What is WCC?
AWA’s Wagyu Content Check (WCC) is used to determine the proportion of Japanese Black Wagyu genetics in cattle that do not have complete pedigree records. It provides a genomic estimate of Wagyu content, helping producers make more informed breeding, feeding, and marketing decisions.
How does WCC work?
The WCC uses genomic analysis based on an animal’s SNP profile to estimate the proportion (%) of Japanese Black Wagyu genetics in its genetic makeup. The test compares an animal’s genotype to a reference population of contemporary Wagyu, Angus, Brahman, Jersey and Holstein animals.
Why use the WCC?
- Verify Wagyu content genomically: The test analyzes the animal’s DNA and estimates the percentage of Wagyu genetics present, rather than relying solely on assumptions based on breeding generations.
- Register previously unrecorded cattle: Animals without traceable pedigrees can potentially be recorded in the AWA breeding Register when supported by WCC results, allowing valuable genetics to be recognized within the industry and access to other AWA services like WBVs.
- Improve production decisions : Producers can identify cattle with higher Wagyu content before feeding programs begin, helping optimize feeding strategies and improve the consistency of premium beef outcomes.
- Support marketing and value claims: Buyers, processors, and brand owners can use WCC results to substantiate claims regarding Wagyu percentage, supporting quality assurance and product differentiation.
- More accurate than generation-based estimates: Due to natural genetic variation, animals do not always inherit exact percentages of Wagyu genetics expected from their pedigree generation. WCC measures actual genomic content rather than expected content.
How is WCC ordered and results accessed?
WCC can be requested by AWA members through the usual process of ordering genomic test (DNA Request Forms and Process). Before WCC results can be provided, the animal must have a SNP profile available at the AWA, either from existing genomic test results or from a newly submitted DNA sample. Once genotyping is complete, the analysis runs weekly (in line with the WBV evaluation) whereby a Wagyu content percentage is calculated.
The result is then made available on the AWA Helical database and used to determine the animal’s grade classification where applicable as described below.
How does WCC apply to animal grades in the AWA breeding registers?
In the absence of pedigree data, the WCC Wagyu percentage value is used to determine an animal’s grade classification within the AWA database and breeding register. Animals with 0–50% Wagyu content are classified as Base Animals, with Wagyu content able to be progressively increased through successive generations when mated to Wagyu animals (see table below). As Wagyu content increases, animals may qualify for higher grade classifications, subject to AWA registration and pedigree requirements.
It is important to note that the Purebred classifications are not determined by WCC results alone:
- Purebred animals are required to be at least 93% Wagyu and be parent verified to a registered sire and dam. They will have non-Wagyu ancestry somewhere within their pedigree as part of the grading up procedure.
- By Contrast, fullblood animals can trace their pedigree entirely to the original Japanese foundation animals and contain no recorded grading up within their lineage.
The table below outlines the Wagyu grade classifications and associated requirements.
Table 1: Grade Code Assignment Based on Generation or Minimum % Wagyu Content
Why Pedigree Percentage and Genomic Wagyu Content Can Differ
When estimating Wagyu content, it is important to understand that genetics are not inherited in perfectly equal proportions from generation to generation.
Although pedigree calculations may suggest an animal should inherit a particular percentage of Wagyu genetics, the actual proportion inherited can vary because each animal receives a unique combination of its parents’ DNA. As a result, animals with the same pedigree percentage may not have exactly the same genomic Wagyu content. This is why a Wagyu Content Check can provide a more accurate assessment of Wagyu content than pedigree estimates alone, particularly where parentage is incomplete or unknown.
For this reason, the AWA recommends testing the oldest animals in a herd with a Wagyu Content Check where parentage cannot be established, and then registering subsequent generations based on parentage.
Are there any limitations of the WCC?
The WCC is an excellent tool for estimating Wagyu content in crossbred cattle, but it should not be used as a substitute for pedigree verification, particularly in the case of Purebred and Fullblood animals.
For example, the WCC compares animals to the AWA recorded reference population which is influenced more significantly by the last 5 years of breeding decisions. Animals with less common Fullblood ancestors may display lower WCC results. Therefore, the test is most valuable for crossbred and non-pedigreed cattle, while Fullblood status is confirmed through pedigree and DNA parent verification.
Additionally, the WCC uses reference populations of Angus, Brahman, Holstein, and Jersey cattle to estimate non-Wagyu breed composition. Where Wagyu-cross animals contain additional breeds outside these reference populations, estimates of the non-Wagyu portion may be less accurate. This limitation has minimal impact on the Wagyu content estimate, which is why the AWA reports only Wagyu content and does not publish non-Wagyu breed percentages.
How does the Wagyu Content Check estimate breed content from genomic data?
The Wagyu Content Check (WCC) uses thousands of DNA markers spread across an animal’s genome to estimate the proportion of Wagyu genetics it has inherited.
In simple terms, every breed has its own genetic “signature”. Some DNA variants (known as alleles) are more common in Wagyu cattle, while others are more common in breeds such as Angus, Brahman, Holstein, or Jersey. By studying large groups of contemporary animals from each breed, we can determine how frequently different alleles occur within those populations.
When an animal is tested, its DNA profile is compared to these reference populations. The WCC examines the pattern of alleles across the genome and calculates how closely the animal’s genetic makeup matches the Wagyu reference population compared with other breeds.
Rather than looking for a single “Wagyu gene”, the WCC combines information from thousands of markers. If the animal carries many alleles that are common in the Wagyu reference population, its estimated Wagyu content will be higher. If it carries a greater proportion of alleles commonly found in other breeds, its estimated Wagyu content will be lower.
An easy way to think about it is like comparing an animal’s DNA “fingerprint” to a library of breed fingerprints. The closer the match to the Wagyu reference population, the higher the estimated Wagyu content.
Because the calculation is based on genome-wide allele frequencies, the result represents a statistical estimate of breed composition rather than a direct measurement. However, using thousands of DNA markers provides a robust and reliable assessment of Wagyu content that is generally more accurate than estimates based solely on pedigree or breed appearance.
How does Wagyu Content Check compare to the previous Crossbred Wagyu Test?
The Wagyu Content Check (WCC) and the Crossbred Wagyu Test (CWT) have the same core purpose: to provide a genomic estimate of Wagyu content, helping producers make more informed breeding, feeding, registration, and marketing decisions.
Importantly, validation testing has shown a high level of agreement between WCC and CWT results, providing confidence that Wagyu content estimates remain consistent between the two approaches.
The key difference is in how the analyses are delivered. WCC is now fully integrated into the AWA’s genetic evaluation pipeline, alongside the production of Wagyu Breeding Values (WBVs). This enables new WCC results to be generated automatically each week for animals with newly processed genotypes. In contrast, the CWT was administered through a third-party provider and conducted on an as-needed basis.
