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Table 5 Means and standard errors (M ± SE) of live animal performance and carcass characteristics of prime lamb progeny from different sire breeds

From: Performance and carcass characteristics of Australian purebred and crossbred lambs supplemented with Rice Bran

  Dorset White Suffolk Merino P value
Initial BW (kg) 37.3 ± 1.1 36.7 ± 0.6 31.8 ± 0.9 0.0002***
Final BW (kg) 46.8 ± 1.6 45.7 ± 1.0 40.1 ± 1.1 0.0016**
Total weight gain (kg) 9.5 ± 1.0 9.0 ± 0.7 8.3 ± 0.7 0.4418ns
Av. Daily gain (g) 194.5 ± 20.3 183.7 ± 14.5 169.0 ± 14.8 0.4418ns
Pre-slaughter weight (kg)c 47.0 ± 1.6 45.7 ± 1.0 42.2 ± 1.78 0.0540ns
HCW (kg)d 22.0 ± 0.9a 21.3 ± 0.8a 16.5 ± 0.9b 0.0030**
CCW (kg)d 21.7 ± 0.9a 21.0 ± 0.8a 16.2 ± 0.9b 0.0031**
Dressing percentage (%) 46.7 ± 0.8a 46.3 ± 1.2a 39.2 ± 1.7b 0.0078*
Fat thickness (mm) 4.7 ± 0.4a 4.3 ± 0.3a 3.3 ± 0.5b 0.0467*
Body wall thickness (mm) 16.1 ± 1.1 15.6 ± 0.7 13.8 ± 1.2 0.2648ns
GR fat score (1–5) 3.7 ± 0.3 3.6 ± 0.2 3.1 ± 0.3 0.3013ns
Yield grade 2.3 ± 0.5a 2.1 ± 0.1a 1.7 ± 0.8b 0.0470*
Rib eye area (cm2) 15.6 ± 0.5a 15.5 ± 0.5a 12.3 ± 0.8b 0.0022**
BCTRC %e 48.7 ± 0.2 49.0 ± 0.2 49.0 ± 0.3 0.5937ns
OTHf 109.8 ± 4.2a 106.3 ± 3.9a 82.5 ± 4.6b 0.0030**
  1. cPre-slaughter weight is the weight of animals (minus Merino ewes) prior to transport for slaughter. dHCW = Hot carcass weight. eCCW = Cold carcass weight. fBCTRC% = Boneless, Closely Trimmed Retail Cuts. fOTH = Over the hooks trade (this was based on 500¢ AU return per kg of HCW). Level of significance: ns not significant (p > 0.05), * significant (p < 0.05), ** highly significant (p < 0.01), and *** very highly significant (p < 0.001). Different superscripts indicate significant differences within each row (p < 0.05)