Breeding and Genetics

Adjustment Factors for Ultrasound Measures in Yearling Angus Bulls and Developing Heifers

Authors
  • Doyle E. Wilson (Iowa State University)
  • Gene H. Rouse (Iowa State University)
  • Craig Hays (Iowa State University)

Abstract

Ultrasound measures for 12-13th rib fat thickness, rump fat thickness, ribeye area and % intramuscular fat have been collected on more than 27,000 yearling Angus bulls and more than 7,000 developing heifers as part of a two-year research program with the American Angus Association. The effects of the age of the cow producing the calf and the age of the calf at scanning time are significant and must be accounted for through adjustments to the actual ultrasound measures before breeders can use the information to compare animals within contemporary groups.

Keywords: ASL R1714

How to Cite:

Wilson, D. E., Rouse, G. H. & Hays, C., (2001) “Adjustment Factors for Ultrasound Measures in Yearling Angus Bulls and Developing Heifers”, Iowa State University Animal Industry Report 1(1).

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Published on
01 Jan 2001
Peer Reviewed