. 2019 Sep 3;97(9):3658–3668. doi: 10.1093/jas/skz244

Table 1.

Estimated variance components and heritability of lesions in different regions of the body of pigs at the finisher stage 24 h postmixing as estimated by 6 models (SE in parentheses)¹

Model	Covariate	Trait	${\hat{σ}}_{d}^{2}$	${\hat{σ}}_{s}^{2}$	${\hat{σ}}_{d s}$	${\hat{σ}}_{pen}^{2}$	${\hat{σ}}_{e}^{2}$	${\hat{h}}_{D}^{2}$
DGE	*t_RF*	Anterior	0.059 (0.017)			0.033 (0.010)	0.21 (0.015)	0.19 (0.055)
		Central	0.014 (0.09)			0.051 (0.013)	0.20 (0.009)	0.05 (0.035)
		Caudal	0.028 (0.015)			0.081 (0.020)	0.28 (0.018)	0.073 (0.03)
DGE	*t_AT*	Anterior	0.11 (0.028)			0.026 (0.010)	0.27 (0.022)	0.28 (0.063)
		Central	0.037 (0.015)			0.06 (0.016)	0.23 (0.016)	0.11 (0.044)
		Caudal	0.039 (0.018)			0.092 (0.023)	0.30 (0.020)	0.091 (0.04)
TSGE	*t_RF*	Anterior	0.057 (0.010)	0.025^NS (0.012)	−0.0004^NS (0.015)	0.001 (0.011)	0.21 (0.014)	0.20 (0.036)
		Central	0.015 (0.0075)	0.032 ^NS (0.013)	0.0007 ^NS (0.011)	0.016 (0.013)	0.20 (0.012)	0.064 (0.031)
		Caudal	0.033 (0.013)	0.041 ^NS (0.020)	0.016 ^NS (0.017)	0.034 (0.021)	0.27 (0.017)	0.096 (0.038)
TSGE	*t_AT*	Anterior	0.10 (0.017)	0.030 ^NS (0.017)	−0.026 ^NS (0.029)	0.007 (0.016)	0.26 (0.021)	0.28 (0.044)
		Central	0.033 (0.010)	0.020 ^NS (0.016)	−0.008 ^NS (0.015)	0.045 (0.018)	0.23 (0.015)	0.10 (0.034)
		Caudal	0.037 (0.016)	0.038 ^NS (0.023)	0.0019 ^NS (0.020)	0.057 (0.025)	0.30 (0.020)	0.09 (0.040)
ISGE-Reciprocal Fights	*t_RF*	Anterior	0.084 (0.008)	0.040* (0.013)	0.051* (0.010)	0.026 (0.013)	0.18 (0.013)	0.29 (0.031)
		Central	0.019 (0.007)	0.023* (0.011)	0.015* (0.007)	0.044 (0.014)	0.19 (0.012)	0.075 (0.027)
		Caudal	0.037 (0.011)	0.064* (0.019)	0.040* (0.011)	0.047 (0.019)	0.24 (0.016)	0.11 (0.035)
ISGE-Attacks	*t_AT*	Anterior	0.155 (0.014)	0.051* (0.017)	0.077* (0.015)	0.020 (0.014)	0.22 (0.017)	0.38 (0.037)
		Central	0.051 (0.009)	0.048* (0.016)	0.036* (0.010)	0.042 (0.016)	0.20 (0.014)	0.17 (0.032)
		Caudal	0.049 (0.014)	0.068* (0.021)	0.031* (0.014)	0.057 (0.021)	0.26 (0.018)	0.13 (0.038)

*P < 0.01, ^NSP > 0.5.

1 ${\hat{σ}}_{d}^{2}$ direct genetic variance, ${\hat{σ}}_{s}^{2}$ social genetic variance, ${\hat{σ}}_{d s}$ covariance genetic direct-social, ${\hat{σ}}_{pen}^{2}$ pen variance, ${\hat{σ}}_{e}^{2}$ , error variance, ${\hat{h}}_{D}^{2}$ , heritability. DGE: direct genetic additive model, TSGE: traditional social genetic effect model, ISGE-Reciprocal Fights: Intensity-based social genetic effect model with Reciprocal Fight behavior, ISGE-Attacks: Intensity-based social genetic effect model with Attack and Single Bite behaviors. t_RF: total time that the animal spent engaged in reciprocal fight behavior, t_AT: total time that the animal spent engaged in attack behavior.