Table 1. Estimated breeding values for total number born per line for haplotypes containing Asian or European alleles at the AHR locus.

		Linear model						Animal model
Line	N	As-EBV	Eu-EBV	Estimate	s.e.	t-value	Significance	Effect	Se effect	F-value	P-value
All	2,586	0.038	−0.115	−0.163	0.039	−4.221	2.54e−05***	−0.07	0.03	5.65	0.018*
Line C	965	−0.091	−0.178	−0.089	0.040	−2.191	0.0287*	−0.04	0.09	0.19	0.66
Line B	568	0.242	0.113	−0.128	0.088	−1.461	0.144	−0.02	0.02	0.91	0.342
Line A	1,053	0.039	−0.167	−0.227	0.068	−3.329	0.000901***	−0.15	0.06	6.5	0.012*

EBV, estimated breeding value; TNB, total number of piglets born.

Two models were used to estimate the effect of the Asian allele: a linear model and an animal model. As-EBV is the EBV for haplotypes containing the Asian alleles and Eu-EBV is the EBV for European haplotypes under the linear model. ‘Estimate’ is the estimated effect of the origin of the haplotypes on TNB for the linear model and ‘Effect’ refers to the effect of the origin of haplotypes under the animal model. The effect was calculated for two reproduction-associated lines (line A, N=1,053 and Line B, N=568) and one growth-associated line (Line C, N=965). N is number of haplotypes in the line. Significant codes: 0.001‘***’ 0.01‘**’ 0.05‘*’ 0.1‘.’ 1.