Evaluating a Test Mating
EBV calculations are based on data updated January 2024. The current database has a breed average of 10.4 for hip scores with a heretiability of 51% and 25% for hips and elbows respectively
The more dogs entered in the database the more accurate the EBV. Please add your dog’s Hip and Elbow information.
Pick the dogs you’re interested in and use the EBVs for those two dogs to predict the EBV of the puppies.
In this example the sire has better than average EBV for hips, the dam has worse than average. Their progeny will have the slightly better than average EBVs – so for the GENETIC component of hip quality, this mating would produce puppies with a slightly better genetic risk of hip dysplasia.
- The lower the EBV the better
- however, selecting any dog with an EBV lower than average will still lower the risk
- a dog with a hip score a bit over the breed average could be a reasonable choice as long as the EBV indicates low genetic risk with good confidence
- selecting against hip dysplasia should be balanced with other important factors such as temperament, and health test results.
It is important to maintain genetic diversity while selectively reducing the risk of hip dysplasia. Ensuring that every mating makes some contribution to reducing genetic risk is an effective way of doing this as it avoids an undue focus on particular sires with low EBVs.
You can use EBVs for ANY trait you have information for. It’s being used for hips, elbows, heart defects, cataracts, cancer etc, anything that has a genetic component. It provides you with an estimate of heritability – the higher the heritability, the easier it is to improve the trait through selective breeding. The current Golden Retriever database has an heritability of 60% for hips and 30% for elbows. A heritability of 60% would be a trait that will respond strongly to selection and a heritability of 30% a trait that will respond moderately.