APHA color question - The Horse Forum
Reply
 
LinkBack Thread Tools
post #1 of 15 Old 09-17-2009, 01:18 PM Thread Starter
Foal
 
Join Date: Sep 2009
Posts: 28
• Horses: 0
APHA color question

I had a couple questions on paint colors that I was hoping someone could help me with and explain. My first question is how do you know if a horse is homozygous or heterozygous?
How is the coat pattern be determined? Such as, if you bred a tobiano to a overo, what would be the resulting pattern?
WindSnapper is offline  
Sponsored Links
Advertisement
 
post #2 of 15 Old 09-17-2009, 01:36 PM Thread Starter
Foal
 
Join Date: Sep 2009
Posts: 28
• Horses: 0
Also wanted to ad, my mare is a sorrel/white tobiano. She threw a solid chestnut foal when bred to a chestnut quarter horse. What does that tell about her as far as throwing color?
WindSnapper is offline  
post #3 of 15 Old 09-17-2009, 02:51 PM
Weanling
 
Join Date: Apr 2009
Location: Michigan
Posts: 490
• Horses: 2
APHA.Com - The Genetic Equation

Laura
"When you're young and you fall off a horse, you may break something. When you're my age, you splatter." -- Roy Rogers
ridesapaintedpony is offline  
post #4 of 15 Old 09-17-2009, 05:57 PM Thread Starter
Foal
 
Join Date: Sep 2009
Posts: 28
• Horses: 0
Thanks for the link!
WindSnapper is offline  
post #5 of 15 Old 09-17-2009, 06:29 PM
Trained
 
Join Date: Apr 2008
Location: Orange County, NC
Posts: 6,182
• Horses: 5
You can also play with the genetic calculator at Color Calculator

It will show you all the probabilities based on pattern/color.

On the sixth day, God created the Quarter Horse.
On the seventh day, he Painted the good ones.
PaintHorseMares is offline  
post #6 of 15 Old 09-17-2009, 11:24 PM
Yearling
 
Join Date: Sep 2009
Posts: 972
• Horses: 0
It tells me that your mare is heterozygous (homozygous would through tobiano everytime). The coat pattern is determined by what is given by each parent.

Tobiano can be heterozygous which means the horse carries only one Tobi gene (and will pass it 50% of the time), and homozygous which means a horse that carries two tobi genes and will pass one 100% of the time.

Overo is alittle more complicated, partly because there are more then one type of overo, and because some forms (maybe all, I don't know) can hide, and a horse can look solid.

If you breed hetero tobi to overo, you may get a tobi, overo, or a combo of both, or you may get a solid foal.

Hope that helps.
haviris is offline  
post #7 of 15 Old 09-18-2009, 05:05 AM
Started
 
Join Date: Nov 2008
Location: New River, Az
Posts: 2,472
• Horses: 0
chestnut to chestnut ALWAYS gives chestnut, so that doesn't tell you anything ;) (other than being likely heterozygous tobi... I say likely, because did the foal have any white? There are proven (tested) tobianos who just have white on their legs! But white legs can also be caused by splash and sabino (two of the three over genes, the other is frame)).
CheyAut is offline  
post #8 of 15 Old 09-18-2009, 08:22 AM Thread Starter
Foal
 
Join Date: Sep 2009
Posts: 28
• Horses: 0
Would I have to bred to a homozygous tobiano or overo stallion in order to have a 100% chance of a colored foal? If I am understanding correctly, if I bred her to another heterozygous stud there is a 25% chance the result could be a solid foal, correct?
WindSnapper is offline  
post #9 of 15 Old 09-18-2009, 06:36 PM
Yearling
 
Join Date: Sep 2009
Posts: 972
• Horses: 0
Yes, you'd have to breed her to a homozygous tobi to guarantee color. To my knowledge there are no homozygous overos (although a horse can be tovero and be homozygous for tobi, that would give you a 100% chance of tobi and a 50% chance for tovero).

However, just remember color should be the last thing to consider when breeding. It is my opinion that there are enough horses out there that you should be able to get the one you want, in the color you want, but conformation, temperment, health, etc., should always come before color.
haviris is offline  
post #10 of 15 Old 09-18-2009, 07:36 PM
Weanling
 
Join Date: Apr 2009
Location: Ohio
Posts: 346
• Horses: 3
I see so many horses listed as solid when in fact they are minmal expression tobianos.

Here is one of my stallions Black----I knew when he was a foal he was tobiano because of the white socks. His breeder said no way he was solid. So after I bought him I had him tested and yep he carries 1 copy of the Tobiano gene

weefoal is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the The Horse Forum forums, you must first register.

Already have a Horse Forum account?
Members are allowed only one account per person at the Horse Forum, so if you've made an account here in the past you'll need to continue using that account. Please do not create a new account or you may lose access to the Horse Forum. If you need help recovering your existing account, please Contact Us. We'll be glad to help!

New to the Horse Forum?
Please choose a username you will be satisfied with using for the duration of your membership at the Horse Forum. We do not change members' usernames upon request because that would make it difficult for everyone to keep track of who is who on the forum. For that reason, please do not incorporate your horse's name into your username so that you are not stuck with a username related to a horse you may no longer have some day, or use any other username you may no longer identify with or care for in the future.



User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Old Thread Warning
This thread is more than 90 days old. When a thread is this old, it is often better to start a new thread rather than post to it. However, If you feel you have something of value to add to this particular thread, you can do so by checking the box below before submitting your post.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Foal Color, help me guess what color he'll shed out.. frogtree Horse Breeding 11 04-25-2012 10:29 PM
Color question, and pic showoff! jardini Horse Breeding 11 06-30-2009 07:38 PM
foal! color question? Starryeyed Horse Breeding 13 05-08-2009 03:09 PM
Question about color genetics?? close2prfct Horse Breeding 51 03-17-2009 07:37 PM
Another Foal Color Question AKPaintLover Horse Breeding 7 07-15-2007 10:11 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome