A Brief Insight into Amstaff Coat Colours!!

Black (K) The dog will be KB and will not have any red in its coat at all.  KB is dominant black, there is also kbr - brindle and k - recessive black.   k - recessive black will allow the A locus to show through. Ky allows the A locus to show without brindling.
Seal Seal is when the A locus 'shows through' on a dominant black dog and thought to be ea faulty K locus.
Brindle (kbr) Brindle is one of the recessive genes on the K Locus.  Brindle typically is black stripes on a red base.  The black stripes can be affected by the dilution gene (blue) and liver gene (isabella), greying, merle and recessive red.  The brindle stripes can be of a varying thickness hence names as Black Brindle, Red Brindle, Tiger Brindle etc.  All solid brindle dogs are Red within the varying shades.  A tan pointed dog with the brindle gene will turn the tan points to brindle points.
Red, Fawn and varying shades  (A locus)

Red/ Sable happens on the A Locus.  Ay is sable (Clear, tipped and shaded), at is tan points, aw is agouti (wolf patterns not seen in Amstaffs) and a which is recessive black, the a gene allows a non dominant black dog to be black.  Recessive red ee is rare but can happen.

Clear Sable is typically a red dog with minimal if any black, liver, isabella, blue  hairs.  If we add the black mask gene to a clear sable we would typically call them fawn.

Tipped Sable is red dogs with black, liver, isabella, blue hairs throughout the coat.

Shaded Sables are red dogs with lots of brown and black hairs normally over the head, ears, back.  Widow's Peak on the forehead is a typical pattern seen with a shaded sable.

For a dog to exhibit tan points they must be atat and inherit one copy from each parent.  Tan points are quiet restrictive on where the markings are situated on the dogs, usually pips above the eyes, sidees of the muzzle extending to the cheeks, pips on the cheeks, front of the neck below the head, patches on the forechest and lower legs (and inside legs), feet and patch underneath the tail. The base colour is black or liver with or without the dilution gene.

Recessive red (ee) is near impossible to see with the naked eye.  The dog will not have any black, liver, blue or isabella hairs throughout its coat at all.  It will have normal black pigment however.  The problem with recessive red is it dominant over all other locii and as such will mask if a dog carries dominant black, merle, tan points, dilution, thus creating the danger of doubling up on undesired locii (double merle) without testing. A clear unmasked sable can also appear as a recessive red, hence why colour testing is important.

Blue, Blue Fawn, Blue Brindle, Isabella (lilac)      (D Locus)

The dilution gene turns all black to blue, liver to isabella.  

DD dogs are not dilutes and do not carry the dilution gene and cannot pass it on.

Dd dogs are not dilutes but they do carry the dilution gene and may pass it on.

dd dogs are dilute colours and can only pass on the dilute gene.

In order for dilution to be expressed both parents must either be carriers or dilutes themselves to pass on the dilution gene to offspring.

A blue dog is typically a black dog with the dilution gene.

Blue fawn dog is typically a red dog with the dilution gene.

Blue brindle dog is typically a blue fawn with the brindle gene.

Isabella is a liver dog with the dilution gene.

Colour Dilution Alopecia (CDA) is in fact the result of a faulty version of the d allele know as d1.  It is not common however more and more seem to be popping up in Amstaffs.

Tri Colour A tri colour is a tan pointed dog with white markings.  If the dog carries the brindle gene it will turn the points to brindle instead of tan.
Other genes commonly seen.

Em - Black Mask (if dilution gene in play, mask with be blue)

S Locus - White markings, dogs.  White is the lack of pigment. S = no white, sp = piebald (in varying degrees).  Small white patches typically seen in the chest, neck feet and toes are Ssp. The piebald gene is responsible for the white markings we commonly see. Pied (spsp) is a white dog with colour patches.  Extreme white sw has shown to be spsp but the cause of the complete lack of colour is not known as yet.  Due to the lack of colour on the head and ears area, deafness is one problem that has been linked to extreme white due to no pigment in certain areas of the inner ear.


Our colour tested dogs and their results!

Ch. Havfun Bad Habit

Blue

Sire - Blue | Dam - Black

When Stitch was tested the A Locus was not available.

K/kbr/BB/dd/EE/Em/Em 

Ch. Tigerboy Sasha

Blue Brindle

Sire - Blue | Dam - Blue

When Karma was tested the A Locus was not available.

k/kbr/BB/dd/EE/Em/Em

Karma's first and second tests came back as non dilute Dd however from coat colour and pigment we know she is a dilute and obviously there was a issue with the testing.

Ch. Staffwild Uptown Funk

Red

Sire - Red | Dam - Blue

ky/ky/ay/ay/BB/Dd/EE/Em/Em

Staffwild Licence To Thrill

Brindle

Sire - Brindle | Dam - Blue

KB/Kbr/ay/ay/BB/Dd/EE/Em/Em

 

Ch. Staffwild Super Overdrive

Blue Brindle

Sire - Brindle | Dam - Blue

KB/Kbr/ay/ay/BB/dd/Ee/Em/En

 

Ch. Staffwild Its Electric

Blue

Sire - Blue | Dam - Blue Brindle

KB/Kbr/ay/ay/BB/dd/EE/Em/Em

 

Ch. Staffwild Iron Horse

Blue

Sire - Blue | Dam - Blue Brindle

When Odin was tested the A Locus was not available.

K/kbr/BB/dd/EE/Em/Em

 

 

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