Conversions Interbull

Conversion factors production and conformation
The breeding value of the country of origin can only be converted to the Dutch base for Black & White sires if the Interbull breeding value of a sire is not known or if a new foreign breeding value is published. In those cases the conversion is done using the conversion factors below, which have been set by Interbull.

Conversion factors production and conformation for Holstein on Black & White basis

Country Conversion factors
USA USA
Canada Canada
Germany Germany
France France
Italy Italy
Denmark, Finland & Sweden Denmark, Finland & Sweden
Great Britain Great Britain
Ireland Ireland
New Zealand New Zealand
Australia Australia
Czech Republic Czech Republic
Spain Spain
Switzerland Switzerland
South Africa South Africa
Poland Poland
Japan Japan
Hungary Hungary
Estonia Estonia

The converted breeding values for % fat, % protein and Inet are calculated using the breeding values for kg milk, kg fat and kg protein. See Calculating breeding values for % fat and % protein per basis

Conversion foreign breeding values
Foreign breed values of sires are converted by Interbull. Interbull makes the converted breeding value available to the computer centre that publishes the sire indexes in the Netherlands and Flanders.

Currently, Interbull converts breeding values for milk production traits, conformation, life span, birth traits (birth process and vitality), somatic cell count and fertility. These conversions are done for several main groups/breeds: Holstein (Black & White and Red & White), Jersey, Brown Swiss, Simmental (including Fleckvieh and Montbeliarde), Guernsey and Red Dairy Cattle (including Ayrshire and Scandinavian Red breeds). The sire indexes for the Netherlands and Flanders are used in the conversions of Holstein, Jersey, Brown Swiss, Simmental and Red Dairy Cattle. There is not enough data from the Netherlands and Flanders available for the conversion for Guernsey.

The tables displayed below show an overview for Holstein, Jersey, Brown Swiss, Simmental and Red Dairy Cattle of the countries and trait groups for which an Interbull conversion exists.

Holstein (Black & White and Red & White)

Country Prod Conf Long CE Vit SCC Fert MS Temp
Argentina
Australia
Canada
DFS(1)
Germany(2)
Estonia
Great Britain
France
Hungary
Ireland
Israel
Italy
Japan
Croatia
Latvia
Lithuania
The Netherlands/Flanders
New Zealand
Poland
Portugal
Slovenia
Slovakia
Spain
Czech Republic
Uruguay
United States
Wallonia
Switzerland
South Africa
South Korea

Jersey

Country Prod Conf Long CE Vit SCC Fert MS Temp
Australia
Canada
DFS(1)
Germany(2)
Great Britain
Ireland
Italy
The Netherlands/Flanders
New Zealand
United States
South Africa

Brown Swiss

Country Prod Conf Long CE Vit SCC Fert MS Temp
Canada
Germany(1)
France
Great Britain
Italy
The Netherlands/Flanders
New Zealand
Slovenia
United States
Switzerland

Simmental (Fleckvieh and Montbéliarde) 

Country Prod Conf Long CE Vit SCC Fert MS Temp
Germany(1)
France
Great Britain
Hungary
Ireland
Italy
Croatia
The Netherlands/Flanders
Slovenia
Slovakia
Switzerland

RDC (Red Dairy Cattle)

Country Prod Conf Long CE Vit SCC Fert MS Temp
Australia
Canada
DFS (1)
Germany
Estonia
Great Britain
Ireland
Latvia
Lithuania
The Netherlands/Flanders
New Zealand
Norway
United States
South Africa