TY - JOUR
T1 - Influence of genotype-environment interaction on the classification of Nellore bulls in Southern Brazil
AU - Bresolin, Tiago
AU - Everling, Dionéia Magda
AU - Rorato, Paulo Roberto Nogara
AU - Braz, Camila Urbano
AU - Breda, Fernanda Cristina
N1 - Publisher Copyright:
© 2015, Eduem - Editora da Universidade Estadual de Maringa. All rights reserved.
PY - 2015
Y1 - 2015
N2 - The aim of this study was to assess the occurrence of genotype-environment interaction, as well as its effects on the magnitude of genetic parameters and the classification of Nellore breeding bulls for the trait adjusted weight at 205 days (W205) on Southern Brazil. The components of (co)variance were estimated by Bayesian inference, using a linear-linear animal model in a bi-trait analysis. The proposed model for the analyses considers as random the direct additive genetic and maternal effects and residual effects, and as fixed effects the contemporary groups, sex, season of birth and weighing, and calving age as covariable (linear and quadratic effects). The a posteriori mean estimates of the direct heritabilities for W205 in the three States varied from 0.24 in Paraná (PR) to 0.34 in Santa Catarina (SC). The estimates of maternal heritability varied from 0.23 in SC and Rio Grande do Sul (RS) to 0.28 in PR. The a posteriori mean distributions of the genetic correlation varied from 0.52 between SC and RS, to 0.84 between PR and RS, suggesting that the best breeding bulls in SC are not the same as in RS.
AB - The aim of this study was to assess the occurrence of genotype-environment interaction, as well as its effects on the magnitude of genetic parameters and the classification of Nellore breeding bulls for the trait adjusted weight at 205 days (W205) on Southern Brazil. The components of (co)variance were estimated by Bayesian inference, using a linear-linear animal model in a bi-trait analysis. The proposed model for the analyses considers as random the direct additive genetic and maternal effects and residual effects, and as fixed effects the contemporary groups, sex, season of birth and weighing, and calving age as covariable (linear and quadratic effects). The a posteriori mean estimates of the direct heritabilities for W205 in the three States varied from 0.24 in Paraná (PR) to 0.34 in Santa Catarina (SC). The estimates of maternal heritability varied from 0.23 in SC and Rio Grande do Sul (RS) to 0.28 in PR. The a posteriori mean distributions of the genetic correlation varied from 0.52 between SC and RS, to 0.84 between PR and RS, suggesting that the best breeding bulls in SC are not the same as in RS.
KW - Bayesian inference
KW - Beef cattle
KW - Genetic correlation
KW - Genetic parameters
KW - Variance components
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U2 - 10.4025/actascianimsci.v37i2.23602
DO - 10.4025/actascianimsci.v37i2.23602
M3 - Article
AN - SCOPUS:84930396815
SN - 1806-2636
VL - 37
SP - 195
EP - 201
JO - Acta Scientiarum - Animal Sciences
JF - Acta Scientiarum - Animal Sciences
IS - 2
ER -