Accuracy (ACC)A measure of certainty regarding the genetic merit of a bull. Accuracy values are calculated for each evaluation according to Beef Improvement Federation (BIF) Guidelines and reported as a decimal number between zero and one. Larger values indicate greater accuracy.Active SireA bull that has had performance information reported on progeny born within the last two years or progeny born to a daughter calving for the first time at 33 months of age or less. B - DB - HB - NDRB = Black DB = Double Black HB = Homozygous Black NDR = Non-Diluted Red Birth WeightExpected progeny performance is reported in pounds. The EPD value predicts the difference in average birth eight of a bull's calves compared to calves of all other bulls evaluated. A positive value (+) indicates heavier-than-average birth weights while a negative value (-) indicates lighter-than-average birth weights.Calving EaseHeifers (H)- The ease with which a bull's calves are born to first calf heifers. A first-calf heifer is defined as a female calving for the first time at 33 months of age or less.Cows (C)- The ease with which a bull's calves are born to mature cows. A cow is defined as a female calving for a second or subsequent time. Expected progeny differences are reported as deviations in the percent unassisted births. When comparing calving ease EPDs of two sires, the larger EPD indicates a higher percent of unassisted births for calves sired by this bull. Carcass WeightThe hot carcass weight of a bull's progeny. Expected progeny performance is reported in pounds and adjusted to a slaughter age of 475 days. The EPD predicts the difference in average carcass weight of a bull's progeny compared to progeny of all other bulls evaluated. A positive value indicates heavier than average carcass weights while a negative value (-) indicates high than average carcass weights.D - P - H - S - HPDP = Double Polled P = Polled H = Horned S = ScurredHP = Homozygous Polled Expected Progeny Difference (EPD)The expected difference in performance of a bull's progeny when compared to average progeny performance of all bulls evaluated. Genetic Correlation Correlations between two traits that arise because the same genes affect both traits. When two traits are positively correlated (e.g., weaning and yearling weight), selection for an increase in one trait will result in an increase in the other trait. When two traits are negatively correlated (e.g. yearling weight and first-calving ease), selection for an increase in onetrait will result in a decrease in the other trait. Heritability
A subjective evaluation of the amount and distribution of intramuscular fat.
Degree of marbling is evaluated in the ribeye muscle between the 12th and
13th rib and is a major factor in determining USDA quality grade. Marbling
scores range for 1 (devoid) to 10 (abundant). Expected progeny performance
is reported in tenths of a marbling score and adjusted to a slaughter age of 475 days. The EPD value predicts the
difference in average marbling score of a bull's progeny compared to progeny
of all other evaluated bulls. A positive value indicates higher then average marbling scores while a negative value (-) indicates lower than |
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