The Agouti, A gene, is a modifier gene of the B gene. This gene dictates the pattern of the color on the fiber. This is the gene that decides what pigment goes where. There are many alleles at this locus.
- Awt white tan
- Ab badger face
- At black and tan/ mufflon
- A+ wild type
- Ag Grey
- Agt Grey and tan
- Abl blue
- Albl light blue
- Aeb English blue
- Albf light badger face
- Alg light grey
- Agg gotland grey
- Asm swiss markings
- Als Lateral Stripes
- Aep eye patch
- Aa solid / nonAgouti
The Agouti gene shows that alleles are only dominate and recessive in comparison to other alleles. The Awt gene is dominate to all other alleles while the Aa is recessive to all other alleles. The other middle alleles exercise co-dominance within each other.
This gene controls which pigment is produced
- Eumelanin= black
- Pheomelanin= tan
- Amounts of pheomelanin produces the ranges of tan (dark brown- light pale)
hi
what is the evidence for the Agg allele?
cheers! Polly
Dr. Polly Matzinger
President Gotland Sheep Breeders of North America
Hi,
Here is the resource I got That from, as well as the resource that is sited pertaining to Agg.
https://u.osu.edu/tuniscolorgenes/files/2015/08/fat-tailed-color-genetics-132ag1z.pdf
Adalsteinsson, S., 1978. Breeding of Piebald Sheep with Undercoat Spots.
Rádunautafundur, 209. (in Icelandic) [cited by Adalsteinsson, 1984].
Hope this clears things up!