Brindle!

[abisheridee]

Help me genetics people- are brindle markings in horses REALLY caused by two twins fusing in the womb, and the horse then having two sets of DNA?

If this is true, it's amazing! :eek:

[chev]

It can be. It's called chimerism, and happens when two non identical embryos fuse together, producing the brindle stripes and two sets of DNA.

Not all brindles have two sets of DNA though, which led Sponenberg to the conclusion that sooty is involved and instead of being dark hair spread evenly through the coat, it was separated into verticle stripes of darker colour.

Other than chimerism, brindle is not well understood as yet.

[chev]

There's some examples of brindle on this site. (http://www.whitehorseproductions.com/ecg_basics4.html)

Just as an interesting point about relying on some sites for info... further down the page they have an example of an Arab with birdcatcher spots. He's a chestnut colt with blaze and four socks. And he's not an Arabian... he's a sec B! How do I know this? Because he used to belong to Arabmare on here and it's one of her pics....

[Troi]

Chev What causes dappling please. I have a dappled palomino. Well I think she's a palomino!
I think having read that site you recomended that I have a faded black. She looks brownish in summer.
Mother chestnut sabino, one sock, blaze and white hiars in coat. Father black. I'll try and dig out some pics.

[abisheridee]

Thanks Chev! I love the colouring, and was researching it today and saw that picture on the website. Lovely horse and does look quite Arabian, can see how they got it wrong! :):rolleyes:

[Gurnosstud]

Wow!! Some very wierd but nice horses on there!

[chev]

Chev What causes dappling please.

That's a question that hasn't been answered yet. It's believed it may be connected to nutrition, but that is yet to be proved.

[hannafordj@goog]

can i just say how interesting and informative it has been reading this post and some oif your other posts on color genetics, its so refreshing to have someone so obviously extremely knowledgable about a subject posting and replying to different people with such patience and without forcing your ideas and theries down peoples throats, I read lots of different forums, but rarely post anything as I have seen people shot down in flames, there ponies insulted and there opinions laughed at. New rider is very friendly and knowledgable and i intend to spend a lot more time on here than on the other sites and may even risk a post or 2!

[Troi]

Thanks Chev:)

[minxymare]

Chev, that was really interesting, thank you for posting, ditto the above posts

[ToG]

interesting link! Thanks

Everyone asks why my colt has a light tail yet he is bay.

Maybe this would explain it? i have no idea??
Gulastra Plume: A gulastra plume, named thus by Arabian breeders, is an interesting manifestation of sabino that creates a light colored tail on an otherwise solid-colored horse.


Time will tell if he bays out though - he's 2

[chev]

Sabino does cause light coloured tails on solid horses - it's not uncommon. This pic shows it on a liver chestnut I used to own. (please forgive the gangly look, she was only two!)

http://img.photobucket.com/albums/v231/bronyfelin-ponies/cleverTia.jpg

[Stormin]

It can be. It's called chimerism, and happens when two non identical embryos fuse together, producing the brindle stripes and two sets of DNA.

Not all brindles have two sets of DNA though, which led Sponenberg to the conclusion that sooty is involved and instead of being dark hair spread evenly through the coat, it was separated into verticle stripes of darker colour.

Other than chimerism, brindle is not well understood as yet.

That's interesting ... I was reading an article on Brindle QH's and they stated that not all brindles are chimeras but all chimeras are brindle ...

[ToG]

Sabino does cause light coloured tails on solid horses - it's not uncommon. This pic shows it on a liver chestnut I used to own. (please forgive the gangly look, she was only two!)

http://img.photobucket.com/albums/v231/bronyfelin-ponies/cleverTia.jpg

Thank you! That tail is just like Alfies :)