Geneticists from Missouri, Georgia, and the U.S. Department of Agriculture's station at Miles City, Montana combined in an effort to develop an index for multiple trait selection in beef cattle. Their objective was to develop a selection index for improved profit for a defined production scenario. Steer progeny records and carcass data were collected from progeny of 26 Angus sires. Expected progeny differences were calculated for birth weight, weaning weight, post weaning, average daily gain, marbling score, yield grade and fertility.

Relative economic values were estimated for each trait. Sire differences in profit per progeny were then estimated. From the 26 sires studied, there was a range of average profits of $39.81 per progeny from the highest to the lowest ranking bull.