TABLE 3.

Description of production traits evaluated to be genetically correlated with yearling temperament score, as defined by the American Angus Association.

Symbol	Trait EBV	Unit and description a
CED	Calving ease-direct	Percentage of unassisted births (calf measurement/direct genetic effect)
BW	Birth weight	Pounds
WW	Weaning weight	Pounds, direct genetic effect
YW	Yearling weight	Pounds
RADG	Residual average daily gain	Pounds per day, the sire’s ability for post-weaning gain in his progeny given a constant amount of feed consumed
DMI	Dry-matter intake	Pounds per day
YH	Yearling height	Inches
SC	Scrotal circumference	Centimeters
PAP	Pulmonary artery pressure	Probability, the sire’s ability to produce a progeny with lower (or greater) pulmonary arterial pressures probability, decreasing (or increasing) the risk of contracting high altitude diseases
HP	Heifer pregnancy	Percentage, it measures the ability of the sire’s daughters to become pregnant as first-calf heifers during a normal breeding season
CEM	Calving ease maternal	Percentage of unassisted births (cow measurement/maternal genetic effect)
MILK	Maternal milk	Pounds of calf weaned, the sire’s genetic merit for milk and mothering ability as expressed in his daughters (maternal genetic effect of WW)
MW	Mature weight	Pounds
MH	Mature height	Inches
CW	Carcass weight	Pounds
MARB	Marbling score	Marbling score
RE	Ribeye area	Square inches
FAT	Fat thickness	Inches, the sire’s ability to transmit fat thickness at the 12th rib (as measured between the 12th and 13th ribs) to his progeny
FOOT	Foot angle score	Foot-angle score, the sire’s ability to transmit ideal foot angle to his progeny, of which a lower value is desirable
HS	Hair shed score	Hair shed score, the sire’s ability to transmit early (or late) summer hair shedding, of which a lower value is desirable

EBV: Estimated breeding value.

^aSource: American Angus Association website (www.angus.org/mobile/nce/definitions.aspx).