Table 1.
Effect of ranking pigs by RFI on growth performance parameters
| Parameter | HRFI (n = 9) | LRFI (n = 9) | P-valueb |
|---|---|---|---|
| RFI | 0.13 ± 0.050 | − 0.23 ± 0.10 | < 0.001*** |
| FCR | 2.62 ± 0.19 | 2.20 ± 0.17 | < 0.001*** |
| ADFI (kg/day) | 2.67 ± 0.31 | 2.22 ± 0.26 | < 0.001*** |
| ADG (kg/day) | 1.02 ± 0.12 | 1.01 ± 0.070 | 0.86 |
| 100 kg BF (cm) | 12.82 ± 2.08 | 11.17 ± 2.28 | 0.13 |
| 90 d BW (kg) | 44.44 ± 8.39 | 41.20 ± 7.51 | 0.40 |
| 160 d BW (kg) | 114.16 ± 13.45 | 110.11 ± 10.60 | 0.41 |
The data were expressed as the mean values ± standard deviation (SD)
RFI residual feed intake, FCR feed conversion ratio, ADFI average daily feed intake, ADG average daily gain, 100 kg BF 100 kg back fat thickness, 90 d BW 90 day body weight, 160 d BW 160 day body weight
bThe P values were determined using Welch’s t test (*P < 0.05; **P < 0.01; ***P < 0.001)