Validation of consistency of Mendelian sampling variance in national evaluation models

Authors

  • Anna-Maria Tyriseva MTT Agrifood Research Animal Genetics Researcher
  • E A Mäntysaari
  • J Jakobsen
  • G P Aamand
  • J Dürr
  • W F Fikse
  • M H Lindauer

Keywords:

MACE, Variance components, heterogeneous variance, validation

Abstract

Trends in genetic variance benefit bulls coming from populations or year classes with increased genetic variance and lead to sub-optimal selection decisions. Therefore, national evaluation centers and Interbull need a method to observe possible trends in genetic variance.
Two different methods to estimate within-year genetic variance have been published (Fikse et al., 2003; Lidauer et al., 2007). Fikse et al. continued their work by presenting a procedure to obtain tolerance intervals for the within-year genetic variances (Fikse et al., 2005). It was tested using field data sets, but has not been implemented yet. The aim of this research project was to further dissect the behavior of both methods by performing a simulation study (Tyrisevä et al., 2011) and to develop a test to validate the consistency of Mendelian sampling variance in national evaluation models, which is outlined in this paper.

Author Biography

Anna-Maria Tyriseva, MTT Agrifood Research Animal Genetics Researcher

Biotechology and Food Research

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Published

2012-05-30

Issue

No. 46 (2012): Proceedings of the 2012 Interbull meeting

Section

Articles

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