Help me out - She's brown, not bay, right? - Page 2
 
 

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Help me out - She's brown, not bay, right?

This is a discussion on Help me out - She's brown, not bay, right? within the Horse Colors and Genetics forums, part of the Horse Breeds, Breeding, and Genetics category

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        03-17-2013, 03:05 AM
      #11
    Yearling
    Shade of body color has nothing to do with it. Agouti has three variations. Standard bay, Brown, and Wild bay.
         
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        03-17-2013, 03:06 AM
      #12
    Showing
    It's quite possible to have a brighter red base coat and still technically be a brown.

    Compare the OP's horse to my old gelding, who is a definite bay. Notice there are no lighter areas on my gelding like there are on the OP's horse.

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        03-17-2013, 03:06 AM
      #13
    Foal
    This horse is a standard bay according to the markings and colour and markings. Not a brown.
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        03-17-2013, 03:07 AM
      #14
    Foal
    Look on the website I posted. The first horse listed is a genetic bay and has light muzzle. So is my friends Arab who has been colour tested and found as a bay!!
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        03-17-2013, 03:10 AM
      #15
    Yearling
    Incorrect.

    Quote:
    Modifying black: Agouti (bay, brown, or solid)

    We've only discussed one LOCUS (spot where a pair of genes exists) on the horse's chromosome, so far: the E/e locus. Now we move on to another one, the AGOUTI locus, which contains a pair of genes that only affect black pigment.

    This means that if a horse has only red pigment (is "ee" at the red/black locus), the genes at the agouti locus have no effect on that horse's color.

    If the horse DOES have an "E" gene, meaning it does have black pigment, the agouti genes affect it as follows:

    A, or the BAY AGOUTI gene, when present on a horse with an E (black pigment) gene, will limit the black pigment to the points (mane, tail, lower legs) of the horse. A/bay is the "most dominant" of the agouti genes, and will always be active when it's present.

    At, or the BROWN AGOUTI gene, when present and active (no A gene) on a horse with an E (black pigment) gene, will allow the black pigment to spread over most of the body, but restrict it on the muzzle and underbelly, etc., causing those areas to be a tan color. At/brown is the "second most dominant" of the agouti genes, and will be active if no A/bay gene is present
         
        03-17-2013, 03:11 AM
      #16
    Foal
    What are you saying is incorrect?
    Quote:
    Originally Posted by grayshell38    
    Incorrect.
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        03-17-2013, 03:13 AM
      #17
    Yearling
    That the OP's horse is standard bay. It is Brown. Light coloration on the "soft" parts of the horse. Muzzle and around the eyes.
         
        03-17-2013, 03:13 AM
      #18
    Showing
    The first horse on the website you posted is a wild bay, which yes, have lighter points. However, wild bay also affects the leg points and mane, making them less black. The OP's horse has definite black legs and a black mane, nothing like the wild bay picture on that website.

    I agree with grayshell that, without better pictures, the sire actually appears to be a (dark) true bay, not a brown.
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        03-17-2013, 03:15 AM
      #19
    Trained
    Browns can have black points. That is a fact that I know. However, the shading (lighter muzzle, soft points light) will show a clear brown. A real bay won't have those shades. Right?

    Bay: "will limit the black pigment to the points (mane, tail, lower legs) of the horse."

    Brown: "will allow the black pigment to spread over most of the body, but restrict it on the muzzle and underbelly, etc., causing those areas to be a tan color. "
         
        03-17-2013, 03:16 AM
      #20
    Trained
    Unnecessary double when I realized I could still edit lol
         

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