Table 7 Estimates of variance components and genetic parameters for average daily gain (the best model is shown in bold).

Model	\(\:{\sigma\:}_{a}^{2}\)	\(\:{\sigma\:}_{d}^{2}\)	\(\:{\sigma\:}_{c}^{2}\)	\(\:{\sigma\:}_{m}^{2}\)	\(\:{\sigma\:}_{a.m}\)	\(\:{\sigma\:}_{e}^{2}\)	\(\:{\sigma\:}_{p}^{2}\)	\(\:{h}_{a}^{2}\)	\(\:{h}_{d}^{2}\)	\(\:{h}_{c}^{2}\)	\(\:{h}_{m}^{2}\)	e²	r_{a, m}	AIC
1	453.571					1871.31	3324.80	0.19 ± 0.03				0.81 ± 0.02		28034.95
2	450.776	405.77				1477.34	2333.23	0.19 ± 0.03	0.17 ± 0.07			0.63 ± 0.07		28033.12
3	171.902		277.506			1816.85	2366.26	0.08 ± 0.03		0.12 ± 0.01		0.80 ± 0.02		27996.11
4	168.513	460.623	279.947			1368.25	2277.34	0.07 ± 0.02	0.20 ± 0.07	0.12 ± 0.01		0.60 ± 0.07		27983.08
5	142.859			272.98		1902.07	2317.91	0.06 ± 0.02			0.12 ± 0.02	0.82 ± 0.02		28008.67
6	138.053	451.382		277.043		1462.83	2329.31	0.06 ± 0.02	0.19 ± 0.07		0.12 ± 0.02	0.63 ± 0.07		28006.10
7	139.954			261.990	12.421	1904.76	2318.13	0.06 ± 0.02			0.11 ± 0.02	0.82 ± 0.02	0.06 ± 0.21	28009.64
8	134.623	451.539		264.600	13.487	1456.39	2329.64	0.06 ± 0.02	0.19 ± 0.07		0.11 ± 0.02	0.62 ± 0.07	0.07 ± 0.23	28007.08
9	161.272		264.03	18.672		1822.19	2266.17	0.07 ± 0.02		0.12 ± 0.02	0.01 ± 0.02	0.80 ± 0.02		27986.73
10	157.192	461.381	266.395	18.890		1373.28	2277.39	0.07 ± 0.02	0.20 ± 0.07	0.12 ± 0.02	0.01 ± 0.02	0.61 ± 0.07		27983.85
11	156.485		262.610	14.804	7.352	1825.14	2266.40	0.07 ± 0.02		0.12 ± 0.01	0.01 ± 0.02	0.80 ± 0.02	0.15 ± 0.69	27987.71
12	150.757	462.83	264.429	13.515	10.135	1375.85	2277.52	0.07 ± 0.02	0.20 ± 0.07	0.12 ± 0.01	0.01 ± 0.02	0.60 ± 0.07	0.22 ± 0.77	27984.80

\(\:{\sigma\:}_{a}^{2}\)= additive genetic variance;\(\:\:{\sigma\:}_{d}^{2}\)= dominance genetic variance;\(\:\:{\sigma\:}_{c}^{2}\)= maternal permanent environmental variance;\(\:\:{\sigma\:}_{m}^{2}\)= maternal genetic variance; \(\:{\sigma\:}_{a.m}\)=direct-maternal additive genetic covariance; \(\:{\sigma\:}_{e}^{2}\)= residual variance; \(\:{\sigma\:}_{p}^{2}\)= phenotypic variance;\(\:\:{h}_{a}^{2}\)= additive heritability; \(\:{h}_{d}^{2}\)= dominance heritability; \(\:\:{h}_{c}^{2}\)= maternal permanent environmental effect, \(\:{h}_{m}^{2}\)= maternal heritability; e²: ratio of residual variance to phenotypic variance; r_{a, m}= direct-maternal additive genetic correlation; AIC= Akaike’s information criterion.

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