TABLE 2.

Genetic parameters derived from real data and used in the simulation.

Dairy goats (Atlantic)	DMY (kg/day)	Long (days)	KA (months)	Mast (0/1)	Resilience (kg/°C/day)	Stability Abs (kg/°C/day)
Genetic
DMY	0.370*	0.276*	−0.127*	0.495*	0.032	0.422*
Long		11,282*	−0.003	−0.429*	−0.109	−0.119
KA			2.72*	0.075	0.112	−0.033
Mast				0.002*	0.067	0.253
Resilience					0.0002*	–
Resilience Abs						0.0001*
Residual
DMY	0.570*	0.118*	0.109*	−0.076*	0.009	0.088*
Long		101,850*	0.0144	−0.074*	0.078*	−0.011
KA			5.880*	0.035*	0.043*	0.052*
Mast				0.122*	0.012	0.017*
Resilience					0.002*	–
Stability Abs						0.001*
Accuracy	0.62	0.51	0.60	0.40	0.51	0.51
Dairy sheep (Mediterranean)	DMY (kg/day)	DFY (g/day)	DPY (g/day)	Fert (%)	Resilience (g/°C/day)	Stability+ Abs (g/°C/day)
Genetic
DMY	0.051	0.687	0.724	−0.118	−0.158	−0.158
DFY		128.03	0.914	−0.183	−0.126	−0.126
DPY			82.523	−0.169	−0.111	−0.111
Fert				0.501	0.175	0.175
Resilience					0.020	–
Residual
DMY	0.204	–	–	–	–	0.020
DFY		405.4	–	–	–	–
DPY			192.6	–	–	–
Fert				2.836	–	–
Resilience					0.381	0.381
Accuracy	0.60	0.60	0.65	0.35	0.50	0.50

Genetic/residual variances (diagonal), correlations (above diagonal), and accuracies shown.

DMY, daily milk yield (kg/day); DFY, daily fat yield (g/day); DPY, daily protein yield (g/day); Fert, fertility (%); Long, length of productive life (days); KA, age at first kidding (months); Mast, mastitis (0/1); Resilience, resilience trait, being slope of decay of milk yield on temperature (kg/day/°C) in dairy goats and slope of decay of protein yield over 22° (g/°C/day) in dairy sheep.

*For dairy goats, significantly different from 0 (p < 0.05). Non-significant values were zeroed for simulation.

⁺For dairy sheep breed, the genetic parameters for the absolute value of resilience (stability) were the same as for the raw value of the slope.