the gene/allele that makes a dog blue dilutes the black and red (which is genetically considered a regular fawn - which can be from deep mahagony to a light creamy fawn) pigment of a dog. if the dog is black it will be diluted to blue. if the dog is red both the visible red and black pigment is diluted and we get what is often called issabella (I call it blue fawn). what color is the mask on an issabella dog? it is always blue! have you ever seen a red dog with a blue mask? no because red dogs have black mask and yes because issabellas are diluted reds and have blue mask.
silver blue, dark blue, issabella/blue fawn are all a result of the dd (dilute) genotype. anytime you breed any of these colors WITH ONE ANOTHER YOU CAN ONLY GET any of these variations of BLUE. If you breed them to a non dilute such as black or red you can expect colors other than blue.
some of the color genetics for the Sharpei can be used - but that color breeding chart is not based on genetics. also there are accepted colors in the sharpei(chocolate or anything with a nose other than black or blue) that are not standard colors in the Thai Ridgeback.
the key point is blue x blue ( blue x issabella , silver blue x blue or issabella, or any combination of any of these dilutes) can only give you blue/issabella/silver blue offspring.
and so i ask the question again:
has anyone ever had or know of a blue x blue pairing that has produced a color other than blue, silver blue or issabella(blue fawn)?
i just thought of a fun way to remember this bit of canine coat color genetics: blue x blue always breeds true!
James ... www.ManapeThaiRidgeback.com |
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