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