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1 results

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

  • N. Ibáñez-Escriche, L. Varona, D. Sorensen, J. L. Noguera
  • Journal:
    animal / Volume 2 / Issue 1 / January 2008
    Published online by Cambridge University Press:
    01 January 2008, pp. 19-26
    Print publication:
    January 2008

  • 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.