Means Used for Calculating PTA%

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August 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	-5894	-162	-152	0.4	-0.18	2.6
Brown Swiss	-4420	-92	-81	0.2	-0.09	0.2
Guernsey	-6450	-92	-156	-9.5	0.17	0.3
Jersey	-6645	-78	-117	2.9	0.22	5.2
Milking Shorthorn	-6937	-236	-199	0.2	-0.10	5.4

PTA differences from Holstein

Breed	Milk	Fat	Protein	Productive Life	Somatic Cell Score	Daughter Pregnancy Rate
Ayrshire	-2947	-81	-76	0.2	-0.09	1.3
Brown Swiss	-2210	-46	-41	0.1	-0.05	0.1
Guernsey	-3225	-46	-78	-4.8	0.09	0.1
Jersey	-3323	-39	-58	1.4	0.11	2.6
Milking Shorthorn	-3469	-118	-100	0.1	-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	1.01	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	0.98
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	18259	706	576	30.1	2.71	22.7
Brown Swiss	22093	884	732	28.9	2.74	19.4
Guernsey	17157	757	558	25.9	3.33	19.4
Holstein	26081	953	784	28.1	2.76	22.6
Jersey	18458	846	657	31.5	3.07	26.6
Milking Shorthorn	16839	622	521	28.6	3.05	24.8

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)