Estimated Breeding Values (EBVs) for tick resistance

As described in the Within breed selection’ section, EBVs are more accurate assessments of an animal’s ranking (relative to other animals in the cohort group) for tick resistance. However due to the difficulties of measuring tick resistance using either tick counts or tick scores (see the How and when to tick scoresection), EBVs are not currently included in routine genetic evaluations for either beef or dairy cattle in any country. Research is underway to develop simpler and more cost-effective measures of tick resistance. In the meantime though, if breeders wish to evaluate their cattle for tick resistance, it is suggested they should discuss the options and opportunities with their genetic service provider (e.g. BREEDPLAN in Australia) and/or their cattle breed society.