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April 9, 2011


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Genetics: New KIT mutations, and a new PAX3 gene

Journal Entry: Sat Apr 9, 2011, 8:11 PM
Professional Equine ArtFree Line Art and Stock ArtArticles on Animal GeneticsCheshire Farms the Horse Art Stable

And thank you for stopping by. My name is Jacqueline, and I've been actively researching various Animal Color Genetics since High School (don't ask me to count the years). Primarily I've been involved with Equine Coat Color genetics, but recently got involved with Canine and Rodent Color as well.

Due to individual typing, we create our own unique structure for a genotype. This can get confusing for some, specifically when we use different letters and symbols, and sometimes this can result in a misrepresentation of a color. This is not my intention, and I apologize ahead of time if things become skewed. I have written "Starting Points" for each species, which will hopefully make it easier for you to read.

Update May 16, 2012:…

Update January 17, 2013: UC Davis now has an official test for the Leopard Complex!…

Update September 2, 2012: The gene for Pacing in horses has been identified

Update May 29, 2012: A pure PRE mare has tested for Silver…

Updated January 15, 2012: Nearly 10 months after I put out the article on Blue Eyes in horses, UC Davis has released that they have discovered 3 mutations of Splashed White, and now have a test for it.…

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Genetic Topics

Horses… Universal HARPG Color Codes: Part I  - Feb 20, 2010… Universal HARPG Color Codes: Part 2 (The Cream Gene) - Mar 23, 2010… Universal HARPG Color Codes: Part 3 (The Pearl Gene) - Mar 29, 2010… Color Inheritance in a Nutshell for the HARPG - Feb 14, 2010… How to Decipher the Color Calculator for the HARPG - Feb 11, 2010… Blue Eyes in Horses - April 9, 2011

These entries are all old and I haven't gone threw them in a long time, so I'm not sure what is out dated
Chapter 1 : Basic Colors
Chapter 2 : Dilution Genes
Chapter 3 : Color Modifiers
Chapter 4 : White Patterns
Chapter 5 : What's the confusion? : Chestnut Vs. Sorrel
Chapter 6 : The Confusion Over 'Brown'

These were accidentally deleted and I'm slowly getting things together to hopefully have them up again.
Color Terminology 1 : Black
Color Terminology 2 : Chestnut
Color Terminology 3 : Bay
Color Terminology 4 : Grey
Color Terminology 5 : White Patterns
Color Terminology 6 : Others
Overview of Canine Color Genetics
Rats & Mice
These were accidentally deleted and I'm slowly getting things together to hopefully have them up again.
Chapter 1 : Understanding the Lingo
Chapter 2 : Genetic Starting Point
Chapter 3 : Complex Dilutions
Chapter 4 : Eye Dilutions
Chapter 5 : Coat & Body Types
Chapter 6 : White Markings & Other Patterns
Chapter 7 : References

Cattle Color (to the best of my ability)

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:bulletblue: Home Page
:bulletblue: How to Join & Submit to the ECP
:bulletblue: ECP Artists & Associates
:bulletblue: Free Line Arts to Color
:bulletblue: Additional Resources
:bulletblue: Updates
:bulletblue: International Color Terminology by JNFerrigno
:bulletblue: Equine Color Genetics by JNFerrigno

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painted-cowgirl Featured By Owner Jun 7, 2013
Holy crap OLLLDDD comment at the top of the comment section lol Anyhow, regarding white, they say two white genes is lethal, but in the link you showed, it has seperate white genes interacting, as well as the same white genes interacting (W5/W5 for example, basically a homozygous W5), so is there any truth to the "lethal" white? Obviously those horses are tested, and most of them have age on them and appear to be makes me wonder...
JNFerrigno Featured By Owner Jun 7, 2013
The homozygous ones I noticed were W20/W20...but keep in mind that all these alleles behave differently on the Kit Locus. It's not the locus that is's the alleles. All I have to go off is the abstract, but if I have time I can look into it more. But if there are lethal whites, which are no Frame, then it is because of their alleles...which means that W1/W1 may be lethal, while W20/W20 is not. I don't know this to be fact, it's just an example.
Stauffer Featured By Owner Jun 19, 2013
there were w5/w20 horses in that paper too. Shew and Shew O Gold's 2012 colt and Padrama. Funny thing, Shew is w5/w20, her daughter, Shew O Gold is only w5, but then Shew O Gold's colt is w5/w20 (so it had to come from the sire...). They are thinking w20 is very widespread. Also, they are gonna need to rename these!! LOL
JNFerrigno Featured By Owner Jun 19, 2013
Lord, no kidding.
painted-cowgirl Featured By Owner Jun 10, 2013
Makes perfect sense :D Any info you get I'd love to know about, thank you!
Forget-Me-Not-Fields Featured By Owner May 16, 2013  Hobbyist General Artist
Wait ... doesn't this point into the direction of all 'random' horse markings being genetic?
That's awesome! :la:
GreenOakStables Featured By Owner Aug 3, 2012  Hobbyist
Anyone who knows about fjords? I mean with their more primitive colours, what gene codes do they have for their colour. I have a fjord mare who is a Red Dun, I would love it if someone would like to help me get some correct colour gentics for her.

I looked in to this several times but I just started to understand black and chestnut. I thought I'd started to understand bay and brown but know I'm confused again.. XD
Btw I have also a black Icelandic horse, and so far I think I might be able to give him his colour genetics buut.. All his legs are white, so is his face and he has a whithe tail tip due to the fact that he is splashed white, And he has blue eyes. How is this represented in the gentics?

Thanks on pre-hand for ANY help! XD And THANKS for posting this information! =D
JNFerrigno Featured By Owner Aug 8, 2012
Dun is caused by "D" or "Dn" depending on how you want to write it. And your icelandic would most likely be Splashed White which is not an uncommon pattern in them.
GreenOakStables Featured By Owner Aug 14, 2012  Hobbyist
THANK you so Much, It really mean ALOT!
But I guess you just dont simply put D or Dn, Do you add the normal gentics to that? I mean would a RED dun be represented with chestnut gentics and the dun gene, Like Aa ee Dn ? Or I'm complettly wrong now?

Oh, and yes, he is supoosed to be Splashed White. I made him when I found out there was a colour like that. But I was wondering will the splashed whithe "show up" in the genetic code and how should it be written? Or should I only write the gentics for black?
JNFerrigno Featured By Owner Sep 2, 2012
If I understood you, in order to be a "Red Dun" as in Chestnut + Dun, then yes the horse would have to be "ee + D_" where _ means the second gene does not matter in the expression of Dun.
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