Genotype-by-environment interactions for reproduction, body composition, and growth traits in maternal-line pigs based on single-step genomic reaction norms

Table 2 Estimates of variance components for the intercept and slope for all the models with homogenous (RNM1) and heterogeneous (RNM2) residual variances

Traits	RNM1						RNM2						AIC^a
Traits	a		pe		ce		a		pe		ce		AIC^a
TNB^b	1.0325	0.3011	0.9173	0.3490	0.1146	0.0327	1.0024	0.2533	0.7903	0.1294	0.1132	0.0199	950,276.38
TNB^b	0.7150	0.1718	0.9999	0.1328	0.9999	0.0932	0.6020	0.1766	0.9989	0.0212	0.9976	0.0035	948,339.79
NBA	0.8056	0.1612	0.7395	0.2975	0.0913	0.0203	0.8014	0.1620	0.6462	0.1199	0.0882	0.0185	936,031.17
NBA	0.4290	0.1754	0.7592	0.2076	0.3627	0.0344	0.4247	0.1816	0.3273	0.2078	0.3178	0.0382	935,390.49
NW	0.2806	− 0.0360	0.1117	− 0.0289	0.1428	− 0.0902	0.2804	− 0.0353	0.1005	0.0164	0.1447	− 0.0892	38,228.143
NW	− 0.9935	0.0047	− 0.3316	0.0679	− 0.9999	0.0570	− 0.9866	0.0046	0.1839	0.0788	− 0.9999	0.0550	8228.26
WW	0.1988	0.0415	−	−	0.9854	− 0.0040	0.1348	− 0.0184	−	−	0.9831	− 0.0014	100,784.49
WW	0.5099	0.0334	−	−	− 0.5599	0.0001	− 0.3686	0.0185	−	−	− 0.2317	0.0000	100,780.17
OW	102.570	31.4820	−		32.7150	0.7261	56.9330	8.9481	−	−	33.0810	0.3088	790,691.03
OW	0.9776	10.110	−	−	0.9915	0.0164	0.9423	1.5838	−	−	0.9985	0.0029	790,366.96
ND	10.5220	0.4543	−	−	3.4842	1.0041	10.3670	0.8726	−	−	3.4046	1.0458	127,475.18
ND	0.9409	0.0222	−	−	9989	0.2900	0.9855	0.0756	−	−	0.9977	0.3227	127,497.83
BF	7.3740	0.5134	−	−	1.2345	− 0.2079	7.3650	0.5051	−	−	1.2332	− 0.2083	109,070.95
BF	0.5726	0.1090	−	−	− 0.9994	0.0351	0.5668	0.1078	−	−	− 0.9937	0.0356	109,072.95

TNB, total number of piglets born; NBA, number of piglets born alive; NW, number of piglets weaned; WW, weaning weight (kg); OW, off-test weight (kg); MD, ultrasound muscle depth (mm); BF, ultrasound backfat thickness (mm)
a, animal (additive genetic) effect; pe, animal permanent environmental effect across parities; ce, litter effect
^aThe two Akaike Information Criterion (AIC) values are referred to RNM1 and RNM2, respectively
^bIn the 2 × 2 block between every trait and random effect, the diagonals, upper triangular and lower triangular represent additive genetic variance, covariance and genetic correlation for the intercept and slope coefficients, respectively. The residual variances for both models (RNM1 and RNM2) are in Additional file 1: Table S3

ISSN: 1297-9686