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| Ferreira,Priscila Becker; Rorato,Paulo Roberto Nogara; Breda,Fernanda Cristina; Michelotti,Vanessa Tomazetti; Rosa,Alexandre Pires; Macedo,André. |
| ABSTRACT: This study aimed to test different genotypic and residual covariance matrix structures in random regression models to model the egg production of Barred Plymouth Rock and White Plymouth Rock hens aged between 5 and 12 months. In addition, we estimated broad-sense heritability, and environmental and genotypic correlations. Six random regression models were evaluated, and for each model, 12 genotypic and residual matrix structures were tested. The random regression model with linear intercept and unstructured covariance (UN) for a matrix of random effects and unstructured correlation (UNR) for residual matrix adequately model the egg production curve of hens of the two study breeds. Genotypic correlations ranged from 0.15 (between age of 5 and 12... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Barred Plymouth Rock; Heritability; Laying rate; White Plymouth Rock. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500652 |
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