Dwarfism (Angus mutation, DW1)

There are several forms (mutations) that result in conditions labeled as dwarfism.  Short-headed (snorter), long-headed, intermediate and compressed are all terms used to describe the various forms of dwarfism.  In 2002 and 2003 the American Angus Association identified calves determined to be dwarfs. Iowa State University (ISU) provided the research to identify a molecular marker (a SNP) that could indicate carriers of this form of the dwarfism gene.  In addition to the form of long head dwarfism, molecular markers are available for genotyping both Japanese Brown and Dexter cattle  (Bull dog) for certain strains of dwarfism. Because the ASA has an open herdbook, allowing other breeds into our database and percentage pedigrees, Dwarfism could be a risk in certain cattle.  We strongly suggest using ASA’s website Animal Search function to access the most up-to-date genetic abnormality-status for each animal in our database. Reporting Abnormal Calves: Call ASA immediately. ASA will reimburse all expenses. Take photos or video that best display the abnormality. We will need DNA (hair or tissue) from the calf, dam and sire. (We have DNA on all A.I. sires and donor dams.) If the calf is dead, chill the carcass until ASA has been contacted. Useful Links www.redangus.org