Table 2.
Mean values (LS-means ± SEM) for live weight (LW), carcass weight (CW), and cut-up yields among CONV strains of broiler chickens at Target Weights 1 and 2.
| Strain |
||
|---|---|---|
| Variable | B | C |
| Target weight 11 | ||
| Live wt (g) | 1,959 ± 54.4 | 1,807 ± 50.1 |
| Carcass wt (g) | 1,369 ± 40.8 | 1,288 ± 38.3 |
| Breast wt (g) | 393.5 ± 15.40 | 407.8 ± 15.95 |
| Thigh wt (g) | 214.5 ± 6.76 | 191.9 ± 6.04 |
| Drumstick wt (g) | 174.9 ± 4.23 | 167.8 ± 4.05 |
| Wing wt (g) | 137.7 ± 3.83 | 132.0 ± 3.68 |
| Carcass yield (% LW)2 | 69.9 ± 0.67 | 71.3 ± 0.68 |
| Breast yield (% CW) 3 | 28.7 ± 0.48b | 31.7 ± 0.53a |
| Breast yield (% LW) | 20.1 ± 0.38b | 22.6 ± 0.43a |
| Thigh yield (% CW) | 15.7 ± 0.39 | 14.9 ± 0.37 |
| Thigh yield (% LW) | 10.9 ± 0.27 | 10.6 ± 0.26 |
| Drumstick yield (% CW) | 12.8 ± 0.20 | 13.0 ± 0.20 |
| Drumstick yield (% LW) | 8.9 ± 0.14 | 9.3 ± 0.14 |
| Wing yield (% CW) | 10.1 ± 0.18 | 10.2 ± 0.19 |
| Wing yield (% LW) | 7.0 ± 0.13 | 7.3 ± 0.13 |
| Target weight 24 | ||
|---|---|---|
| Live wt (g) | 3,288 ± 74.5 | 3,283 ± 91.1 |
| Carcass wt (g) | 2,411 ± 58.6 | 2,419 ± 72.0 |
| Breast wt (g) | 780.4 ± 24.93 | 850.2 ± 33.28 |
| Thigh wt (g) | 360.7 ± 9.28 | 341.9 ± 10.77 |
| Drumstick wt (g) | 303.5 ± 5.99 | 299.2 ± 7.23 |
| Wing wt (g) | 234.2 ± 5.33 | 219.2 ± 6.11 |
| Carcass yield (% LW) | 73.4 ± 0.57 | 73.7 ± 0.71 |
| Breast yield (% CW) | 32.3 ± 0.44b | 35.1 ± 0.59a |
| Breast yield (% LW) | 23.7 ± 0.37b | 25.9 ± 0.49a |
| Thigh yield (% CW) | 14.9 ± 0.30 | 14.1 ± 0.35 |
| Thigh yield (% LW) | 11.0 ± 0.22 | 10.4 ± 0.26 |
| Drumstick yield (% CW) | 12.6 ± 0.16 | 12.4 ± 0.19 |
| Drumstick yield (% LW) | 9.2 ± 0.11 | 9.1 ± 0.14 |
| Wing yield (% CW) | 9.7 ± 0.14 | 9.1 ± 0.16 |
| Wing yield (% LW) | 7.1 ± 0.11 | 6.7 ± 0.12 |
At Target Weights 1 and 2, CONV strains were 34 and 48 d, respectively.
a-bDifferent superscripts within the same row represent differences among categories (P < 0.05).
1
Number of birds per strain at target weight 1: Strain B: n = 32; Strain C: n = 32.
2
Yields calculated relative to live weight obtained 1 d before processing.
3
Yields calculated as a ratio to the eviscerated carcass weight.
4
Number of birds per strain at target weight 2: Strain B: n = 48; Strain C: n = 32.