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

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

ISSN: 1297-9686