Table 3.
Genetic correlations with production traits of most commonly used feed efficiency traits: feed conversion ratio (FCR), residual feed intake (RFI), and coefficient of digestibility (CDU)
| Trait | Genetic correlation with production traits | References |
|---|---|---|
| FCR | body weight at 38 days (0.07), body weight at 42 days (0.35), feed intake (0.38), leg/breast weight (0.10), liver weight (0.23), heart weight (0.16), abdominal fat content (0.35) | Gaya et al. (2006) |
| leg yield (-0.70), abdominal fat yield (0.44), breast yield (0.00) | N’dri et al. (2006) | |
| metabolic body weight (0.57), body weight gain (-0.14), FI (0.54) | Aggrey et al. (2010) | |
| body weight (0.11) | Ankra-Badu et al. (2010) | |
| average daily feed intake (0.91) | Howie et al. (2011) | |
| body weight gain (-0.55), FI (0.45) | Aggrey et al. (2014) | |
| RFI | body weight 4 wk (-0.18), body weight gain (-0.13) | Zhang et al. (2003) |
| leg yield (-0.32), abdominal fat yield (0.44), breast yield (-0.35) | N’dri et al. (2006) | |
| metabolic body weight (0.45), body weight gain (0.06), feed intake (0.33) | Aggrey et al. (2010) | |
| body weight gain (-0.02), FI (0.29) | Aggrey et al. (2014) | |
| body weight 0–4 wk (0.17), body weight 5–6 wk (0.27) | González-Cerón et al. (2015) | |
| CDU (total dry matter) | body weight at 23 days (0.16) | De Verdal et al. (2011) |