Table 3.
Model-adjusted mean carcass characteristics of heifers implanted with Revalor-IH followed by reimplant with Revalor-200 (REPEATED) or a single Revalor-XH at arrival (SINGLE)
| Implant programa | ||||
|---|---|---|---|---|
| Item | REPEATED | SINGLE | SEM | P-value |
| Dressing, %b | 64.54 | 64.22 | 0.120 | 0.01 |
| HCW, kgb | 384 | 382 | 2.8 | 0.02 |
| Ribeye area, cm2c | 91.87 | 89.55 | 0.839 | 0.01 |
| Marblingc,d | 503 | 505 | 5.2 | 0.74 |
| Rib fat, cmc | 1.78 | 1.83 | 0.025 | 0.01 |
| Calculated YGe | 2.82 | 2.97 | 0.040 | 0.01 |
| USDA YG, %e | ||||
| 1 | 6.61 | 4.26 | — | 0.03 |
| 2 | 31.04 | 25.71 | ||
| 3 | 43.24 | 45.80 | ||
| 4 | 16.38 | 20.75 | ||
| 5 | 2.72 | 3.48 | ||
| USDA QG, %f | ||||
| Prime | 5.41 | 7.02 | — | 0.01 |
| Choice | 78.41 | 79.70 | ||
| Select | 14.47 | 11.98 | ||
| Other | 1.71 | 1.30 | ||
aTreatments were: Revalor-IH (80 mg TBA and 8 mg E2, uncoated) on arrival followed by Revalor-200 (200 mg TBA and 20 mg E2, uncoated) at approximately 70 to 101 DOF; or Revalor-XH (80 mg TBA and 8 mg E2, uncoated; 120 mg TBA and 12 mg E2, coated; 200 mg TBA and 20 mg E2, total) on arrival (SINGLE).
bCarcasses = 17,167, pens = 180, blocks = 54, studies = 6; DOF range = 145–222, mean = 180 DOF.
cCarcasses = 13,895, pens = 126, blocks = 45, studies = 5; DOF range = 145–192, mean = 171 DOF.
dSmall00 = 400.
eCarcasses = 17,159, pens = 180, blocks = 54, studies = 6; DOF range=145–222, mean = 180 DOF.
fCarcasses = 17,160, pens = 180, blocks = 54, studies = 6; DOF range = 145–222, mean = 180 DOF.