Using social interaction models for genetic analysis of skin damage in gilts

Table 2 Estimates of variance components and genetic parameters

Model	\({\upsigma }_{{\mathrm{u}}_{\mathrm{D}}}^{2}\)	\({\upsigma }_{{\mathrm{u}}_{\mathrm{S}}}^{2}\)	\({\upsigma }_{\mathrm{gr}}^{2}\)	\({\upsigma }_{\mathrm{cl}}^{2}\)	\({\upsigma }_{\mathrm{cg}}^{2}\)	\({\mathrm{h}}^{2}/{\mathrm{T}}^{2}\)	\({\mathrm{r}}_{{\mathrm{u}}_{\mathrm{DS}}}\)	AIC
1	14.08	–	72.28	8.91	16.60	0.03	–	403,929.9
2	14.21	0.29	68.84	8.60	15.79	0.10	− 0.05	290,191.0

\({\upsigma }_{{\mathrm{u}}_{\mathrm{D}}}^{2}\) direct genetic variance, \({\upsigma }_{{\mathrm{u}}_{\mathrm{S}}}^{2}\) social genetic variance, \({\upsigma }_{\mathrm{gr}}^{2}\) pen group variance, \({\upsigma }_{\mathrm{cl}}^{2}\) common litter variance, \({\upsigma }_{\mathrm{cg}}^{2}\) contemporary group variance, \({\mathrm{h}}^{2}\) heritability, \({\mathrm{T}}^{2}\) the total heritable variance relative to the phenotypic variance, \({\mathrm{r}}_{{\mathrm{u}}_{\mathrm{DS}}}\) genetic correlation between direct and social genetic effects

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