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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
12/08/2021 |
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Data da última atualização: |
29/12/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SANTOS, E. P. B.; FELTES, G. L.; NEGRI, R.; COBUCI, J. A.; SILVA, M. V. G. B. |
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Afiliação: |
Pós-graduando, Universidade Estadual de Santa Cruz; Pós-graduando, Universidade Federal do Rio Grande do Sul; Universidade Federal do Rio Grande do Sul; Universidade Federal do Rio Grande do Sul; MARCOS VINICIUS GUALBERTO B SILVA, CNPGL. |
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Título: |
Estimation of genetic parameters for test-day milk yield in Girolando cows using a random regression model. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Arquivo Brasileiro de Medicina Veterinária e Zootecnia, v. 73, n. 1, p. 18-24, 2021. |
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DOI: |
http://dx.doi.org/10.1590/1678-4162-12071 |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to estimate the components of variance and genetic parameters of test-day milk yield in first lactation Girolando cows, using a random regression model. A total of 126,892 test-day milk yield (TDMY) records of 15,351 first-parity Holstein, Gyr, and Girolando breed cows were used, obtained from the Associação Brasileira dos Criadores de Girolando. To estimate the components of (co) variance, the additive genetic functions and permanent environmental covariance were estimated by random regression in three functions: Wilmink, Legendre Polynomials (third order) and Linear spline Polynomials (three knots). The Legendre polynomial function showed better fit quality. The genetic and permanent environment variances for TDMY ranged from 2.67 to 5.14 and from 9.31 to 12.04, respectively. Heritability estimates gradually increased from the beginning (0.13) to mid-lactation (0.19). The genetic correlations between the days of the control ranged from 0.37 to 1.00. The correlations of permanent environment followed the same trend as genetic correlations. The use of Legendre polynomials via random regression model can be considered as a good tool for estimating genetic parameters for test-day milk yield records. |
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Palavras-Chave: |
Correlação genética; Função de Wilmink; Herdabilidade; Polinômios de Legendre; Polinômios splines lineares. |
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Thesagro: |
Bovino; Gado Leiteiro; Parâmetro Genético; Variação Genética. |
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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/225105/1/Estimation-genetic.pdf
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Marc: |
LEADER 02193naa a2200289 a 4500
001 2133497
005 2021-12-29
008 2021 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1590/1678-4162-12071$2DOI
100 1 $aSANTOS, E. P. B.
245 $aEstimation of genetic parameters for test-day milk yield in Girolando cows using a random regression model.$h[electronic resource]
260 $c2021
520 $aThe objective of this study was to estimate the components of variance and genetic parameters of test-day milk yield in first lactation Girolando cows, using a random regression model. A total of 126,892 test-day milk yield (TDMY) records of 15,351 first-parity Holstein, Gyr, and Girolando breed cows were used, obtained from the Associação Brasileira dos Criadores de Girolando. To estimate the components of (co) variance, the additive genetic functions and permanent environmental covariance were estimated by random regression in three functions: Wilmink, Legendre Polynomials (third order) and Linear spline Polynomials (three knots). The Legendre polynomial function showed better fit quality. The genetic and permanent environment variances for TDMY ranged from 2.67 to 5.14 and from 9.31 to 12.04, respectively. Heritability estimates gradually increased from the beginning (0.13) to mid-lactation (0.19). The genetic correlations between the days of the control ranged from 0.37 to 1.00. The correlations of permanent environment followed the same trend as genetic correlations. The use of Legendre polynomials via random regression model can be considered as a good tool for estimating genetic parameters for test-day milk yield records.
650 $aBovino
650 $aGado Leiteiro
650 $aParâmetro Genético
650 $aVariação Genética
653 $aCorrelação genética
653 $aFunção de Wilmink
653 $aHerdabilidade
653 $aPolinômios de Legendre
653 $aPolinômios splines lineares
700 1 $aFELTES, G. L.
700 1 $aNEGRI, R.
700 1 $aCOBUCI, J. A.
700 1 $aSILVA, M. V. G. B.
773 $tArquivo Brasileiro de Medicina Veterinária e Zootecnia$gv. 73, n. 1, p. 18-24, 2021.
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Embrapa Gado de Leite (CNPGL) |
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