All KW bulls are tested with Zoetis
American Angus Association Genomic Enhanced EPDs
Genomic results are a way to enhance predictability of current selection tools, to achieve more accuracy on EPDs for
younger animals, and to characterize genetics for traits where itʼ
the trait, such as carcass traits in breeding stock or maternal traits in bulls. With the investment in genomic technology,
this means that in addition to the pedigree, performance and progeny information that are used in the calculation and
reporting of Angus EPDs, genomic test results have also been incorporated into the EPD.
Genomic-enhanced EPDs (GE-EPDs) are important because they make use of the results from the DNA test in addition
to all other sources of information to provide added accuracy and reliability to the animalʼs EPD. In fact, depending on
the trait, GE-EPDs on unproven animals have the same amount of accuracy as if they had already sired 8-20 calves.
It is important ot note that genomics do not completely descibe the variation in the traits of interest. Phenotypic measures
collected by Angus breeders, such as birth, weaning and yearling weights, ultrasound scan data, carcass data, etc., continue
to be an important part in further development of improved genomic panels, not to mention an important component in EPD
calculation.
How Are Genomic Tests Reported?
The results of genomic testing are provided in percentile rankings, based on a reference population of more than 87,000
tested Angus animals. Ranks range from 1 to 100 with lower numbers generally favored for the most traits (see chart). Some
traits for which percent ranks are available are not yet included in GE-EPDs powered by HD50K. These include ranks for
their bull customers, cattle feeders, and consumers.
When making selection decisions for traits that have EPDs provided by the AAA, then the EPDs should be the selec-
tion tool of choice. The EPD and accuracy account for all sources of information available on the animal - pedigree,
own record, weights/measures, and genomic results.
Traits measured by HD50K Percent Rank Favorable
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If you would like a complete listing, please contact the ranch.
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