Random regression models (RRM) differ in terms of the functions used to describe the shape of lactation curves. The aim was to compare random regression models under different functions to describe the lactation curves from Holstein cows in herds of the state of Minas Gerais. A database of 28,118 production records was analyzed using the test-day records of 4,230 first parity cows from five herds. The Wilmink, Ali & Schaeffer and Legendre polynomial (orders 4, 5 and 6) functions were adjusted in RRM to model the mean production trend (fixed) and genetic and permanent environmental (random) effects. The residual variances were assumed to be constant throughout lactation. Analyses were performed using the AIREMLF90 program. Except for the model with the polynomial function of order 5, all models converged. The Wilmink function showed lower values for criteria based on the -2log (L), AIC and BIC. The model with the Legendre polynomial of order 6 showed lower residual variance. Heritability estimates were similar between functions, ranging from 0.07 to 0.18 and were higher from 215 days of lactation. From 155 days of lactation, genetic and permanent environmental correlations between successive controls are of high magnitude. The Wilmink function is the most suitable for the study of milk yields from primiparous Holstein cows. The selection of animals is possible from 155 days of lactation on. Permanent environmental effects have greater influence on the milk production at the end of lactation of primiparous cows and should be considered since they are important and may be cumulative throughout lactation.
650 $aDairy cattle
650 $aHeritability
653 $aModels comparison
653 $aPermanent environmental effects
653 $aRandom regression model
700 1 $aGONÇALVES, T. de M.
700 1 $aSOUZA, J. C. de
700 1 $aRODRIGUEZ, M. A. P.
700 1 $aCOSTA, C. N.
700 1 $aCARVALHEIRA, J. G. V.
773 $tJournal of Agricultural Science$gv. 10, n. 2, 2018.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Registro Completo
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
29/07/2015 |
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Data da última atualização: |
17/03/2016 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
SEREJO, J. A. dos S.; AUD, F. F. |
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Afiliação: |
JANAY ALMEIDA DOS SANTOS SEREJO, CNPMF; FABIANA FERRAZ AUD, CNPMF. |
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Título: |
Determinação do nível de ploidia em acessos do banco de germoplasma de Musa spp. por citometria de fluxo. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 3., 2014, Santos. Anais... Brasília, DF: Sociedade Brasileira de Recursos Genéticos, 2014. |
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Idioma: |
Português |
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Conteúdo: |
banco de germoplasma de bananeira da Embrapa Mandioca e Fruticultura (BAG-Banana) possui 364 acessos, incluindo espécies selvagens e cultivares de diferentes ploidias (2x, 3x e 4x) e grupos genômicos (AA, BB, AB, AAA, AAB, ABB, AAT, AAAA, AAAB, AABB). O BAG-banana é um dos maiores bancos de germoplasma da cultura conservados em campo, sendo considerado bem representativo da variabilidade genética do gênero. Objetivou-se confirmar o nível de ploidia dos acessos mediante a citometria de fluxo. Suspensões nucleares em tampão LB01 foram obtidas de amostras de folhas de 98 acessos de bananeira e do padrão interno Citrus sinensis (2C = 0,745 pg), sendo três repetições por acesso. O citômetro de fluxo Attune® Acoustic Focusing (Life Technologies) foi utilizado para medir a fluorescência de núcleos corados com iodeto de propídeo, contabilizando no mínimo 10 mil eventos. Dos 98 acessos analisados, 61 eram diploides, 32 triploides e 5 tetraploides. Pela citometria foi verificado que o acesso BGB048 Tambi que era classificado como triploide AAA é um diploide, e que o acesso BGB082 Lateína BT-100 não é diploide e sim tetraploide. Um acesso que não tinha sua ploidia determinada, BGB148 OF312, é triploide. |
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Thesagro: |
Banana. |
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Thesaurus NAL: |
Musa. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/128109/1/DETERMINACAO-DO-NIVEL.pdf
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Marc: |
LEADER 01787nam a2200145 a 4500
001 2020845
005 2016-03-17
008 2014 bl uuuu u00u1 u #d
100 1 $aSEREJO, J. A. dos S.
245 $aDeterminação do nível de ploidia em acessos do banco de germoplasma de Musa spp. por citometria de fluxo.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE RECURSOS GENÉTICOS, 3., 2014, Santos. Anais... Brasília, DF: Sociedade Brasileira de Recursos Genéticos$c2014
520 $abanco de germoplasma de bananeira da Embrapa Mandioca e Fruticultura (BAG-Banana) possui 364 acessos, incluindo espécies selvagens e cultivares de diferentes ploidias (2x, 3x e 4x) e grupos genômicos (AA, BB, AB, AAA, AAB, ABB, AAT, AAAA, AAAB, AABB). O BAG-banana é um dos maiores bancos de germoplasma da cultura conservados em campo, sendo considerado bem representativo da variabilidade genética do gênero. Objetivou-se confirmar o nível de ploidia dos acessos mediante a citometria de fluxo. Suspensões nucleares em tampão LB01 foram obtidas de amostras de folhas de 98 acessos de bananeira e do padrão interno Citrus sinensis (2C = 0,745 pg), sendo três repetições por acesso. O citômetro de fluxo Attune® Acoustic Focusing (Life Technologies) foi utilizado para medir a fluorescência de núcleos corados com iodeto de propídeo, contabilizando no mínimo 10 mil eventos. Dos 98 acessos analisados, 61 eram diploides, 32 triploides e 5 tetraploides. Pela citometria foi verificado que o acesso BGB048 Tambi que era classificado como triploide AAA é um diploide, e que o acesso BGB082 Lateína BT-100 não é diploide e sim tetraploide. Um acesso que não tinha sua ploidia determinada, BGB148 OF312, é triploide.
650 $aMusa
650 $aBanana
700 1 $aAUD, F. F.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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