Table 2.

Estimates of genetic parameters for egg production traits in the F₂ population

	HP	FI	EW	FCR	DFI	EP
HP	0.43	0.14*	0.04	0.01	0.11*	− 0.04
FI	0.127*	0.51	0.54**	0.26**	1.00**	0.33**
EW	0.04	0.53**	0.25	− 0.67**	0.54**	0.77**
FCR	0.05	0.19**	− 0.64**	0.23	0.26**	− 0.55**
DFI	0.10	0.96**	0.50**	0.19**	0.51	0.41**
EP	− 0.09	0.23**	0.57**	-0.40**	0.33**	0.10

On the diagonal, in italic characters heritability estimates

Upper triangle, phenotypic correlations

Lower triangle, genetic correlations

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)

Significant differences among groups are indicated as **P < 0.01 and *P < 0.05