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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
09/04/2013 |
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Data da última atualização: |
09/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SANTOS, D. J. A.; PEIXOTO, M. G. C. D.; BORQUIS, R. R. A.; VERNEQUE, R. da S.; PANETTO, J. C. do C.; TONHATI, H. |
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Afiliação: |
D. J. A. SANTOS, UNESP; MARIA GABRIELA CAMPOLINA D PEIXOTO, CNPGL; R. R. A. BORQUIS, UNESP; RUI DA SILVA VERNEQUE, CNPGL; JOAO CLAUDIO DO CARMO PANETTO, CNPGL; H. TONHATI, UNESP. |
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Título: |
Genetic parameters for test-day milk yield, 305-day milk yield, and lactation length in guzerat cows. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Livestock Science, v. 152, n. 2/3, p. 114-119, 2013. |
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DOI: |
https://doi.org/10.1016/j.livsci.2012.12.012 |
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Idioma: |
Inglês |
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Conteúdo: |
Milk production in tropical environments requires the use of crossbreeding systems including breeds well adapted to harsh conditions, but with lower productivities when compared to specialized breeds. Besides the genetic improvement for milk production, lactation lengths also need to be studied for most of these breeds. Accordingly, genetic parameters were estimated for 305-day cumulative milk yield (MY305), test-day milk yield (TDMY), and lactation length (LL) using information from the first lactations of 2816 Guzerat cows selected for milk production in 28 herds in Brazil. Contemporary groups were defined as herd, year and season of the test for TDMY, and as herd, year and season of calving for MY305 and LL. Variance components were estimated with the restricted maximum likelihood method under a multi-trait animal model. Heritabilities estimated for TDMY ranged from 0.16 to 0.24, and were 0.24 and 0.12 for MY305 and LL, respectively. Genetic correlations were high and positive, ranging from 0.51 to 0.99 among TDMY records, from 0.81 to 0.98 between each TDMY and MY305, and from 0.71 to 0.94 between each TDMY and LL. Genetic parameters obtained in this study indicated the possibility of using test-day records for the prediction of breeding values for milk yield in this population of the Guzerat breed. The use of TDMY as selection criteria would result in indirect gains in MY305 and LL. However, the highest response to selection for MY305 would be obtained by direct selection for this trait. MenosMilk production in tropical environments requires the use of crossbreeding systems including breeds well adapted to harsh conditions, but with lower productivities when compared to specialized breeds. Besides the genetic improvement for milk production, lactation lengths also need to be studied for most of these breeds. Accordingly, genetic parameters were estimated for 305-day cumulative milk yield (MY305), test-day milk yield (TDMY), and lactation length (LL) using information from the first lactations of 2816 Guzerat cows selected for milk production in 28 herds in Brazil. Contemporary groups were defined as herd, year and season of the test for TDMY, and as herd, year and season of calving for MY305 and LL. Variance components were estimated with the restricted maximum likelihood method under a multi-trait animal model. Heritabilities estimated for TDMY ranged from 0.16 to 0.24, and were 0.24 and 0.12 for MY305 and LL, respectively. Genetic correlations were high and positive, ranging from 0.51 to 0.99 among TDMY records, from 0.81 to 0.98 between each TDMY and MY305, and from 0.71 to 0.94 between each TDMY and LL. Genetic parameters obtained in this study indicated the possibility of using test-day records for the prediction of breeding values for milk yield in this population of the Guzerat breed. The use of TDMY as selection criteria would result in indirect gains in MY305 and LL. However, the highest response to selection for MY305 would be obtained by direct selecti... Mostrar Tudo |
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Palavras-Chave: |
Componentes de variancia; Ganho genetico; Produção de leite. |
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Thesaurus Nal: |
zebu. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 02286naa a2200241 a 4500
001 1955370
005 2024-02-09
008 2013 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.livsci.2012.12.012$2DOI
100 1 $aSANTOS, D. J. A.
245 $aGenetic parameters for test-day milk yield, 305-day milk yield, and lactation length in guzerat cows.$h[electronic resource]
260 $c2013
520 $aMilk production in tropical environments requires the use of crossbreeding systems including breeds well adapted to harsh conditions, but with lower productivities when compared to specialized breeds. Besides the genetic improvement for milk production, lactation lengths also need to be studied for most of these breeds. Accordingly, genetic parameters were estimated for 305-day cumulative milk yield (MY305), test-day milk yield (TDMY), and lactation length (LL) using information from the first lactations of 2816 Guzerat cows selected for milk production in 28 herds in Brazil. Contemporary groups were defined as herd, year and season of the test for TDMY, and as herd, year and season of calving for MY305 and LL. Variance components were estimated with the restricted maximum likelihood method under a multi-trait animal model. Heritabilities estimated for TDMY ranged from 0.16 to 0.24, and were 0.24 and 0.12 for MY305 and LL, respectively. Genetic correlations were high and positive, ranging from 0.51 to 0.99 among TDMY records, from 0.81 to 0.98 between each TDMY and MY305, and from 0.71 to 0.94 between each TDMY and LL. Genetic parameters obtained in this study indicated the possibility of using test-day records for the prediction of breeding values for milk yield in this population of the Guzerat breed. The use of TDMY as selection criteria would result in indirect gains in MY305 and LL. However, the highest response to selection for MY305 would be obtained by direct selection for this trait.
650 $azebu
653 $aComponentes de variancia
653 $aGanho genetico
653 $aProdução de leite
700 1 $aPEIXOTO, M. G. C. D.
700 1 $aBORQUIS, R. R. A.
700 1 $aVERNEQUE, R. da S.
700 1 $aPANETTO, J. C. do C.
700 1 $aTONHATI, H.
773 $tLivestock Science$gv. 152, n. 2/3, p. 114-119, 2013.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
26/05/2017 |
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Data da última atualização: |
26/05/2017 |
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Autoria: |
RIZZARDI, M. A.; BALBINOT JUNIOR, A. A.; BIANCHI, M. A.; KARAM, D. |
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Afiliação: |
DECIO KARAM, CNPMS. |
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Título: |
Manejo de plantas daninhas na cultura do milho. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: MONQUERO, P. A. (Org.). Manejo de plantas daninhas nas culturas agrícolas. São Carlos: RiMa, 2014. |
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Páginas: |
p. 41-53. |
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Idioma: |
Português |
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Thesagro: |
Erva daninha. |
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Thesaurus NAL: |
Weeds. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00556naa a2200181 a 4500
001 2070108
005 2017-05-26
008 2014 bl uuuu u00u1 u #d
100 1 $aRIZZARDI, M. A.
245 $aManejo de plantas daninhas na cultura do milho.$h[electronic resource]
260 $c2014
300 $ap. 41-53.
650 $aWeeds
650 $aErva daninha
700 1 $aBALBINOT JUNIOR, A. A.
700 1 $aBIANCHI, M. A.
700 1 $aKARAM, D.
773 $tIn: MONQUERO, P. A. (Org.). Manejo de plantas daninhas nas culturas agrícolas. São Carlos: RiMa, 2014.
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