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Table 1 Descriptive statistics for six egg production traits in the F2 population

From: Genome-wide association and selective sweep analyses reveal genetic loci for FCR of egg production traits in ducks

  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
  1. The difference in the number of individuals between traits are mainly due the death of some ducks before phenotyping
  2. 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