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| Prestes,Alan Miranda; Oliveira,Mauricio Morgado de; Mello,Fernanda Cristina Breda; Rorato,Paulo Roberto Nogara; Lopes,Jader Silva; Feltes,Giovani Luis; Bravo,André Padilha. |
| Abstract: The objective of this work was to identify the most suitable model for the genetic evaluation of post-weaning weight gain in a multibreed Angus-Nelore population. Three models were tested using the Bayesian inference method: traditional animal model (M1), multibreed animal model without (M2) and with segregation (M3). The choice of the best model followed the criteria: number of parameters (Np), deviance information criterion (DIC), conditional predictive ordinate (CPO), and deviance based on Bayes factors. Spearman’s rank correlations were estimated for the top 10, 20, and 30% sires. M1 presented the highest values for all criteria, except for Np, and the lowest direct heritability estimate of 0.15±0.01. The heritability estimates for M2 and M3... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal breeding; Crossbreeding; Dominance; Epistatic losses; Genetic parameters. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102803 |
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| Feltes,Giovani Luis; Michelotti,Vanessa Tomazetti; Prestes,Alan Miranda; Bravo,André Padilha; Bondan,Carlos; Dornelles,Mariana de Almeida; Breda,Fernanda Cristina; Rorato,Paulo Roberto Nogara. |
| ABSTRACT: The objective of this study was to identify a nonlinear regression model that better describes the milk production and the percentages of fat and protein curves, and to identify the season and age of calving that result in higher productions. For the analysis, 8,047 records of milk production and percentages of fat and protein obtained from 1,330 Holstein breed cows raised in Rio Grande do Sul, born from 1989 to 2011, were used. After determining the most appropriate nonlinear regression model, the identity of models and the equality of parameter tests for the different classes of season and age of calving were performed. Residual mean square, mean absolute deviation, mean squared prediction error and percentage of estimated curves per animal,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Calving season; Hyperbolic linear function; Age at calving; Identity model test. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000400700 |
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