Table 3.
Genetic correlations (SE) between feed efficiency traits (feed conversion ratio (FCR); residual feed intake (RFI)) and excretion traits recorded in performance test station in three commercial populations
| RFI | FCR | |||||
|---|---|---|---|---|---|---|
| Traits | Landrace | Large White | Pietrain | Landrace | Large White | Pietrain |
| FCR | 0.53 (0.07) | 0.52 (0.05) | 0.85 (0.04) | – | – | – |
| DFI | 0.61 (0.06) | 0.55 (0.05) | 0.48 (0.09) | 0.51 (0.07) | 0.37 (0.06) | 0.20 (0.11) |
| ADG | 0.07 (0.11) | 0.16 (0.08) | −0.05 (0.12) | −0.51 (0.07) | −0.39 (0.06) | −0.42 (0.09) |
| Ne | 0.48 (0.07) | 0.46 (0.06) | 0.84 (0.04) | 0.99 (0.00) | 0.99 (0.00) | 0.99 (0.00) |
| Pe | 0.52 (0.07) | 0.51 (0.05) | 0.85 (0.04) | 0.99 (0.00) | 0.99 (0.00) | 0.99 (0.00) |
| Nr | 0.41 (0.07) | 0.38 (0.06) | 0.83 (0.04) | 0.97 (0.01) | 0.97 (0.01) | 0.98 (0.01) |
| Pr | 0.52 (0.07) | 0.52 (0.05) | 0.86 (0.04) | 0.99 (0.01) | 0.99 (0.01) | 0.99 (0.01) |
Adapted from Saintilan et al. (2013).
DFI=average daily feed intake; ADG=average daily gain; Ne=N quantity excreted during the test period; Pe=P quantity excreted during the test period; Nr=proportion of retained nitrogen relative to feed intake; Pr=proportion of retained phosphorus relative to feed intake.