Genomic selection is revolutionizing animal breeding, since selection is based on the joint genetic merit of all SNP alleles across the genome. Lack of accurate and frequent data, however, forms the most important barrier to realize the full potential of genomic selection. There is on the other hand an enormous unexploited potential to utilize measurements taken by voluntary milking systems in breeding decisions. The overall aim is to investigate how data collected by voluntary milking systems can be used for genome-wide prediction of breeding values for udder conformation, using teat coordinates registered by voluntary milk systems and genotype data for cows. Results will be applicable to other on-farm automatic recording devices, for example used for heat detection and measuring
methane emissions, and as such contribute to genetic improvement in animal welfare and health, greenhouse gas emissions and production, amongst others.