Genomic information is now commonly used in routine genetic evaluations.  This is  usually in the form of genomic breeding values (GBVs) which have a high heritability but are generally confined to those animals with genotypes.   This can lead to anomalies when parents have GBVs and progeny do not.  By using a single-trait genetic evaluation, GBVs can be generated for related individuals.  It is most efficient to do this for genotyped individuals and their ancestors initially, and calculate mid-parent values for all other individuals.  A method for approximating accuracies for the relatives’ GBVs is described.

Bruce Tier

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Genetic Improvement Programs: Selection using molecular information (Posters), , 464, 2014
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