Table 1. Phenotypic, inbreeding and heterosis statistics for Holstein and Jersey milk, fat, and protein yields, productive life (PL), daughter pregnancy rate (DPR), somatic cell score (SCS), fat percent (fat%) and protein percent (protern%) based on genotyped cows.

Trait			Milk (kg)	Fat (kg)	Protein (kg)	PL (months)	DPR (%)	SCS	fat%	protein%
HO	Phenotype	Na	30,482	30,482	30,482	14,780	23,811	30,352	30,482	30,482
		Mean	10,857	388	337	42.1	24.4	2.77	−0.001	0.061
		SDb	1,635	63	46	22.3	17	1.47	0.206	0.087
	inbreeding	Mean	5.66	5.66	5.66	5.53	5.61	5.66	5.66	5.66
		SD	1.65	1.65	1.65	1.67	1.63	1.65	1.65	1.65
		regCoffc	−66.12	−2.47	−1.96	−0.268	−0.072	0.004	−	−
	Heterosis	Mean	0.0014	0.0014	0.0014	0.0022	0.0016	0.0014	0.0014	0.0014
		SD	0.0284	0.0284	0.0284	0.0377	0.0308	0.0285	0.0284	0.0284
		regCoff	172.23	22.12	11.29	0.349	1.973	0.019	−	−
JE	Phenotype	N	8,321	8,321	8,321	5,492	7,422	8,292	8,321	8,321
		Mean	8,284	374	302	49.4	30.9	3.08	0.015	0.06
		SD	1,434	63	46	22.6	16.5	1.41	0.289	0.127
	inbreeding	Mean	6.63	6.63	6.63	6.66	6.66	6.64	6.63	6.63
		SD	2.92	2.92	2.92	2.98	2.95	2.92	2.92	2.92
		regCoff	−66.12	−2.47	−1.96	−0.268	−0.072	0.004	−	−
	Heterosis	Mean	0.0112	0.0112	0.0112	0.0127	0.0121	0.0109	0.0112	0.0112
		SD	0.0884	0.0884	0.0884	0.0961	0.0929	0.0865	0.0884	0.0884
		regCoff	172.23	22.12	11.29	0.349	1.973	0.019	−	−

^aNumber of records, ^bSD = Standard deviation, ^cregCoff was the regression coefficient for inbreeding or heterosis, which was estimated based on a multiple-trait and multiple-breed linear mixed model.