Table 1.
Descriptive statistics for six egg production traits in the F2 population
| N | Mean | SD | Minimum | Maximum | Skewness | Kurtosis | CV (%) | |
|---|---|---|---|---|---|---|---|---|
| HP (mm) | 338 | 46.4 | 3.6 | 36.2 | 61.2 | 0.24 | 0.56 | 7.69 |
| FI (g) | 330 | 7112 | 1113 | 3247 | 10,525 | − 0.05 | 0.41 | 15.65 |
| EW (g) | 330 | 2741 | 3889 | 1267 | 3633 | − 1.17 | 2.21 | 14.18 |
| FCR (%) | 330 | 2.9 | 1.5 | 1.9 | 15.5 | 5.76 | 38.10 | 50.00 |
| DFI (g) | 330 | 195.6 | 32.0 | 199.1 | 292.4 | − 0.09 | 0.24 | 16.34 |
| EP | 330 | 89.0 | 18.6 | 30.0 | 120.0 | − 0.93 | 0.58 | 20.88 |
The difference in the number of individuals between traits are mainly due the death of some ducks before phenotyping
HP, hip-width (35-week old ducks); FI, feed intake (determined over 37 days); EW, egg weight (determined over 37 days); FCR, feed conversion ratio (determined over 37 days); DFI, daily feed intake; EP, egg production (between 226 and 329 days of age); CV, coefficient of variation; N, sample number for determination; SD, standard deviation