| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Clima Temperado. |
|
Data corrente: |
03/10/2012 |
|
Data da última atualização: |
08/09/2015 |
|
Tipo da produção científica: |
Circular Técnica |
|
Autoria: |
MATTOS, M. L. T.; SCIVITTARO, W. B.; PETRINI, J. A.; SANTOS, I. M. B. dos. |
|
Afiliação: |
MARIA LAURA TURINO MATTOS, CPACT; WALKYRIA BUENO SCIVITTARO, CPACT; JOSE ALBERTO PETRINI, CPACT; IEDA MARIA BAADE DOS SANTOS, CPAMN. |
|
Título: |
Qualidade da água de drenagem em Cultivo de Arroz Pré-germinado: sistema de cultivo de arroz pré?germinado e mananciais hídricos. |
|
Ano de publicação: |
2012 |
|
Fonte/Imprenta: |
Pelotas: Embrapa Clima Temperado, 2012. |
|
Páginas: |
6 p. |
|
Série: |
(Embrapa Clima Temperado. Circular Técnica, 125). |
|
Idioma: |
Português |
|
Palavras-Chave: |
Arroz pré–germinado. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/67334/1/CIRCULAR-TECNICA-125-2.pdf
|
|
Marc: |
LEADER 00589nam a2200169 a 4500
001 1935421
005 2015-09-08
008 2012 bl uuuu u0uu1 u #d
100 1 $aMATTOS, M. L. T.
245 $aQualidade da água de drenagem em Cultivo de Arroz Pré-germinado$bsistema de cultivo de arroz pré?germinado e mananciais hídricos.
260 $aPelotas: Embrapa Clima Temperado$c2012
300 $a6 p.
490 $a(Embrapa Clima Temperado. Circular Técnica, 125).
653 $aArroz pré–germinado
700 1 $aSCIVITTARO, W. B.
700 1 $aPETRINI, J. A.
700 1 $aSANTOS, I. M. B. dos
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Clima Temperado (CPACT) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Gado de Leite. |
|
Data corrente: |
12/12/2012 |
|
Data da última atualização: |
09/02/2024 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 2 |
|
Autoria: |
PEREIRA, R. J.; VERNEQUE, R. da S.; LOPES, P. S.; SANTANA JUNIOR, M. L.; LAGROTTA, M. R.; TORRES, R. A.; VERCESI FILHO, A. E.; MACHADO, M. A. |
|
Afiliação: |
R. J. PEREIRA, UNESP; RUI DA SILVA VERNEQUE, CNPGL; P. S. LOPES, UFV; M. L. SANTANA JUNIOR, UFMT; M. R. LAGROTTA, UFV; R. A. TORRES, UFV; A. E. VERCESI FILHO, APTA; MARCO ANTONIO MACHADO, CNPGL. |
|
Título: |
Milk yield persistency in brazilian gyr cattle based on a random regression model. |
|
Ano de publicação: |
2012 |
|
Fonte/Imprenta: |
Genetics and Molecular Research, v. 11, n. 2., p. 1599-1609, 2012. |
|
DOI: |
https://doi.org/10.4238/2012.june.15.9 |
|
Idioma: |
Inglês |
|
Conteúdo: |
With the objective of evaluating measures of milk yield persistency, 27,000 test-day milk yield records from 3362 first lactations of Brazilian Gyr cows that calved between 1990 and 2007 were analyzed with a random regression model. Random, additive genetic and permanent environmental effects were modeled using Legendre polynomials of order 4 and 5, respectively. Residual variance was modeled using five classes. The average lactation curve was modeled using a fourth-order Legendre polynomial. Heritability estimates for measures of persistency ranged from 0.10 to 0.25. Genetic correlations between measures of persistency and 305-day milk yield (Y305) ranged from -0.52 to 0.03. At high selection intensities for persistency measures and Y305, few animals were selected in common. As the selection intensity for the two traits decreased, a higher percentage of animals were selected in common. The average predicted breeding values for Y305 according to year of birth of the cows had a substantial annual genetic gain. In contrast, no improvement in the average persistency breeding value was observed. We conclude that selection for total milk yield during lactation does not identify bulls or cows that are genetically superior in terms of milk yield persistency. A measure of persistency represented by the sum of deviations of estimated breeding value for days 31 to 280 in relation to estimated breeding value for day 30 should be preferred in genetic evaluations of this trait in the Gyr breed, since this measure showed a medium heritability and a genetic correlation with 305-day milk yield close to zero. In addition, this measure is more adequate at the time of peak lactation, which occurs between days 25 and 30 after calving in this breed. MenosWith the objective of evaluating measures of milk yield persistency, 27,000 test-day milk yield records from 3362 first lactations of Brazilian Gyr cows that calved between 1990 and 2007 were analyzed with a random regression model. Random, additive genetic and permanent environmental effects were modeled using Legendre polynomials of order 4 and 5, respectively. Residual variance was modeled using five classes. The average lactation curve was modeled using a fourth-order Legendre polynomial. Heritability estimates for measures of persistency ranged from 0.10 to 0.25. Genetic correlations between measures of persistency and 305-day milk yield (Y305) ranged from -0.52 to 0.03. At high selection intensities for persistency measures and Y305, few animals were selected in common. As the selection intensity for the two traits decreased, a higher percentage of animals were selected in common. The average predicted breeding values for Y305 according to year of birth of the cows had a substantial annual genetic gain. In contrast, no improvement in the average persistency breeding value was observed. We conclude that selection for total milk yield during lactation does not identify bulls or cows that are genetically superior in terms of milk yield persistency. A measure of persistency represented by the sum of deviations of estimated breeding value for days 31 to 280 in relation to estimated breeding value for day 30 should be preferred in genetic evaluations of this trait in the Gyr... Mostrar Tudo |
|
Palavras-Chave: |
Função de covariância; Parametros genéticos; Produção de leite. |
|
Thesagro: |
Gado Leiteiro. |
|
Categoria do assunto: |
G Melhoramento Genético |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/942286/1/Milk-yield-persistency-in-brazilian-gyr-cattle-based-on-a-random-regression-model.pdf
|
|
Marc: |
LEADER 02591naa a2200265 a 4500
001 1942286
005 2024-02-09
008 2012 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.4238/2012.june.15.9$2DOI
100 1 $aPEREIRA, R. J.
245 $aMilk yield persistency in brazilian gyr cattle based on a random regression model.$h[electronic resource]
260 $c2012
520 $aWith the objective of evaluating measures of milk yield persistency, 27,000 test-day milk yield records from 3362 first lactations of Brazilian Gyr cows that calved between 1990 and 2007 were analyzed with a random regression model. Random, additive genetic and permanent environmental effects were modeled using Legendre polynomials of order 4 and 5, respectively. Residual variance was modeled using five classes. The average lactation curve was modeled using a fourth-order Legendre polynomial. Heritability estimates for measures of persistency ranged from 0.10 to 0.25. Genetic correlations between measures of persistency and 305-day milk yield (Y305) ranged from -0.52 to 0.03. At high selection intensities for persistency measures and Y305, few animals were selected in common. As the selection intensity for the two traits decreased, a higher percentage of animals were selected in common. The average predicted breeding values for Y305 according to year of birth of the cows had a substantial annual genetic gain. In contrast, no improvement in the average persistency breeding value was observed. We conclude that selection for total milk yield during lactation does not identify bulls or cows that are genetically superior in terms of milk yield persistency. A measure of persistency represented by the sum of deviations of estimated breeding value for days 31 to 280 in relation to estimated breeding value for day 30 should be preferred in genetic evaluations of this trait in the Gyr breed, since this measure showed a medium heritability and a genetic correlation with 305-day milk yield close to zero. In addition, this measure is more adequate at the time of peak lactation, which occurs between days 25 and 30 after calving in this breed.
650 $aGado Leiteiro
653 $aFunção de covariância
653 $aParametros genéticos
653 $aProdução de leite
700 1 $aVERNEQUE, R. da S.
700 1 $aLOPES, P. S.
700 1 $aSANTANA JUNIOR, M. L.
700 1 $aLAGROTTA, M. R.
700 1 $aTORRES, R. A.
700 1 $aVERCESI FILHO, A. E.
700 1 $aMACHADO, M. A.
773 $tGenetics and Molecular Research$gv. 11, n. 2., p. 1599-1609, 2012.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Gado de Leite (CNPGL) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
