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A study of heterogeneity of environmental variance for slaughter weight in pigs

Published online by Cambridge University Press:  01 January 2008

N. Ibáñez-Escriche ,
L. Varona ,
D. Sorensen  and
J. L. Noguera
N. Ibáñez-Escriche*
Affiliation:
Genètica i Millora Animal - IRTA, 25198 Lleida, Spain Departamento de Ciencia Animal, UPV, PO Box 22012, 46071 Valencia, Spain
L. Varona
Affiliation:
Genètica i Millora Animal - IRTA, 25198 Lleida, Spain
D. Sorensen
Affiliation:
Danish Institute of Agricultural Sciences, PB50, 8830 Tjele, Denmark
J. L. Noguera
Affiliation:
Genètica i Millora Animal - IRTA, 25198 Lleida, Spain
*
Genètica i Millora Animal - IRTA, 25198 Lleida, Spain. E-mail: noelia.ibañez@irta.es
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Abstract

This work presents an analysis of heterogeneity of environmental variance for slaughter weight (175 days) in pigs. This heterogeneity is associated with systematic and additive genetic effects. The model also postulates the presence of additive genetic effects affecting the mean and environmental variance. The study reveals the presence of genetic variation at the level of the mean and the variance, but an absence of correlation, or a small negative correlation, between both types of additive genetic effects. In addition, we show that both, the additive genetic effects on the mean and those on environmental variance have an important influence upon the future economic performance of selected individuals.

Keywords

Bayesian analysisheterogeneous environmental variancepigsslaughter weight
Type
Full Paper
Information
animal , Volume 2 , Issue 1 , January 2008 , pp. 19 - 26
Copyright
Copyright © The Animal Consortium 2008

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