Dorsal Stripes on Red Horses - Page 2 - The Horse Forum

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post #11 of 20 Old 08-09-2013, 08:10 AM
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Definitely without a doubt your horse is not dun. And like I said dorsals aren't seasonal and your horses coat is not diluted.

And lovemydunboy I could tell all those horses where dun just by their tone. Dun has such a specific tone to it kinda peachy/apricot matte. Even on dark tones its still noticeable even on extremely dark grulla's. The dunalino is kinda hard to tell but those weren't the best pics and dunalino's can be kinda tricky to identify. Even on my Dunskin you can see the peachy tone your dunalino has it too I bet even though it has cream as well.
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post #12 of 20 Old 08-09-2013, 01:03 PM
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My red dun shimmers with gold after a bath. You would never confuse his coloring as sorrel. After a good washing or brushing, the hair glistens almost golden over red.
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post #13 of 20 Old 08-09-2013, 10:55 PM Thread Starter
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Yeah, as I was reading into it more I think y'all are right. Not dun, but countershading definitely. Now another question, what gene causes that?
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post #14 of 20 Old 08-09-2013, 10:59 PM
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This is horse isn't a dun - if he were there would be dorsal stripes on his back legs.

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post #15 of 20 Old 08-09-2013, 11:07 PM
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The dun shimmer- like this? Dun dilution is just a different color all together than sorrel.

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post #16 of 20 Old 08-09-2013, 11:38 PM
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This is horse isn't a dun - if he were there would be dorsal stripes on his back legs.
Dorsal stripes are not on the legs I think your talking about leg baring or tiger stripes which are not on all duns the only required dun characteristic is the dorsal stripe on the back.
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post #17 of 20 Old 08-10-2013, 12:34 AM
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From what I understand, a countershading dorsal stripe is a side effect of the sooty gene that appears on some horses. Sooty can cause a horse to have markings that mimic dun including the dorsal stripe, shoulder barring, and even sometimes leg barring. But, with sooty, these markings are often much less defined.

For example, this mare is a sooty bay (or maybe a sooty brown). I know for certain that there is no dun anywhere in her lineage.
(sorry for the crappy pictures, they're the best I've got to show her coloring)





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post #18 of 20 Old 08-10-2013, 10:01 AM
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The dun shimmer- like this? Dun dilution is just a different color all together than sorrel.

Yes. But Sam is definitely a red head. I agree about the coloring. After owning a red dun I don't know if I could find any other coloring as pleasing to me.
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post #19 of 20 Old 08-10-2013, 11:38 AM
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Yeah, as I was reading into it more I think y'all are right. Not dun, but countershading definitely. Now another question, what gene causes that?
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Dorsal stripes, whether due to dun factor or "counter shading", are primitive markings present in the vast majority of animals in one form or another. They are vestiges of the "dark on top, light on bottom" coloration that animals evolved in the sea for protection against predators, with the light underneath blending with the sky when viewed from underneath and the dark dorsal area blending in with the darker sea depth when viewed from above. The protective coloration was kept when animals evolved into land creatures, and many animal species still carry a vestige of that pattern to some degree. Man has bred out most of the primitive markings in horses, but dorsals and other primitive marking are more pronounced in duns because they carry a primitive marking gene...
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post #20 of 20 Old 08-11-2013, 02:35 PM Thread Starter
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Originally Posted by Faceman View Post
Dorsal stripes, whether due to dun factor or "counter shading", are primitive markings present in the vast majority of animals in one form or another. They are vestiges of the "dark on top, light on bottom" coloration that animals evolved in the sea for protection against predators, with the light underneath blending with the sky when viewed from underneath and the dark dorsal area blending in with the darker sea depth when viewed from above. The protective coloration was kept when animals evolved into land creatures, and many animal species still carry a vestige of that pattern to some degree. Man has bred out most of the primitive markings in horses, but dorsals and other primitive marking are more pronounced in duns because they carry a primitive marking gene...
That actually makes a lot of sense! Nature is friggin cool. Thanks for sharing that!
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