Goat genetics, Purebred, Silky chickens & color genetics, Dominance, Dominance Codominance and Epistasis

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SOME DAIRY GOAT COLOR GENETICS by Wilmer J. Miller

The scientific name of the domestic dairy goat is Capra hircus (aegagrus). It has 30 pairs of chromosomes; that is, 2n = 60.

The wild ancestor is the bezoar, also called the Pesang or Pasang. the range of the bezoar originally was from the Balkans through the Near East to the Indus valley. Some breeds of India are thought to have some ancestral contribution from the markhor, C. falconeri. In Africa the Abyssinian ibex, C. ibex, likewise is thought to have contributed genetic material to the domestic goat.

Domestic Breed Groups:

Usual Colors

Alpine

Black and white

Balkan

Gray, brown or red

Syrian

Black or piebald

After

Searle

1968

Nubian

Red, brown, black, blue-gray or white

Kurdish

Black, but Angoras are white

Central Asiatic Down

White

Indian

Black

Dwarf

Black or white

Main color loci in mammals and variants in goats:*

(linkage group in Mice)

V

VIII

I

II

XVIII

I

A locus

B locus

C locus

D locus

E locus

P Locus

Red

Wild (black)

Wild

Wild

Black

Wild

Badger face

Brown

(intense)

Wild

(black belly)

Light brown

red (solid red

Wild

Chinchilla

no pattern)

Gray

Cremello-like dilution

black and tan

Single gene dose

Black and tan

(heterozygote)

(with black belly)

Red to yellow

Red cheek

(homozygote)

Mantled

Red and black to cream

Reverse mantled

Black

Additional:

Roan: a partial dominant; the homozygote is white
Frosted: muzzle and ears whitened, a dominant
Spotted: belted is a dominant
Mosaic spotting is of unknown inheritance
Speckling: in white areas is probably dominant

* Adapted from Searle (1968) and especially Dr. D. P. Sponenberg's Seminar for the American Minor Breeds Conservancy, Annual Meeting and Conference, 28 Sept. 85, Wichita, Kansas.

 Goat genetics, Purebred, Silky chickens & color genetics, Dominance, Dominance Codominance and Epistasis

Wilmer's main page