Color Codes in Fjords

While our primary goals in the breeding program are focusing on conformation, disposition, usability and versatility, the color genetics in Norwegian Fjordhorses are very fascinating and always subject of lot of questions.

All Fjord horses carry the DUN gene and are displayed in 5 accepted and 1 discouraged color. The genes that are responsible for color are (A) bay/brown - limits black pigments to the points , (aa) grey - black allowed through the coat, (E) allows black pigment, (ee) red - does not allow black pigment, and (Ccr) cremello.
While (A) and (Ccr) are dominant, (aa) and (ee) are recessive genes, but all genes are independent on one another. Nonetheless, e and a need both parts of the recessive gene to become visible. ee removes ALL black hairs and can even mask a grey dun.

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Brown Duns

AA EE - brown with black limited to the points (legs, head, ears etc.)
Aa EE - brown with black limited to the points and grey recessive
AA Ee - brown with black limited to the points and red recessive

All horses with these gene combinations are displayed as Brown Duns
       A+E+ is always a dominant brown with black limited to the points 

Red Duns

AA ee - brown with no black points
Aa ee - brown with no black points but grey recessive
aa ee - two recessive genes with NO black points

All horses with these gene combinations are displayed as Red Duns
        ee does not allow any black, even in combination with aa (full grey) 

Grey dun

aa EE - grey gene with black points
aa Ee - grey gene with black points and red recessive
aa EE Ccr - grey gene with black points and cremello*

All horses with these gene combinations are displayed as Grey duns
       aa always needs to be in combination with E+ to be displayed grey, otherwise it will be red 

White duns

AA EE Ccr - Ccr is dominant and will display as white

 Aa EE Ccr - Ccr is dominant and will display as white, grey recessive
AA Ee Ccr - Ccr is dominant and will display as white, red recessive
 

All horses with these gene combinations are displayed as White duns
        a and e can apply as recessive 

Yellow Duns

AA ee Ccr - Ccr is dominant and in combination with ee 

                         (NO black hairs) will displayed as yellow
                          (white and red at the same time)
Aa ee Ccr - Ccr is dominant and in combination with ee 

                          (NO black hairs) will displayed as yellow
                          (white and red at the same time), grey recessive
aa ee Ccr - Ccr is dominant and in combination with ee 

                          (NO black hairs) will displayed as yellow
                                  ee limits the grey from aa.

 All horses with these gene combinations are displayed as Yellow duns
       It is a combination of A+ or aa ee with Ccr, white and red at the same time

Kvit (not desired!)

 A Kvit is a combination of two sets of the (cr) cremello gene shown as (crcr).
 A crcr can occur when breeding a white dun to a white dun, because cr is dominant. 

Special combination

 aa EE Ccr - grey gene with black points and cremello* 


 It is a white dun and grey dun at the same time, the cremello gene can not lighten the grey coat color completely.
The horse will appear as a light grey, but can pass on the cremello gene to every offspring. Could produce a Kvit bred to a white dun Fjord.


Color test

Color tests can be done through University of California, Davis.

This only provides information about the color genetics of Norwegian Fjord horse in combination of their appearance.  I like to privately study color genetics in combination with different conformational styles and characteristics and I am happy to talk and provide information about this via email and/or phone.

DHF Lilly

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Aa EE
Brown Dun
Grey recessive

Brunblakk    

Lillian

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 AA ee
Red Dun
no recessive

Rødblakk

Tsjalle

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 aa Ee
Grey Dun
Red recessive

Grå

OFI Siljar

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Aa EE Ccr
White Dun
Grey recessive

Ulsblakk

Arwen

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AA ee Ccr
Yellow Dun
full red

Gulblakk