Irregular transmissions in the acidic prealbumin (Pr) system of the horse

Abstract

During the routine parentage control of Norwegian Trotter horses with 10,000 parent-offspring combinations, 2 irregular transmissions of Pr [acid prealbumin] alleles were found. The allele products were provisionally named D1 and D2. They appeared in 2 stallions which were typed as D1I and D2N, respectively. The 1st stallion transmitted PrD1 to 7 out of 10 offspring and the 2nd stallion PrD2 to 2 of 4 offspring. Photographs of 7 new Pr phenotypes are presented.