Normal linear models with genetically structured residual variance heterogeneity: a case study.

  title={Normal linear models with genetically structured residual variance heterogeneity: a case study.},
  author={D Sorensen and Rasmus Waagepetersen},
  journal={Genetical research},
  volume={82 3},
Normal mixed models with different levels of heterogeneity in the residual variance are fitted to pig litter size data. Exploratory analysis and model assessment is based on examination of various posterior predictive distributions. Comparisons based on Bayes factors and related criteria favour models with a genetically structured residual variance heterogeneity. There is, moreover, strong evidence of a negative correlation between the additive genetic values affecting litter size and those… CONTINUE READING
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