Table 1.

Phenotypic data for the two groups of female pigs selected for high (n = 25) or low feed efficiency (n = 25)

Class	Variable	Starting day of grow-finishing phase	Final day of grow-finishing phase	Starting BW, kg	Final BW, kg	ADFI, kg/d	ADG, kg/d	RFI	FCR
High FE	Average	30.2	111	30.8	100	1.96	0.864	−0.077	2.29
	Standard deviation	4.54	8.26	1.22	0.930	0.167	0.061	0.095	0.079
Low FE	Average	29.6	118	30.9	99.7	2.01	0.82	0.038	2.60
	Standard deviation	3.30	8.61	1.38	1.23	0.162	0.098	0.146	0.089
P-value	–	0.884	5.59 × 10−2	0.984	0.023	0.28	6.43 × 10−1	1.90 × 10−2	< 0.0001

Statistical significance was determined using one-way ANOVA, unpaired Student t-test and Wilcoxon rank sum test. BW body weight; ADFI average daily feed intake; ADG average daily gain; RFI residual feed intake; FCR, feed conversion ratio