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catch a bird terminology

colorfan March 15, 2012 March 15, 2012

Forums

On a website http://www.brindlehorses.com/brindlehos/stallions/Catch_A_Bird/bird.htm they say Catch a Bird could be either a mosaic or chimera? Are they the same term? The article also mentions that there is a unique grey/roan in Thoroughbreds. Could anyone point me to an example of that? Seems the the gray pool is deepening, :-? :grin: There is the gray we are all used to,and if you think that the quick graying are one kind and the slow graying are another kind that is two types, then the Andalusian gray and now apparently a gray in TB's.

Monsterpony Thu, 03/15/2012 - 20:05

I would call Catch a Bird a de novo mutation of KIT resulting in a classic roan type expression.

I would doubt that there is another grey mutation, but there certainly could be modifier mutations that affect grey expression. The grey mutation is a duplication and reinsertion of a large section of DNA. The chances of that type of mutation happening more than once are incredibly small.

Katie Sat, 03/17/2012 - 08:33

I think that the line they are drawing between "grey-roans" in this case is that very often, people will mistake a greying horse for a roan. Not that there is a different type of grey in TBs.

Threnody Mon, 03/19/2012 - 14:03

It has been found very likely that CAB was [u]not [/u]a chimera since all tested brindle roans have been negative for chimerism. Sometimes mixed white patterns can skew into stripes.