Table 1. Least square means (± standard errors) of feed and digestive efficiency, body weight and feed intake in the high (FCR_H) and poor (FCR_L) feed efficiency groups.
| Traits 1 | FCR_L | FCR_H | Significance of FCR group effect |
|---|---|---|---|
| FCR (g.g -1 ) | 1.41 ± 0.05 | 2.02 ± 0.04 | <0.0001 |
| AMEn (kcal.kg -1 DM) | 3444 ± 44 | 2936 ± 39 | <0.0001 |
| CDUDM (%) | 73.1 ± 0.9 | 63.1 ± 0.8 | <0.0001 |
| CDUS (%) | 98.4 ± 1.1 | 88.2 ± 0.9 | <0.0001 |
| CDUL (%) | 84.8 ± 2.0 | 61.6 ± 1.8 | <0.0001 |
| CDUP (%) | 84.8 ± 0.6 | 76.8 ± 0.6 | <0.0001 |
| BW20 | 327.1 ± 6.0 | 319.5 ± 6.9 | 0.35 |
| BW23 | 426.3 ± 7.8 | 427.2 ± 8.92 | 0.92 |
| FI | 212.7 ± 4.1 | 166.5 ± 4.6 | <0.0001 |
1 FCR: feed conversion ratio between 17 and 20 d; AMEn: metabolisable energy corrected to zero nitrogen retention between 17 and 20 d; CDUDM, CDUS, CDUL, CDUP: coefficients of fecal digestive use of dry matter, starch, lipids, and proteins between 17 and 20 d; BW20, BW23: body weight at 20 and 23 days; FI: feed intake between 20 and 23 days.