Table 3. Holstein and Jersey estimated variance components and heritabilities for milk, fat, and protein yields, productive life (PL), daughter pregnancy rate (DPR), somatic cell score (SCS), fat percent (fat%) and protein percent (protein%) using four different models.

Breed	Modela	Varb	Milk (kg2)	Fat (kg2)	Protein (kg2)	PL (months2)	DPR (%2)	SCS	Fat %	protein%
HO	MA		762,478	1,002	449	21.2	16.1	0.19	0.021	0.0038
			1,885,769	2,961	1,579	476.6	273.3	1.98	0.023	0.0039
			0.288	0.253	0.221	0.043	0.056	0.087	0.468	0.492
	MAD		712,905	920	409	21.1	16.6	0.18	0.02	0.0038
			134,815	200	108	0.24	0.001	0.02	0.0005	0.0001
			1,788,979	2,824	1,501	476.4	274.6	1.96	0.023	0.0039
			0.27	0.233	0.202	0.042	0.057	0.084	0.464	0.487
			0.051	0.051	0.053	0	0	0.01	0.011	0.013
	MAD2		750,379	985	437	20.9	16.1	0.19	0.021	0.0038
			96,834	136	79	2.4	0.002	0.02	0.0003	0.00006
			1,787,699	2,827	1,499	474.4	274.1	1.96	0.023	0.0039
			0.285	0.25	0.217	0.042	0.056	0.087	0.468	0.492
			0.037	0.034	0.039	0.005	0	0.01	0.006	0.008
	MAD3		831,607	999	548	–	–	–	–	–
			92,019	118	73	–	–	–	–	–
			1,848,844	2,925	1,543	–	–	–	–	–
			2,218,018	3,332	1,778	–	–	–	–	–
			2,950,420	3,840	2,328	–	–	–	–	–
			0.215	0.202	0.186	–	–	–	–	–
			0.024	0.024	0.025	–	–	–	–	–
JE	MA		735,064	869	552	36.3	9.3	0.21	0.045	0.009
			1,354,587	3,050	1,585	477.9	263.6	1.82	0.038	0.0068
			0.352	0.222	0.258	0.071	0.034	0.102	0.542	0.567
	MAD		668,822	747	490	29.2	8.1	0.2	0.044	0.0088
			144,809	279	149	19.6	3.2	0.02	0.0007	0.0005
			1,262,034	2,871	1,488	465	261.5	1.8	0.037	0.0065
			0.322	0.192	0.23	0.057	0.03	0.098	0.54	0.556
			0.07	0.072	0.07	0.038	0.012	0.012	0.009	0.03
	MAD2		713,008	834	534	35.8	9.3	0.21	0.045	0.0089
			112,263	215	119	12.2	0.1	0.02	0.0005	0.0003
			1,250,286	2,849	1,473	466.2	263.5	1.8	0.037	0.0065
			0.344	0.214	0.251	0.07	0.034	0.102	0.543	0.567
			0.054	0.055	0.056	0.024	4E-04	0.01	0.006	0.020
	MAD3		827,677	955	618	–	–	–	–	–
			157,350	306	161	–	–	–	–	–
			1,307,028	2,919	1,537	–	–	–	–	–
			1,848,349	3,826	2,051	–	–	–	–	–
			2,068,021	3,985	2,217	–	–	–	–	–
			0.271	0.182	0.206	–	–	–	–	–
			0.052	0.058	0.054	–	–	–	–	–

HO = Holstein; JE = Jersey.

^aMA = only additive effects included; MAD = additive and dominance (values) effects included; MAD2 = additive and dominance (deviations) effects included; and MAD3 = additive and dominance effects included as well as cows with genotype probabilities derived using genotyped ancestors.

^bVar = variance components;  = additive variance,  = dominance variance,  = residual variance for MAD,  = residual variance for MAD2,  = residual variance for genotyped cows,  = residual variance for cows with genotype probabilities derived from genotyped sire and dam,  = residual variance for MAD3,  = additive heritability, and  = dominance heritability.