EPD and test data INFORMATION
How to read the figures provided with each bull
SIRE EVALUATION AC - Accuracy is the reliability that can be placed on the EPD. An accuracy of close to 1.0 indicates higher reliability. Accuracy is affected by the number of progeny and ancestral records included in the analysis. $ EN - Cow Energy Value, expressed in dollar savings per cow per year, assesses differences in cow energy requirements as an expected dollar savings difference in daughters of sires. A larger value is more favorable when comparing two animals (more dollars saved on feed energy expenses). Components for computing the cow $EN savings difference include lactation energy requirements and energy costs associated with differences in mature cow size. $ W - Weaned Calf Value, an index value expressed in dollars per head, is the expected average difference in future progeny performance for preweaning merit. $W includes both revenue and cost adjustments associated with differences in birth weight, weaning direct growth, maternal milk and mature cow size. $ F - Feedlot Value, an index value expressed in dollars per head, is the expected average difference in future progeny performance for postweaning merit compared to progeny of other sires. $ G - Grid Value, an index value expressed in dollars per head, is the expected average difference in future progeny performance for carcass grid merit compared to progeny of other sires. $ B - Beef Value, an index value expressed in dollars per head, is the expected average difference in future progeny performance for postweaning and carcass value compared to progeny of other sires. CARCASS TRAITS - The registration papers do have the Carcass EPD ’ s for the explained below. • MEPD - Marbling EPD, expressed as a fraction of USDA marbling score, is a predictor of the difference in marbling of a sire ’ s progeny compared to progeny of other sires. • REPD - Ribeye Area EPD, expressed in square inches, is a predictor of the difference in ribeye area of a sire ’ s progeny compared to progeny of other sires. • FEPD - Fat Thickness EPD, expressed in inches, is a predictor of the differences in external fat thickness at the 12 th rib of a sire ’ s progeny com- pared to progeny of other sires. MATERNAL TRAITS $ C - Combined Value—expressed in dollars per head, is an index which includes all traits that make up both Maternal Weaned Calf Value ($M) and Beef Value ($B) with the objective that commercial producers will replace 20% of their breeding females per year with replacement heifers re- tained within their own herd. The remaining cull heifer and steer progeny are then assumed to be sent to the feedlot where the producers retain ownership of those cattle and eventually sell them on a quality-based carcass merit grid. $ M - Maternal Weaned Calf Value—an index expressed in dollars per head, to predict profitability differences in progeny due to genetics from con- ception to weaning. GROWTH AND MATERNAL EVALUATION • Age of Dam is the age of the Dam at the time each sale bull calved and is included with each sale bull pedigree. • Expected Progeny Difference ( EPD ) is the prediction of how future progeny of each animal are expected to perform relative to the progeny of other animals listed in the American Angus Sire Evaluation database. • EPDs are expressed in units of measure for the trait, plus or minus. The EPDs listed in this catalog reflect the most current EPDs provided by the American Angus Association through their Sire Evaluation Reports. PRODUCTION INFORMATION • CED - Calving Ease Direct is expressed as a difference in percentage of unassisted births, with a higher value indicating greater calving ease in first-calf heifers. It predicts the average difference in ease with which a sire ’ s calves will be born when he is bred to first-calf heifers. • BEPD - Birth Weight EPD, expressed in pounds, is a predictor of a sire ’ s ability to transmit birth weight to his progeny compared to that of other sires. • WEPD - Weaning Weight EPD, expressed in pounds, is a predictor of a sire ’ s ability to transmit weaning growth to his progeny compared to that of other sires. • Milk - Weaning Weight Maternal EPD, expressed in pounds of calf weaned, is a predictor of a sire ’ s genetic merit for milk and mothering ability as expressed in his daughters compared to daughters of other sires. It is that part of a calf ’ s weaning weight attributed to milk and mothering ability. • YEPD - Yearling Weight EPD, expressed in pounds, is a predictor of a sire ’ s ability to transmit yearling growth to his progeny compared to that of other sires. HERD INFORMATION • BW - Birth Weight, is the actual birth weight of each bull. • PAP - Pulmonary Arterial Pressure, is the score taken on each bull in the fall after summering at Tie Siding, Wyoming, at elevation of 7500 feet. Dr. Tim Holt did the PAP testing on September 3, 2025. • Scrotal - Scrotal Score, is the actual scrotal measurement taken by Dr. Holts, CSU staff, on January 27, 2026. THIS YEAR WE DID NOT ULTRASOUND THE BULLS FOR CARCASS —The carcass EPD ’ s are on their registration papers. Quite a few of the bull have no Carcass EPD ’ s on their registrations
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