American Fancy Rat & Mouse Association

Fancy Rat Genes, Alphabetical Name Listing

Agouti-based Colors

For more rat genetics, see the AFRMA Rat Genetics book, specific articles listed with the various standards descriptions, and the articles on the Info Pages: Breeding – Colors/GeneticsRat Genetics, part 1, Rat Genetics, part 2, Rat Genetics, part 3. See also the Rat Biology article Where do Rat Coat Colors Come From?
See the AFRMA Rat Color Standards book and the Standards pages for photos.

Go to Fancy Rat Genes, Alphabetical Name Listing for a complete list.

Go to Fancy Rat Genes, Black-based Colors,
Fancy Rat Genes, Marked Rats, or
Fancy Rat Genes, Coats & Misc.

See also Fancy Rat Genes, Genetic Code Listing for breakdowns by genetic code.

A  B  C  F  H  L  M  O  R  S  T  W

Agouti-based Colors
AgoutiAA or Aa (i.e. A–)
Agouti: ApricotA– gg pp*
(P.E. Blue Agouti)
Agouti: ChocolateA– bb
(dark Cinnamon)
Agouti: PlatinumA– bb gg* or A- amam gg (U.K.)
Albinocc (covers up the actual color/marking so can be either an agouti-based or black-based color; a.k.a. P.E. White)
AmberA– pp (P.E. Agouti) or A– mm pp (P.E. Cinnamon)
(a.k.a. a light Silver Fawn)
ApricotA– bb pp Rr? or A– mm pp Rr?
Argente CremeA– Cscs Fyfy** pp? or A– cchcch pp?
(chinchillated Silver Fawn)
Blue AgoutiA– gg*
Blue Agouti: pink-eyedA– gg pp*
(Apricot Agouti)
Burmese: AgoutiA– cech+
(similar to extreme dilute gene in mice)
Burmese: Russian Blue AgoutiA– cech+ dd
(similar to extreme dilute gene in mice)
ChinchillaA– Cscs Fyfy**? or A– cchcch? or ?
(formerly called Silver Agouti; see Breeding the Chinchilla)
CinnamonA– mm (mink agouti)
Cinnamon: redA– bb mm
Cinnamon: darkA– bb
(Chocolate Agouti)
Cinnamon: ruby-eyedA– mm Rr
Cinnamon: silveredA– mm
Cinnamon PearlA– mm Pepe
FawnA– rr or AA bb rr
(ruby-eyed Agouti; Topaz U.K.)
Himalayan: B.E. Agouti PointA– cici+
(similar to extreme dilute gene in mice)
Himalayan: Agouti PointA– chc
Lilac AgoutiA– bb mm Rr
LynxA– Cscs Fyfy rr?, A– Cscs Fyfy mm rr?, A– Ccch?, A–mm rr?, A– rr?, A– rr cchcch or ? (came out of Chinchilla breedings)
Marten: AgoutiA– cmcm#
Merle: Cinnamon PearlA– mm Me– Pepe*
OpalA– gg*
(Blue Agouti)
Russian Blue AgoutiA– dd
Russian CinnamonA– dd mm
Russian Cinnamon PearlA– dd mm Pepe
Russian FawnA– dd rr
Russian Platinum AgoutiA– bb dd gg*
Siamese: B. E. Agouti PointA– chci+
(similar to extreme dilute gene in mice)
Siamese: Agouti PointA– chch
Silver Blue AgoutiA– dd gg* or A– dd gg mm?*
Silver CinnamonA– mm
Silver FawnA– pp
(P.E. Agouti)
Silver Fawn: lightA– mm pp
(P.E. Cinnamon)
Silver Fawn: P.E. Chocolate AgoutiA– bb pp
Squirrel (U.K.)A– Cscs Fyfy** gg*? or A– gg cchcch?
(chinchillated Blue Agouti)
Topaz (U.K.)A– rr or AA bb rr
(Fawn, U.S.)
Turpin (U.K.)A– Cscs FyFy** Hro++H? or Cscs Fyfy** Hro++H? or A– cchcch HroHro++?
(chinchillated Essex)
White: black-eyedhehe or any h
(marked selected for no spots; in either agouti-based or black-based color)
Note: could also be slsl (Spotting Lethal); these suffer from aganglionic megacolon associated with white coat color, usually BEW but occasionally have small spot on head and hips and die usually within first week to 35 days after birth New!
White: pink-eyedcc (albino; covers up the actual color/marking so can be either an agouti-based or black-based color) Note: extremely diluted P.E. Self colors or a P.E. Marked with all markings bred off can look like a P.E. White

C: Albino Locus (Burmese)+ (codes by Nichole Royer)
CFull color (no dilution)
ce+Extreme dilute
chAcromelanism (Himalayan/Siamese)
ci+Intense dilute
cAlbino (Pink-Eyed White)

C: Albino Locus (Marten and Siamese Sable)# (codes by Nicole Housel)
CFull color (no dilution)
cs#Siamese Sable
chAcromelanism (Himalayan/Siamese)
cAlbino (Pink-Eyed White)

Note: Many rat colors/varieties have not been studied by geneticists so codes are given by fancy rat genetics experts or are unknown

Note: Capital letter=dominant genes unless otherwise noted; lower case letter=recessive genes

“–” means that either the dominant or recessive allele could occupy that space without affecting the outcome

* = g or Me or Dal code by Nichole Royer

** = Cscs Fyfy code by Ann Storey, N.F.R.S.

+ = ce or ci code by Nichole Royer

++ = Hro code by Sheila Sowter, N.F.R.S.

# = cm or cs code by Nicole Housel

? = genetics unknown

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Updated September 26, 2021