Table 1. Performance and feed efficiency data of low and high residual feed intake (RFI) broiler chickens raised at two geographical locations (L).
| L1a | L2a | P-Value | ||||||
|---|---|---|---|---|---|---|---|---|
| Item | Low RFI | High RFI | Low RFI | High RFI | SEM | RFI | L | RFI × L |
| Females | ||||||||
| TFI, d 7–36 of life (g) | 3334 | 3751 | 3559 | 3797 | 127.1 | 0.027 | 0.479 | 0.566 |
| TBWG, d 7–36 of life (g) | 2251 | 2279 | 1966 | 1856 | 69.9 | 0.647 | <0.001 | 0.643 |
| RFI (g) | -195 | 97 | -267 | 232 | 28.4 | <0.001 | 0.412 | 0.201 |
| FCR (g/g) | 1.46 | 1.62 | 1.65 | 1.89 | 0.027 | <0.001 | <0.001 | 0.108 |
| Males | ||||||||
| TFI, d 7–36 of life (g) | 3682 | 4185 | 3823 | 4321 | 99.1 | <0.001 | 0.340 | 0.573 |
| TBWG, d 7–36 of life (g) | 2573 | 2615 | 2228 | 2214 | 77.1 | 0.582 | <0.001 | 0.560 |
| RFI (g) | -183 | 303 | -211 | 231 | 30.9 | <0.001 | 0.149 | 0.610 |
| FCR (g/g) | 1.41 | 1.61 | 1.58 | 1.79 | 0.028 | <0.001 | <0.001 | 0.774 |
Data are presented as least-square means and pooled standard error of the mean (SEM).
a L1, University of Veterinary Medicine Vienna (Vienna, Austria); L2, Agri-Food and Biosciences Institute (Hillsborough, Northern Ireland, UK). TFI, total feed intake; TBWG, total body weight gain; FCR, feed conversion ratio.