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Rabicano Question and mane color question

Hello all! I'm new here, but am intensely interested in all things color genetic related. I am lucky to be owned by a small herd of minis. You'd think with my interest with color, I would have more "colored" horses. Most of mine are solids. ymwhisle I have a mini mare who is chestnut, and also appears to be rabicano (skunk tail, body roaning including face and legs). She's had 4 foals for me. 3 of those 4 also appeared rabicano (I only own one of the foals now, the other 3 have been sold). Ironically, the one colt who appeared completely solid was the only one sired by a pinto stallion (tobiano/splash I believe), and the only black foal. The others are all chestnut. The other three were sired by solid black stallions (two by an overo bred but solid colored stallion (both these foals roaned extensively, the filly more so, the colt was flaxen), and the other by a tobiano bred but solid stallion, who is developing some roaning of his own on his flanks and butt at 7 (this colt had very minimal roaning, and was also flaxen)). The filly I retained is now 5, and quite roaned (full body). She also inherited her dam's "silver" mane (multicolored, with red, silver, white, flaxen and black colored hairs- their tails are the same colors- their manes and tails appear a lighter red color from a distance). Since the filly's full brother was flaxen, is this a flaxen gene trait? Or just an oddity? It's not a trait I see often, and they are the only two I have that have it. The sire is an overo bred but solid black stallion (filly's full brother was flaxen). The stallions bloodlines included LWO+ lines, and he did throw a belly splashed colt, with an apron face (out of a splash/tobiano bred solid silver buckskin or palomino... color doesn't look right for palomino, but she doesn't have the darker points a silver buckskin would have- and silver buckskin is definitely a possibility). :hammer These two mares roaning does change every year... for instance, the filly's two year old year was extensively roaned- so much so she almost appeared as a true roan. She is now 5, and while still obviously roaned, not nearly as extensive (appears chestnut with moderate roaning- but obviously is roaned). The mare is 14 this year, and her face is more roaned than it has been previously. Her body roaning is less than it was last year, with a bit more concentrated in her flank/hind end. :roll: Since I actually really like rabicano coloring, I'm quite happy with her foals. :love My question is this: is there any way I can guarantee they are indeed rabicanos? What are the chances I will continue to get rabicanos out of the mare? I'm assuming the chances will be the same for the filly. Although, both will be bred to a true roan stallion, so I guess that's somewhat of a moot point for a while. It took me a while to decide this mare and her foals were rabicanos. They don't exhibit the "normal" flank positioned roaning. Is it possible there is more than one type of rabicano? I haven't really seen any other obvious rabicano who was marked the way my girls are. I would be happy to email pics of these horses to anyone. I am somewhat challenged with posting pictures! Sorry for being so verbose... I wanted to be clear what possible genes could be involved. :oops:

lipigirl Mon, 06/07/2010 - 03:52

Hi and welcome to the board !

There is not currently a test for Rabicano and we just tend to look for it's various traits in horses instead, sounds like you have one anyways but what you have described and having various different colours in the manes and tails of chestnuts is quite common. Your mare could keep producing foals with a bit of chrome every time she is bred...just depends on the odds.

horsegen Mon, 06/07/2010 - 11:43

It is thought by researchers that rabicano is a dominant trait. Our analysis of families segregating for rabicano would seem to bear that out, although they are rare enough that it's hard to be sure. If it is a simple dominant, it sounds like your mare is heterozygous for rabicano and will therefore throw rabicano foals 50% of the time.

Not all rabicanos exhibit the traditional coloring of "flank-only" roaning. This may be because there are modifying genes at work, or because some horses have other genes, like true roan or sabino, that cause additional roaning on the foals.

ImperialAcres Mon, 06/07/2010 - 12:33

I'll get in touch with the owners of the solid black colt... he was sold at 8 months, and is now a yearling. Since some of his older siblings did show their rabicano traits later (as yearlings), it is possible he did inherit the gene, and just hadn't expressed it yet. I didn't fully clip him before he sold (only head and necked him), so it is possible I just missed any roaning (he was a HAIRY colt).

This mare did have two other foals for her previous owner before me. The gelding is very roaned now (sired by a solid buckskin), and the filly was sired by a pintaloosa stallion, and is also roaned, with high socks on all four. I have never seen either of these foals in person, only in pictures. This is what they were described as, and appeared to be in the pictures.

All of these horses (except the pintaloosa sired filly) appear to be solid, save for the rabicano roaning. I didn't think there were other modifying genes, but it is possible. Thank you for your help.

WhyNot-Ponys Thu, 07/22/2010 - 11:22

Back with the rabicanos.

We have a mare - Smoky Black with a little white star and seemingly Rabicano.
None of her ancestors show Rabicano ....... but her father has leopard spotting .....