Association of Inactive Myostatin in Piedmontese-Influenced Steers and Heifers on Performance and Carcass Traits at Different Endpoints

Authors

Stephanie K. Moore, University of Nebraska-Lincoln
Cody J. Schneider, University of Nebraska-Lincoln
Kelsey Rolfe Rolfe, University of Nebraska-LincolnFollow
Brandon L. Nuttelman, University of Nebraska-LincolnFollow
Dirk Burken, University of Nebraska-LincolnFollow
William A. Griffin, University of Nebraska-Lincoln
Josh R. Benton, University of Nebraska-Lincoln
Galen E. Erickson, University of Nebraska-LincolnFollow
Matthew L. Spangler, University of Nebraska-LincolnFollow

Date of this Version

2013

Citation

Published in 2013 Nebraska Beef Cattle Report.

Comments

Copyright © 2013 The Board of Regents of the University of Nebraska. Used by permission. All rights reserved.

Abstract

Performance and carcass traits were evaluated using Piedmontese-influenced calf-fed steers and yearling heifers genotyped for zero, one, or two copies (homozygous active, heterozygous, or homozygous inactive, respectively) of the inactive myostatin allele. Steers and heifers had similar responses across genotypes in performance and carcass traits evaluated at different endpoints. Inactive myostatin decreased DMI, final BW (live), and ADG (live). Increased dressing percentage resulted in increased carcass-adjusted ADG and improved feed conversion for cattle with inactive myostatin. Cattle with inactive myostatin are leaner with larger LM area when finished to equal carcass weight.