Analysis of the causal structure of traits involved in sow lactation feed efficiency

Table 5 Posterior means (posterior SD) of variance components for the traits involved in lactation feed efficiency based on the structural equation model

Parameter	dLFI	dSWB	dLWG	dBFTB	SMBW
\({\upsigma }_{\mathrm{a}}^{2}\)	0.14 (0.03)	0.07 (0.02)	0.05 (0.009)	0.07 (0.02)	7.12 (1.40)
\({\upsigma }_{\mathrm{cg}}^{2}\)	0.28 (0.04)	0.12 (0.02)	0.03 (0.006)	0.17 (0.04)	3.33 (0.53)
\({\upsigma }_{\mathrm{p}}^{2}\)	0.07 (0.02)	0.04 (0.01)	0.008 (0.005)	0.08 (0.03)	6.01 (0.97)
\({\upsigma }_{\mathrm{e}}^{2}\)	0.25 (0.01)	0.14 (0.008)	0.05 (0.004)	0.29 (0.02)	3.46 (0.21)
\({\mathrm{h}}^{2}\)	0.19 (0.04)	0.20 (0.04)	0.35 (0.05)	0.12 (0.03)	0.36 (0.06)

dLFI = daily lactation feed intake (kg/day); dSWB (daily sow weight balance (kg/day); dLWG = daily litter weight gain (kg/day); dBFTB = daily back fat thickness balance (mm/day); SMBW = sow metabolic body weight (kg^0.75)
\({\upsigma }_{\mathrm{a}}^{2}\) = additive variance; \({\upsigma }_{\mathrm{cg}}^{2}\) = contemporary group variance; \({\upsigma }_{\mathrm{p}}^{2}\) = permanent variance; \({\upsigma }_{\mathrm{e}}^{2}\) = residual variance; \({\mathrm{h}}^{2}\) = heritability

ISSN: 1297-9686