Table 1.
Adjusted mean values of phenotypes and their estimates of heterosis
| Traits | Adjusted value (Mean ± SE) | Heterosis | ||||
|---|---|---|---|---|---|---|
| WL | WY | YW | YY | WY | YW | |
| RFI, g/d | 1.77 ± 0.72 | − 3.14 ± 0.75 | 3.72 ± 0.84 | − 2.26 ± 0.62 | 1181.63%* | − 1618.37%* |
| DFC, g/d | 100.27 ± 1.00 | 94.87 ± 0.98 | 103.28 ± 1.10 | 90.77 ± 0.91 | − 0.68% ns | 8.12%** |
| FCR, g/g | 2.67 ± 0.37 | 2.06 ± 0.04 | 2.94 ± 0.33 | 3.33 ± 0.38 | − 31.33%* | − 2.00%ns |
| DEM, g/d | 52.90 ± 0.91 | 47.80 ± 0.58 | 45.45 ± 0.69 | 36.77 ± 0.58 | 6.61%** | 1.37%ns |
RFI residual feed intake, DFC daily feed consumption, FCR feed conversion ratio, DEM daily egg mass, WL White Leghorn chicken, YY Beijing You chicken, WY and YW reciprocal crosses, respectively
ns not significant (P ≥ 0.05)
SE standard error
*P < 0.01.