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What is this coloration?

Having been to Argentina I’ve seen a coat pattern in the criollo horses there that doesn’t look exactly Appaloosa or paint and I saw a horse for sale from there that kinda reminded me of the colors I saw there. What would you call it?

All I can find is that it may be a variation of overo or marble sabino. Google both of those for images. Also:

Do a Google image search of the picture in your post. There seem to be several posts of this horse on Pinterest.


Yes fascinating. The English translation function is imperfect:) but I gather he is saying the criollo Overo patterns are not genetically the same as Frame Overo, though to me several of the photo examples look like Frame. I’ve also read elsewhere that the Overo gene mutates relatively easily providing different patterns beyond just Frame.

Wow! How striking!


It’s a white pattern that seems to be found only in Argentina

http://whitehorseproductions.com/ecg_basics4.html (scroll down)


This morning i find myself wondering if it could be something like Pintaloosa, thinking of the Tiger Horses.

Tiger Horses have LP and PATN genetics, very predictable in inheritance, though not predictable in phenotype

The Manchado situations has been found ONLY in Argentina, and across a few different breeds. The genetic cause is unknown, and doesn’t seem reliably heritable, so may be something environmental that flips a gene somewhere


I’d call him handsome.
I’m a sucker for a roman nose, radar-ready ears, and big feet.
While his color is amazing, especially the white forelock over his dark face, he’d be cute in any suit.


Could diet, specifically adding or lacking a certain mineral(s), also be a contributing factor? I remember reading an article somewhere years ago about horses developing (not necessarily born with it) a brindle coat pattern due to the nutrients in the soil. IIRC, it was endemic to horses in a very particular area of S. America. I’ve searched Google, but can’t find any link to an article mentioning it.

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I’ve never seen anything linking diet to brindling so would be really interested in reading about that. A copper deficiency can lead to white spots, as copper is required to produce healthy (amount and quality) melanin which is what creates color. I’ve never seen it linked to a brindle pattern though

It’s a weird pattern, because logic would say it’s just a mutation like every other white pattern, BUT, it’s in a variety of breeds, from TBs to Hackneys to Arabians, which implies that same mutation occurred in multiple breeds, and that just doesn’t make sense.


I wonder if it’s like reticulated leukotrichia or vitiligo

Horses in India also have a manchado like coloring


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That Indian horse looks like some sort of White mutation (of which there are many, KIT mutates a lot)

Reticulated leukotrichia and vitiligo are both skin diseases which develop, and AFAIK both colorings in this thread are there at birth


Yeah I was wondering if it’s * similar * to reticulated leukotrichia (which appears in youngsters) because manchado appears to start on the dorsal midline snd spread downwards.

The Marwari horses I’ve seen with this “roanappaloosa” thing did all seem to have white kegs. Is that why you’re saying it’s related to a white mutation?

(Also are you an equine geneticist as well as a professional equine nutritionist?! :slight_smile:)

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White (formerly Dominant White) often causes mostly to fully white legs when there’s also that much body white. I’m not sure who this horse iw


This is Puchilingui who is the founder of the W5 mutation, and a lot of his offspring have a very sinilar distribution of white vs color


:laughing: no, just studied color genetics a while :slight_smile:


It’s in a variety of breeds but only in this one country. Not in a given ecosystem. I’m going to guess this says something about early days breeding programs and record keeping.

Just like how Frame Overo is said to have mutated in North American horses of Spanish descent but is now present in TB. That suggests a little mustang blood way back in the TB lineage despite the fact the TB registry was closed by the time this would have been possible.

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Very possible, especially between TB and Arabian. But Hackney? Maybe? LOL

Maybe it mutated from Hackneys? They can have splash patterns similar to Clydesdales. I think that linked article said that in 19th century Argentina, breed affiliation was calculated by the sire, so “local mares” got into lots of breeds. Also the Argentinians loved spotted horses, and imported them (at a time when many countries scorned them) and bred and line bred for them too


I tried doing another Google search for the article I remember, again with no luck. I even added bircatcher spots as a possible hint. So annoying!

Anyway, while going down the rabbit hole, I also found a couple of interesting articles on coat color. One I’ve never even heard of and is exclusively found in Iceland. Confirmed it was a genetic mutation: https://www.cnn.com/2018/11/28/sport/icelandic-horse-iceland-ellert-intl-spt/index.html

And speaking of frame overo in N. American horses, I also found this article, for anyone who may be interested: https://www.centerforamericasfirsthorse.org/north-american-colonial-spanish-horse.html

(and sorry to the OP, I promise I’m not trying to hijack your thread!)

Yes, another W mutation (W21 in this case) because, well, KIT mutates a LOT LOL

Sponeneberg needs to be taken with a large grain of salt. A good bit of what he said/published has been invalidated due to modern genetics testing, even as it was widely accepted before all that.

Dun is a good example there. The horse - equus - was originally bay dun. Every other color is a mutation. I don’t know anyone modern who uses “zebra dun” to denote what I can only assume is bay dun (or just “dun”).

He’s not wrong though that Frame (overo) is a modern world mutation

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