Table 1.
Ambient temperature effects on performance and carcass parameters of commercial and crossbred (Brazilian Piau purebred sires × commercial dams) pigs.
| Commercial | Piau Crossbred | RMSE 1 | Statistical Analysis | |||||
|---|---|---|---|---|---|---|---|---|
| 22 °C | 30 °C | 22 °C | 30 °C | Gen | Temp | Gen × Temp | ||
| Number of pigs | 8 | 6 | 9 | 7 | ||||
| Performance parameters | ||||||||
| Initial body weight (kg) | 71.8 | 71.1 | 70.3 | 68.3 | 2.1 | <0.01 | <0.01 | 0.62 |
| Average daily feed intake (g/day) | 2933 | 2512 | 2669 | 2346 | 287 | 0.82 | <0.01 | 0.35 |
| Average daily gain (g/day) | 1015 | 773 | 724 | 596 | 193 | <0.01 | <0.01 | 0.39 |
| Feed conversion rate (g/g) | 2.96 | 3.55 | 3.75 | 4.11 | 0.87 | <0.01 | 0.01 | 0.86 |
| Final body weight (kg) | 78.9 | 76.5 | 75.4 | 72.4 | 1.4 | <0.01 | <0.01 | 0.39 |
| Carcass parameters | ||||||||
| Backfat thickness (mm) | 17.3 | 16.6 | 24.5 | 23.8 | 4.4 | <0.01 | 0.67 | 0.99 |
| Loin eye area (cm2) | 39.40 a | 32.52 b | 29.08 b | 29.20 b | 3.16 | <0.01 | 0.01 | 0.01 |
1 Root-Mean-Square Error. a,b within a row, least-square means with different superscript are statistically different (p < 0.05).