Agouti Gene question
   

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Agouti Gene question

This is a discussion on Agouti Gene question within the Horse Colors and Genetics forums, part of the Horse Breeds, Breeding, and Genetics category
  • What is agouti gene in horses
  • Agouti gene horse

 
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    11-23-2011, 10:45 PM
  #1
Green Broke
Agouti Gene question

I'm still trying to learn about some of the genetics and I'm curious as to the Agouti Gene in relation to my horse. Mind you, I'm not planning on breeding, couldn't even if I wanted to as he's a gelding. This is just for learning and out of curiosity.

Cinny is black He's registered black. I have not had genetics done but my question is this. He fades to a bay, sometimes a very light bay. Does this mean he most likely has an agouti gene? I kind of heard it somewhere and it made me curious. I just thought it meant he was not homozygous for black, I didn't know it meant he could have the Agouti gene.
     
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    11-23-2011, 11:04 PM
  #2
Trained
Well to break it down to basics.

There are only two true colors in horses. Everything else is a modification of those two colors. Those two colors are Black (Ee or EE) and red (always ee).

Agouti is bay (A), brown (At) and wild bay (A+). Agouti causes black to be restricted to the points (ears, legs) of the horse. Every horse is different in how exactly agouti affects them.


Cinny is black. He has no agouti (which would cause him to be one of the above. Cinny is a form of what is called "fading black" meaning that his black color gets burnt in the sun.

Hope this helps.
     
    11-23-2011, 11:10 PM
  #3
Green Broke
Thank you, I think it does. So basically even though Cinny may look bay in the summer, he actually does not have that gene, he has just spent too much time in the son and genes have nothing to do with his summer look.
     
    11-23-2011, 11:12 PM
  #4
Trained
Yep! Basically it's like people who spend a lot time outdoors and their hair is lighter as a result. His coat has the same thing going on.
     
    11-30-2011, 05:40 PM
  #5
Foal
Quote:
Originally Posted by NdAppy    
Well to break it down to basics.

There are only two true colors in horses. Everything else is a modification of those two colors. Those two colors are Black (Ee or EE) and red (always ee).

Agouti is bay (A), brown (At) and wild bay (A+). Agouti causes black to be restricted to the points (ears, legs) of the horse. Every horse is different in how exactly agouti affects them.


Cinny is black. He has no agouti (which would cause him to be one of the above. Cinny is a form of what is called "fading black" meaning that his black color gets burnt in the sun.

Hope this helps.
He looks black in the photos. SOME horses with At (Brown) do look black, but they will have the giveaway lighter muzzle, flanks and armpits. These are Seal brown. I would not suspect him of being seal since I see no traces of pangare (the light points). Other brown horses can look almost identical to bay (with the pangare). I once had a black TWH that faded almost to buckskin in the Texas sun. Black can be fading or non-fading, he's just a fading black.

Marga
     
    11-30-2011, 05:54 PM
  #6
Trained
I know what brown looks like. There is quite a large discussion about "Bad Ass Browns" here in the color section with many, many examples. I, in no way, thought the OP's horse is brown.

I brought up brown as she asked about agouti and brown of one the agouti modifiers. Leaving it out would make no sense.
     
    11-30-2011, 07:05 PM
  #7
Foal
Quote:
Originally Posted by NdAppy    
I know what brown looks like. There is quite a large discussion about "Bad Ass Browns" here in the color section with many, many examples. I, in no way, thought the OP's horse is brown.

I brought up brown as she asked about agouti and brown of one the agouti modifiers. Leaving it out would make no sense.
Which of these two horses is brown? One of them is tested EeAa, the other is E_Ata.

http://www.shadowscastle.net/MM_Sonata_MR_2.jpg

They are in no way related, at all. Brown is one of those colors that has many shades, and if often confusing. The Jockey Club would NOT, for many decades, register a horse as black, since there were so many seal brown TBs. Brown was once though to be just black with Pangare markings, which is now confirmed not to be the case.

Don't get me wrong, I LOVE a black horse, but there are many seal horses still advertised as black!

Marga
     
    11-30-2011, 07:13 PM
  #8
Trained
For one thing, I would never guess color off that picture. Not when it comes to brown. Neither horse is picture well enough.

I know browns (bays and every other color under the sun) come in many different shades.

You are deluded if you do not think that brown and bay are related. Bay, brown, and wild bay are all forms of agouti that restrict black in different ways...
     
    11-30-2011, 07:16 PM
  #9
Trained
I can tell you that about every fifth thread or so in this subforum is a discussion about the differences between bay and brown. If you look in those, you will see that both NdAppy and myself know what bay looks like and what brown looks like.
     
    11-30-2011, 07:20 PM
  #10
Trained
The badass brown.
     

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