Table 2.

Log likelihood (LogL) values and likelihood ratio test (LRT) of comparable models in the Yorkshire and Landrace CORE datasets

Trait1	Model2	LogL3	Compared4	LRT5	df6	P-value
Yorkshire
BW	Model 1	7,223.8	1 vs. 4	1,985.8	2	<0.0001
	Model 2	7,674.8	2 vs. 4	1,083.8	1	<0.0001
	Model 3	8,130.2	3 vs. 4	173.0	1	<0.0001
	Model 4	8,216.7
WW	Model 1	−10,911.0	1 vs. 4	1,632.0	2	<0.0001
	Model 2	−10,571.2	2 vs. 4	952.4	1	<0.0001
	Model 3	−10,155.9	3 vs. 4	121.8	1	<0.0001
	Model 4	−10,095.0
PW	Model 1	−5,239.3	1 vs. 4	446.2	2	<0.0001
	Model 2	−5,172.2	2 vs. 4	312.0	1	<0.0001
	Model 3	−5,032.4	3 vs. 4	32.4	1	<0.0001
	Model 4	−5,016.2
Landrace
BW	Model 1	8,343.2	1 vs. 4	2,379.0	2	<0.0001
	Model 2	9,028.7	2 vs. 4	1,008.0	1	<0.0001
	Model 3	9,331.4	3 vs. 4	402.6	1	<0.0001
	Model 4	9,532.7
WW	Model 1	−10,300.2	1 vs. 4	1,691.2	2	<0.0001
	Model 2	−9,997.3	2 vs. 4	1,085.4	1	<0.0001
	Model 3	−9,531.2	3 vs. 4	153.2	1	<0.0001
	Model 4	−9,454.6
PW	Model 1	−5,823.0	1 vs. 4	607.6	2	<0.0001
	Model 2	−5,709.3	2 vs. 4	380.2	1	<0.0001
	Model 3	−5,552.7	3 vs. 4	67.0	1	<0.0001
	Model 4	−5,519.2

¹BW = birth weight; WW = weaning weight; PW = probe weight.

²1. Direct additive genetic effect; 2. Direct additive genetic effect and maternal genetic effect; 3. Direct additive genetic effect and common litter effect; 4. Direct additive genetic, maternal genetic and common litter effect.

³LogL= Log likelihood.

⁴Compared reduced model (Models 1, 2, and 3) vs. full model (Model 4).

⁵LRT: $X^2$ test statistic for the likelihood ratio test = −2 (LogL_{reduced model} – LogL_{full model}).

⁶Degrees of freedom for the $X^2$ test statistic.