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-   -   Palomino with dorsal? (http://www.horseforum.com/horse-colors-genetics/palomino-dorsal-162057/)

Yellowhorse123 03-25-2013 04:48 PM

Palomino with dorsal?
 
3 Attachment(s)
Lemme just say i know next to nothing about colors, but I was looking at my guy and he's weird. lol. But I've always noticed this but never thought much of it. Why does my palomino have a dorsal stripe? Also, I think hes sooty because his mane has some black strands. Also when he sheds out he has super dark almost black patches like on his butt and chest. But does sooty make him have spots too? He has like 3-5 big solid dark brown spots.

In the first one you can see his dorsal some and the biggest black spot.
In the second one you can see more black spots like on the inside of his knee and back.
And the last one you can sort of see how black those splotches on his butt get. It's darker up close but I dont have many good pictures.

Sorry for the length, I'm just super curious with little knowledge in this area. (:

Poseidon 03-25-2013 04:52 PM

The big spots are called Bend Or spots or grease marks. Not uncommon, particularly on red based horses (chestnut, palomino, etc).

Do you have any other pictures of his back? I can see a hint of what you're referring to as a dorsal stripe in the first, but the shine on his back makes it hard to say much about it.

Yellowhorse123 03-25-2013 05:00 PM

1 Attachment(s)
Sorry had to go get one. Hes lighter colored still with his winter coat.

GamingGrrl 03-25-2013 05:01 PM

Looks like counter shading to me, not a dorsal stripe.
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Yellowhorse123 03-25-2013 05:06 PM

Oh okay, well thanks for letting me know about those weird spots and that its not a dorsal. How do you tell its counter shading and not dorsal?

verona1016 03-25-2013 05:34 PM

A 'real' dorsal stripe is associated with the dun gene and is very crisp and clearly defined, as if someone took a thick marker and drew a line down the horse's back. Often it will appear as though it continues into the tail. Here's a good example:

http://www.duncentralstation.com/Pri...orm-dorsal.jpg

Countershading is not associated with any particular gene and can appear on any color horse. It's not usually as clearly defined, however it rare cases it can appear just as defined as a true dorsal (in which case you'd have to determine if the horse has carries dun through some other means, such as genetic testing). There's one HF member who has a very good picture of her Arab with a very distinct dorsal- in this case, it's genetically impossible for the horse to be dun (Arabians don't carry the dun gene) so it can be determined that it's just countershading without genetic testing. However, in some cases it can be very hard to tell for sure just by looking.

The opposite also happens- the dorsal stripe on some colors is not very pronounced (happens a lot on double dilutes, and sometimes on single dilutes like dun palominos). Breeders & owners who don't know a lot about color won't recognize the subtle signs of the dun gene because it's not very pronounced, and then when they breed that horse they get unexpected duns!

Yellowhorse123 03-25-2013 05:44 PM

Ahh, okay that all makes since. Well thanks y'all, maybe hes not so weird lol (:

NdAppy 03-25-2013 05:59 PM

Good pictures here on how countershading and dorsals can look so similar. http://www.horseforum.com/horse-colo...ty-dun-153501/

Faceman 03-25-2013 11:28 PM

Quote:

Originally Posted by Yellowhorse123 (Post 2024969)
Ahh, okay that all makes since. Well thanks y'all, maybe hes not so weird lol (:

No, not weird - pretty normal. Just FYI, dorsal striping is the vestige of the "dark on top, light on bottom" pattern that many, many animals of all sorts and species display. It is a basic camouflage color scheme where the dark blends in with the ground from above and the light blends in with the sky from below, as well as a "heat absorption from the top and cold rejection from the bottom" color scheme...


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