Table 1.

EBVs and IBW in the reference population.

Population	Number of piglets	EBVs	IBW (kg)
All pigs	522	-0.03 ± 0.40	1.64 ± 0.35
HEBV	24	0.73 ± 0.17a	2.29 ± 0.14a
LEBV	24	-0.80 ± 0.12b	1.01 ± 0.18b
P		< 0.01	< 0.01

HEBV: high estimated breeding value population; LEBV: low estimated breeding value population; IBW: individual birth weight. Values are shown as mean ± standard deviation. A student's t-test was used to compare the significant difference between HEBV and LEBV in EBVs and IBW, respectively. P value < 0.05 or 0.01 is considered statistically significant or extremely significant level, respectively. The different lowercase letters between HEBV and LEBV indicate that the difference reached the significance level of P < 0.05.