Table 2.

Variance of the intercept $\left({\sigma }_{a_0}^2\right)$, variance of the slope $\left({\sigma }_{a_1}^2\right)$, covariance between the intercept and slope $\left({\sigma }_{a_0{a}_1}\right)$, permanent environmental variance $\left({\sigma }_{pe}^2\right)$, variance of herd-year effects $\left({\sigma }_{hy}^2\right)$, residual variance $\left({\sigma }_{hy}^2\right)$ and correlation between the intercept and slope $\left(r_{a_0{a}_1}\right)$, with their standard errors in parentheses estimated using an RNM

Trait	A|H	${\sigma }_{a_0}^2$	${\sigma }_{a_1}^2$	${\sigma }_{a_0{a}_1}$	${\sigma }_{pe}^2$	${\sigma }_{hy}^2$	${\sigma }_e^2$	$r_{a_0{a}_1}$
AIS	A	0.083 (0.025)	0.046 (0.009)	−0.054 (0.015)	0.052 (0.003)	0.052 (0.003)	1.40 (0.003)	−0.880 (0.030)
	H	0.076 (0.024)	0.044 (0.009)	−0.050 (0.014)	0.052 (0.003)	0.010 (0.0005)	1.40 (0.003)	−0.871 (0.033)
ICF	A	92.0 (15.8)	0.015 (0.003)	−0.849 (0.193)	53.3 (2.05)	38.7 (0.930)	728.1 (1.70)	−0.724 (0.047)
	H	95.5 (15.9)	0.016 (0.003)	−0.883 (0.195)	52.1 (2.10)	38.7 (0.929)	728.2 (1.70)	−0.725 (0.046)
IFL	A	48.0 (22.0)	0.052 (0.011)	−0.621 (0.462)	168.2 (7.76)	18.3 (1.03)	3383.1 (8.03)	−0.395 (0.178)
	H	44.7 (21.3)	0.050 (0.011)	−0.535 (0.446)	166.6 (7.85)	18.3 (1.03)	3383.9 (8.03)	−0.360 (0.192)
NRR	A	0.006 (0.002)	0.009 (0.005)	−0.005 (0.003)	0.004 (0.0004)	0.001 (0.00007)	0.235 (0.0005)	−0.709 (0.116)
	H	0.005 (0.0017)	0.009 (0.005)	−0.005 (0.003)	0.004 (0.0004)	0.001 (0.00007)	0.235 (0.0005)	−0.690 (0.122)

AIS number of inseminations per conception, ICF interval from calving to first insemination, IFL interval from first to last insemination, NRR non-return rate at 56 days after first insemination, A and H pedigree-based and pedigree-genomic combined matrices, respectively