Australian Terrier Breed Magazine - Showsight

“...ONE OF THE MOST ENJOYABLE ASPECTS OF DOG BREEDING IS CONTINUING TO STUDY AND LEARN...”

the Norwegian Elkhound or the Schnauzers.

5. The E series:The black mask is created by Em. The next mem- ber E allows the dark (black or brown) pigment evenly over the coat. The bottom member e leaves clear and evenly distrib- uted red or yellow (no dark pig- ment) such as in Irish Setters or orange Pomeranians. There is also an e br (brindle) which in the presence of ay (clear sable or tan) or at (bicolor varieties) produces brindle dogs, with bands of dark pigment on tan or yellow, such as in Scotties, Box- ers, Irish Wolfhounds. This series is interesting in its interaction with the A series as described above. Another con- cept worthy of additional analy- sis is that breeds that are some- what similar in color may be a product of completely different combinations of genes creating that color. 6. The G-g pair: The G gene is partly dominant and changes a uniformly dark puppy toward grayness or a paler shade, and is found in Kerry Blues, Yorkies and Poodles. Dogs that are gg do not lighten. This pair is dif- ferent from d which creates blue Danes or Weimaraners. 7. The M-m pair: The M gene cre- ates merle or dapple, with light- er or blue eye pigment and can create deformities. 8. The P-p pair: Most dogs are P but in pp animals, the dark is greatly

reduced, called “pink-eyed dilu- tion” leaving pale blue or light yellow fawn and is very rare. 9. The S series: The S creates a sol- id color, with little or no white markings (perhaps a spot on the toes or chest.) The next in the series is s i, known as Irish spot- ting as in the Basenji or Boston Terrier. The sp creates piebald spotting as in the Beagle. The series continues to the sw allele which is extreme piebald as in the Bull Terrier or Sealyham Ter- rier, mostly white with perhaps a spot on the face, ears or tail. 10. The T-t pair: The dominant T gene creates white flecks or ticking. There is some discus- sion of a possible separate locus R for Roan, a mixture of colored and white hair. When thinking about these series and pairs of genes in relation to Austra- lian Terriers, I feel that I, for one, have a lot more to learn and consider in breed- ing Aussies, when trying to breed for correct color in addition to all the other attributes required by the Standard. But one of the most enjoyable aspects of dog breeding is continuing to study and learn, no matter how many years of experience you may have. The Austra- lian Terrier is well worth this effort and I hope to spend many more years enjoy- ing our wonderful breed.

A possible fifth is the as allele which is a saddle pattern. Puppies are born darker overall in this pattern and then to the saddle pattern, as in the Airedale or Welsh Terrier. This series appears to describe the production and appearance of the Aus- sie coat, both in the Blue-tan and the sandy/red, based on some of the breeds Mr. Little studied and mapped out, such as the Airedale, Welsh, Norwich, Irish and Yorkshire Terriers. 2. The B – b pair: B produces black and b reduces the pigment and produces liver or chocolate. 3. The C series: C controls the

full depth of pigmentation as observed in golden brindles, dark tans or reds, or deep blacks or livers. The c ch is called chin- chilla and reduces red-yellow so that the black or dark pigment is most obvious and the light back- ground much less intense, as in the Norwegian Elkhound.

There are other possible alleles in this series which can create albinism or extreme dilution. 4. The D – d pair: the D creates

the intensely pigmented dogs and the d causes Blue dilution. Most breeds are D, intensely pigmented. The d gene called the Maltese (as in a cat) or blue dilution creates blue in many shorthaired breeds such as blue Great Danes or Dobermans, as well as blue Chows or Poodles.

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S HOW S IGHT M AGAZINE , J ULY 2017 • 245

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