Researchers from Cornell University, Kansas State University, Colorado State University and Texas A&M University collaborating in the National Cattlemen's Beef Association's Carcass Merit Project reported on the results of Warner-Bratzler shear force measures of tenderness on progeny of 27 Simmental bulls with a total of 310 progeny. The estimate of heritability was 0.48, which is higher than most shear force heritability values to date.

The range in shear force EPD also was relatively large from .29 kilograms for the most tender sire to 1.6 kg for the least tender sire, a difference of .45 kg (1.0 pounds). All in all, these data suggest that selection for tenderness in the Simmental breed could prove to be quite effective. The authors also reported the genetic correlations of shear force with other important carcass traits. The correlations with marbling, ribeye area, and carcass weight were zero, indicating that selection for reduced shear force would not effect these traits. The correlations with fat thickness and yield grade indicated that selection for reduced shear force could be accompanied by some increase in carcass fatness.