color variations

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color variations

This is a discussion on color variations within the Horse Breeding forums, part of the Horse Breeds, Breeding, and Genetics category

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    03-03-2009, 09:17 AM
color variations

Ok so I need a little help. I am looking for any information anybody has on "sooty" palominos I have read alot about the creme gene and dilutions on the chestnut and bay genes and understand the whole Palomino vs cemilo vs chestnut part but my issue is what EXACTLY makes a Palomino "SOOTY". I just bought a mare that has genetically tested as "sooty" palomino and so I am being lead to understand that it is some sort of genetic varaition and not just a darking of the palomino coloring.

Anyways any help would be appreciated.

Thank You
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    03-03-2009, 01:31 PM
I've done a lot of research on palominos since buying one!

The 'sooty' effect is a 'modifier' in the same way that the dilute gene causes the palomino effect on the chestnut. In the same way that the grey gene can vary a horse between very dark grey through to white, the sooty gene can cause anything from a few dapples through to giving the coat a 'dirty' look and some seriously heavy dappling. 'Sooty' palominos also have a tendancy to change colour with the seasons.

The sooty gene doesn't only work on palominos - it can cause variations in any coat colour, and it is thought that any form of dapples (apart from in greys) is caused by the sooty gene.
    03-03-2009, 11:30 PM
Thank you! That makes sense. Like I said genetic and color isn't my area of expertise and so trying to wade through some of the information out there can be difficult. Thanks for your time!
    03-03-2009, 11:45 PM

So, my mare is a buckskin tobiano, with minimal white. She gets black spots in her coat in the summer time, when its really rich dark buckskin in color. She also has quite a few dapples.

In the winter time, her coat gets really light colored, and all hints of black spots and dapples are gone?

What would this be called, since I am pretty inept at genetics?
    03-03-2009, 11:56 PM
Dapples can come from the sooty gene or they can sometimes be cause by nutritional factors (fat horses). 99% of the time dapples cannot be seen in the winter coat. As for the "black spots", are you talking about something kinda like this?

    03-03-2009, 11:59 PM
Yes, those are the spots! They are slightly smaller, yet, not the flea bitten look.

The spots are really pronounced in her socks.
    03-04-2009, 12:48 AM
Those are known as "bend or" spots or grease spots. They are fairly common. Although the spots in her socks could be caused by her tobiano breeding.

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