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INVITATION FOR BLACK COLOR STUDY 2-18-11

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 a few 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 Rare Color Chart for English Bulldogs!  

OUR BABIES INCLUDED IN THE STUDY

UPDATE JUNE 2011

Update from the Geneticist: The dominant black gene is simply black, whereas a Black Tri or Black and Tan is genetically a sable dog with excessive black markings. The Dominant Black (K) gene has two presentations on the dog, which must be visually interpreted. The two presentations are SEAL and BRINDLE. If you have black tri or black and tan that also has the SEAL part of the Dominant Black gene, you will not see the tan points as they will be hidden by the SEAL part of the dominant black gene. The dog looks black and white but can be genetically tan pointed, a black tri SEAL. The BRINDLE part of the Dominant Black gene does not do this. In fact almost the opposite. The Black Tri Gene, atat, covers the brindle on a dog except where the tan point are. Therefore the dominant black gene and the black tri are two separate genotypes.

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 that express the color. Another important aspect of recessive black is that it is on a different sequence of locus to dominant black. The only way that a dog can be solid black if it is SEAL on the K locus. The tan points on a recessive black tri will not show if the white is in the spots where normally the tan points would be. 

DNA PRIVATE COLOR STUDY FOR SABLE VS FAWN

October 3, 2015...posted on FaceBook


DNA STUDY-ENGLISH BULLDOGS PLEASE PARTICIPATE

I would like to conduct a DNA study if I can get enough people to participate. Although this is not officially sanctioned by my Genetics Lab, I will be sharing my findings with them to get their opinions. We have done this before and our findings were published by the geneticist years ago.

I am thinking that their is a difference between the DNA of a True Sable and a True Fawn. Would like to see if I am correct or not.

My thinking is that the Sable, which tends to show tri points when younger is ayat at Agouti, while the True Fawn is ayay at Agouti and never show tri points. Results from this study are that Sable EB's that show tan points and/or have dark etching, DO carry one [at] & are ayat in their dna. A TRUE Fawn will not show sable hairs, tan points,  and will be ayay in their DNA. 

From the Geneticist: Because it has not been proven, I cannot say it is impossible for an ayay (agouti) dog to show tan points, but it would be highly unlikely. 

HUGE THANKS TO ALL OUR PARTICIPANTS!

Derrek Darr-ayat

Danny Nash

Cheri Schweitzer-ayat

Jodie Weech-ayay

Jamin Smith-ayay

Jamin Smith-ayay

Kirsty Tollady-ayat

Katie Colvin Ferguson-ayat

Katie Colvin Ferguson-ayat

Mark Barnes-ayat

Lynnette Meadows-ayat

Kirsty Tollady-ayat

Steve Novy-ayat

Rod Triline-ayat

Sheri Mccormick Lewis-ayat

Sonya Wagner Ivester-ayat

Tonya Springer-Jackson-ayat

Crysral Guerrero-ayat

Tonya Springer-Jackson-ayay

Susan Mackay Pontius-ayay

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