Means Used for Calculating PTA%

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January 2010 across breed base adjustment parameters

Breeding value (2*PTA) differences from Holstein

Breed	Milk	Fat	Protein	Productive Life	Somatic Cell Score	Daughter Pregnancy Rate
Ayrshire	-5960	-164	-154	0.4	-0.17	2.6
Brown Swiss	-4412	-91	-81	0.4	-0.09	0.2
Guernsey	-6529	-95	-158	-9.4	0.16	0.2
Jersey	-6700	-78	-116	3.0	0.22	5.3
Milking Shorthorn	-7051	-240	-202	0.5	-0.10	5.4

PTA differences from Holstein

Breed	Milk	Fat	Protein	Productive Life	Somatic Cell Score	Daughter Pregnancy Rate
Ayrshire	-2980	-82	-77	0.2	-0.08	1.3
Brown Swiss	-2206	-46	-40	0.2	-0.05	0.1
Guernsey	-3264	-47	-79	-4.7	0.08	0.1
Jersey	-3350	-39	-58	1.5	0.11	2.6
Milking Shorthorn	-3525	-120	-101	0.2	-0.05	2.7

Standard deviation ratio

Breed	Milk	Fat	Protein	Productive Life	Somatic Cell Score	Daughter Pregnancy Rate
Ayrshire	0.80	0.80	0.80	1.00	1.00	0.94
Brown Swiss	0.92	0.92	0.92	1.00	0.94	1.01
Guernsey	0.90	0.90	0.90	1.00	1.05	0.99
Holstein	1.00	1.00	1.00	1.00	1.00	1.00
Jersey	0.89	0.89	0.89	1.00	0.90	0.94
Milking Shorthorn	0.75	0.75	0.75	1.00	0.93	0.93

Trait means for base cows

Breed	Milk	Fat	Protein	Productive Life	Somatic Cell Score	Daughter Pregnancy Rate
Ayrshire	18258	706	576	30.0	2.71	22.9
Brown Swiss	22095	884	732	29.1	2.74	19.5
Guernsey	17137	757	558	26.5	3.33	19.5
Holstein	26082	953	784	28.7	2.76	22.6
Jersey	18460	846	657	31.4	3.07	26.7
Milking Shorthorn	16842	622	522	29.0	3.05	24.9

Heterosis value

Milk	Fat	Protein	Productive Life	Somatic Cell Score	Daughter Pregnancy Rate
452	26	18	0.0	0.10	1.5

Inbreeding Regression

Milk	Fat	Protein	Productive Life	Somatic Cell Score	Daughter Pregnancy Rate
-65.3	-2.372	-2.145	-0.22	0.003	-0.078

Base Cow Expected Future Inbreeding (EFI)