| Registro completo |
| Provedor de dados: |
Animal Sciences
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| País: |
Brazil
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| Título: |
Genetic components of birth weight of texel sheep reared in extensive system
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| Autores: |
Amarilho-Silveira, Fernando
Dionello, Nelson José Laurino
Mendonça, Gilson de
Motta, Jaqueline Freitas
Fernandes, Tiago Albandes
Silva, Nicholas da Silveira
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| Data: |
2017-12-27
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| Ano: |
2017
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| Palavras-chave: |
Zootecnia Genética e Melhoramento dos Animais Domésticos maternal permanent environment
Heritability
Sheep breeding
Direct additive variance.
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| Resumo: |
This study aimed to estimate the components of (co)variance, genetic and phenotypic parameters and trends for birth weight. We used 783 birth weight records, between 2012 to 2016, of Texel sheep reared in extensive system. The components of (co)variance and the genetic parameters were estimated using six different animal models, using the restricted maximum likelihood method (REML). The model that best fit the data was Model 3, with estimates of direct additive genetic variance of 0.004, maternal permanent environment variance of 0.164, heritability coefficient of 0.011 and phenotypic variation attributed to the maternal permanent environment of 0.394. For the genetic trend, we observed a genetic gain of 0.413% and for the phenotypic trend, a phenotypic gain of 0.159 kg, between 2012 and 2016 were found. Estimates of direct heritability and proportion of the phenotypic variance explained by the maternal permanent environment presented lower and higher values, respectively, in comparison to other studies. For trends, both genetic and phenotypic, there were gains in birth weight between 2012 and 2016.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/36481
10.4025/actascianimsci.v40i0.36481
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| Editor: |
Editora da Universidade Estadual de Maringá
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| Relação: |
http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/36481/pdf
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| Formato: |
application/pdf
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| Fonte: |
Acta Scientiarum. Animal Sciences; v. 40 (2018): Publicação Contínua; e36481
Acta Scientiarum. Animal Sciences; v. 40 (2018): Publicação Contínua; e36481
1807-8672
1806-2636
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| Direitos: |
Direitos autorais 2017 Acta Scientiarum. Animal Sciences
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