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| What an honor! We just received a
request to use our dogs and to work with one of the top
Genetic Labs on the complicated black colors, there
being 4 or more, in connection with the English Bulldog
Breed. Of course we accepted. It may be several months,
but we will share their findings and explanations when
the study is finished. This will help all Rare Color EB
Breeders tremendously in knowing what to expect from the
matches they choose in their breeding programs. It will
also help me greatly, in accurately updating the
Official Color
Chart for English Bulldogs! |
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| These are our dogs that are being
used in the study: |
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Update: Magma has been asked to participate in the
study! |
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| UPDATES: |
| There are now 4 black colors that
we know of. |
June 2011 Update from the
Geneticist: The dominant black gene is just black,
whereas a Black Tri or Black & Tan is genetically a
sable dog with excessive black markings. So you cannot
get black tri or black & tan from a dominant black dog,
because the black will be masked. Dominant black masks,
or covers tan points. Therefore the dominant black gene
& the black tri are 2 separate genotypes. This is also
why you can have a black tri that shows no visible tan
pointed pattern, IF the white is in the spots where
normally the tan points would be. The dog looks black &
white but can be genetically tan pointed, a black tri.
Recessive black is, aesthetically, no different to
dominant black. The only difference is in the breeding -
a solid black puppy could be born from two parents who
are non-solid black if they both carry (without
expressing) one copy of the recessive black gene,
whereas a dominant black pup could only be born if one
or both of its parents are also dominant blacks. Another
important aspect of recessive black is that it is on a
different sequence of locus to dominant black. This
makes it the only way that a dog can still be solid
black if it is kk (non-solid black) on the K locus. |
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