Table 5.
Mean values (LS-means ± SEM) for live weight (LW), carcass weight (CW), and cut-up yields among SLOW strains of broiler chickens at Target Weights 1 and 2.
| Variable | Strain |
|||
|---|---|---|---|---|
| D | J | K | N | |
| Target weight 11 | ||||
| Live wt (g) | 2,025 ± 56.2 | 2,072 ± 47.2 | 1,942 ± 44.2 | 1,967 ± 44.8 |
| Carcass wt (g) | 1,352 ± 40.3 | 1,444 ± 35.3 | 1,355 ± 33.1 | 1,346 ± 33.0 |
| Breast wt (g) | 281.9 ± 11.03c | 380.3 ± 12.21a | 324.9 ± 10.43bc | 341.8 ± 10.98ab |
| Thigh wt (g) | 228.0 ± 7.18 | 233.3 ± 6.05 | 223.1 ± 5.79 | 223.7 ± 5.80 |
| Drumstick wt (g) | 198.9 ± 4.80 | 197.7 ± 3.93 | 189.7 ± 3.77 | 184.0 ± 3.66 |
| Wing wt (g) | 158.4 ± 4.42 | 160.2 ± 3.67 | 160.9 ± 3.68 | 152.5 ± 3.49 |
| Carcass yield (% LW)2 | 66.8 ± 0.64b | 69.7 ± 0.55a | 69.8 ± 0.55a | 68.4 ± 0.54ab |
| Breast yield (% CW)3 | 20.8 ± 0.35c | 26.3 ± 0.36a | 24.0 ± 0.33b | 25.5 ± 0.36ab |
| Breast yield (% LW) | 13.9 ± 0.26c | 18.3 ± 0.29a | 16.7 ± 0.26b | 17.4 ± 0.27ab |
| Thigh yield (% CW) | 16.9 ± 0.42 | 16.1 ± 0.33 | 16.5 ± 0.34 | 16.7 ± 0.35 |
| Thigh yield (% LW) | 11.3 ± 0.28 | 11.2 ± 0.23 | 11.5 ± 0.23 | 11.4 ± 0.23 |
| Drumstick yield (% CW) | 14.7 ± 0.23a | 13.7 ± 0.17b | 14.0 ± 0.18ab | 13.7 ± 0.18b |
| Drumstick yield (% LW) | 9.8 ± 0.15 | 9.5 ± 0.12 | 9.8 ± 0.12 | 9.4 ± 0.12 |
| Wing yield (% CW) | 11.7 ± 0.21 | 11.1 ± 0.17 | 11.9 ± 0.18 | 11.3 ± 0.17 |
| Wing yield (% LW) | 7.8 ± 0.14 | 7.8 ± 0.14 | 8.3 ± 0.13 | 7.7 ± 0.12 |
| Target weight 24 | ||||
|---|---|---|---|---|
| Live wt (g) | 2,805 ± 65.1 | 2,936 ± 66.5 | 2,753 ± 62.7 | 2,746.1 ± 62.2 |
| Carcass wt (g) | 1,951 ± 48.7 | 2,134 ± 51.9 | 1,924 ± 47.0 | 1,974 ± 47.9 |
| Breast wt (g) | 429.4 ± 14.07c | 594.3 ± 18.99a | 492.7 ± 15.82bc | 512.3 ± 16.37ab |
| Thigh wt (g) | 326.8 ± 8.75 | 342.2 ± 8.80 | 320.6 ± 8.32 | 311.9 ± 8.02 |
| Drumstick wt (g) | 274.0 ± 5.66 | 281.6 ± 5.56 | 266.7 ± 5.30 | 261.8 ± 5.17 |
| Wing wt (g) | 221.9 ± 5.21 | 215.6 ± 4.91 | 220.6 ± 5.05 | 212.5 ± 4.84 |
| Carcass yield (% LW) | 69.5 ± 0.57c | 72.7 ± 0.57a | 69.9 ± 0.55bc | 71.9 ± 0.56ab |
| Breast yield (% CW) | 22.1 ± 0.31c | 27.8 ± 0.38a | 25.8 ± 0.35b | 25.9 ± 0.36b |
| Breast yield (% LW) | 15.3 ± 0.25c | 20.2 ± 0.31a | 17.9 ± 0.28b | 18.7 ± 0.29b |
| Thigh yield (% CW) | 16.8 ± 0.36 | 16.0 ± 0.33 | 16.8 ± 0.35 | 15.8 ± 0.32 |
| Thigh yield (% LW) | 11.7 ± 0.24 | 11.7 ± 0.23 | 11.7 ± 0.24 | 11.4 ± 0.23 |
| Drumstick yield (% CW) | 14.1 ± 0.17a | 13.2 ± 0.17b | 13.9 ± 0.18ab | 13.3 ± 0.17b |
| Drumstick yield (% LW) | 9.8 ± 0.13 | 9.6 ± 0.12 | 9.7 ± 0.12 | 9.5 ± 0.12 |
| Wing yield (% CW) | 11.4 ± 0.17a | 10.0 ± 0.15b | 11.5 ± 0.17a | 10.8 ± 0.16ab |
| Wing yield (% LW) | 7.9 ± 0.13a | 7.3 ± 0.11b | 8.0 ± 0.12a | 7.7 ± 0.12ab |
At Target Weight 1 and 2, SLOW strains were 48 and 62 d of age, respectively.
a-cDifferent superscripts within the same row represent differences among categories (P < 0.05).
1
Number of birds per strain at target weight 1: Strain D: n = 32; Strain J: n = 47; Strain K: n = 47; Strain N: n = 47.
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 D: n = 44; Strain J: n = 48; Strain K: n = 47; Strain N: n = 48.