Monitoring Genetic Defects
DNA marker tests provide new tools to more efficiently identify and monitor genetic defects. The American Simmental Association`s Genetic Abnormality Policy is a scientifically based approach to managing and ultimately reducing the incidence of genetic abnormalities in our herds. It leverages cutting-edge technology both from DNA testing and software development standpoint to identify and present information on the potential for an animal to carry genetic abnormalities.
Sires and donor dams that fall into ASA’s carrier in lineage (CL) or risk population categories (PR) must be tested before registration certificates and EPDs are available on new progeny. If DNA is not available on a sire or donor dam in question, their progeny must be tested before registration certificates and EPDs are released. No testing is required on dams of natural calves.
The results of the test do not impact eligibility for registration of the an animal or its calves. The test requirement goes into effect when a DNA marker test becomes commericially available and the defect has been named by the Board of Trustees as a defect to be monitored.
Solutions Available to Meet Testing Requirements:
1. Provide test result documentation from a lab, breed association or ASA approved source.
2. If sire and/or donor dam has not been tested, complete required genetic testing.
3. If sire and/or donor dam is not available for testing, complete required genetic testing on offspring.
ASA`s TraitTrac System: genetic defect monitoring made easy
ASA`s coding system shows every animal`s current genetic defect status. As information new information is added to ASA`s records the TraitTrac system autuomatically update the genetic status of an animal and its descendants.
The genetic defect status for any animal can be viewed from the epd/pedigree display from Animal Search under Data Search. In addition, herd summaries with genetic defect status are available from Reports under Herd Mgmt. Keep in mind the only animals guaranteed to be free of an abnormality are those Tested Free (TF) category. For example, since animals coded as Assumed Free (AF) have not been tested there may by some risk they are carriers of a genetic defect. Also keep in mind that for untested animals the coding system relies on the accuracy of pedigree records.