Home Current News News Archive Shop/Advertise Ridecamp Classified Events Learn/AERC
Endurance.Net Home Ridecamp Archives
ridecamp@endurance.net
[Archives Index]   [Date Index]   [Thread Index]   [Author Index]   [Subject Index]

Re: [RC] [RC] Flaxen, Sabino gene - Zephyr Arabians

--- Kris <aggiekris@xxxxxxxxxxxx> wrote:
The difference is caused by some sort of
modifier (one of these days when i get funding, i
plan on doing a project
with sabino), similar to the leopard complex in
Appaloosas. One gene is
responsible for all 6 patterns, but as yet, no one
really knows the
inheritance of one pattern versus another. The
sabino (or leopard) gene is
resposible for opening a gate which allows whatever
variant of color for which modifiers are present.

I've been sitting out this discussion, but wanted to
jump in and say that Kris is making a good point here.
Sabino does not breed like a single-gene trait.  It
*may* be an "on/off" switch (like the Lp gene in
appaloosas) with additional modifiers controlling the
degree and type of expression, or it *may* be a
polygenic trait with no main "on/off" gene.  In other
words, because of the way sabino breeds and the wild
variance in expression, it's probably incorrect to
talk about a "sabino gene."  It's a pattern that is
likely controlled by multiple genes.  

Horses that are "regularly marked" (as little as a
blaze and some socks) can and do produce sabinos with
enough white to qualify for pinto registration.  As
humans we want to make rules about how much white &
where to be labeled sabino, but it's quite possible
that the genetics don't play by those rules.  This is
consistant with a polygenic trait.

~Nicole

Zephyr Arabians http://www.zephyrarabians.com 
KattWmn Web Design http://www.kattwmn.com


               
__________________________________________ 
Yahoo! DSL ? Something to write home about. 
Just $16.99/mo. or less. 
dsl.yahoo.com 


=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

Ridecamp is a service of Endurance Net, http://www.endurance.net.
Information, Policy, Disclaimer: http://www.endurance.net/Ridecamp
Subscribe/Unsubscribe http://www.endurance.net/ridecamp/logon.asp

Ride Long and Ride Safe!!

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


Replies
Re: [RC] [RC] Flaxen, Sabino gene, Kris