An animal’s breeding value is its genetic merit, half of which will be passed on to its progeny. While we will never know the exact breeding value, for performance traits it is possible to make good estimates. These are called Estimated Breeding Values (EBVs). The EBV is therefore the best estimate of an animal’s genetic merit for that trait. EBVs are expressed as the difference between an individual animal’s genetics and the genetic base to which the animal is compared.
An accuracy value is presented with every EBV and gives an indication of the amount of information that has been used in the calculation of that EBV. The higher the accuracy, the lower the likelihood of change in the animal’s EBV as more information is analysed for that animal or its relatives.
Accuracy Range Interpretation
o Less than 50% = Low accuracy and should be considered a preliminary estimate. The EBV could change substantially as more performance information becomes available.
o 50 – 74% = Medium accuracy, usually based on the animal’s own records and pedigree.
o 75 – 90% = Medium-high accuracy and usually includes some progeny information. Becoming a more reliable indicator of the animal’s value as a parent.
o 90% and above = High accuracy. It is unlikely that the EBV will change much with the addition of more progeny data.
Note – There is currently more than 5,000 Fullblood abattoir carcase records used in the Wagyu BREEDLAN carcase analysis with additional records added on a regular basis. The analysis also use Rib and Rump Fat and Eye Muscle Area ultrasound scanning records which are collected on live animals between 300 to 800 days of age. The genetic correlation between ultrasound Intramuscular Fat (IMF) percentage and carcase marble score were found to be very low and not useful. Therefore; IMF is not included in the analysis to determine Marble Score EBVs.
Ultrasound scanning must be done by an accredited technician, click here for a list of accredited technicians.
There is currently no direct abattoir carcase data used in the carcase EBV analysis. However, the AWA Collaborative Genetics Research Project is addressing the inclusion of real carcass data into Wagyu BREEDPLAN.
For benchmarking, the average Wagyu BREEDPLAN EBVs for the 2012 drop calves are tabled below.
For further information on BREEDPLAN click here.
The Wagyu GROUP BREEDPLAN Estimated Breeding Values contained in AWA Sale Catalogues were compiled by the Agricultural Business Research Institute (ABRI) from data supplied by the breeders. Neither the Australian Wagyu Association nor the ABRI oversee or audit the collection of this data.