Title of the paper: <b>Association between prion – protein - haplotypes and yield traits of station and field tested sheep</b> On the basis of routinely collected data and genotypes of the prion Protein from stud book and performance testing of sheep in Thuringia, associations between prion – protein - haplotypes and traits of fattening, carcasses, fleece and fertility were estimated. The number of useable Animals was for different attributes (altogether, genotyped) fattening 7316/793, ultrasound 4733/793, carcass 3787/165, wool score 2198/795 and litter size 26000/1643. For survival- analysis were 20803 died animals, thereof 284 genotyped and 7257 living animals, thereof 1452 genotyped useable. <br><br> Most of these traits showed no association with haplotypes of the prion protein. For the breed “Merinolandschaf” there was a tendency towards finer wool for homozygous ARR-carriers. In general, beyond the effect of the reduced selection pressure, no disadvantage is expected for Thuringian breeds when ARR – Haplotypes proliferate. Survival analyses show that known ARR-carriers stay longer in the flock.