Question about pinto genetics - Page 2

       The Horse Forum > Horse Breeds, Breeding, and Genetics > Horse Colors and Genetics

Question about pinto genetics

This is a discussion on Question about pinto genetics within the Horse Colors and Genetics forums, part of the Horse Breeds, Breeding, and Genetics category

Like Tree6Likes

LinkBack Thread Tools
    10-20-2013, 01:12 AM
^^^Except for Little Joe Cartwright, who rode pintos. : )
JCnGrace likes this.
Sponsored Links
    10-20-2013, 01:19 AM
Green Broke
Thank you Sunandbeach.
    10-20-2013, 02:35 AM
Originally Posted by Tryst    
^^^^ this

Tobiano, splash, frame, sabino, black, cream, agouti, etc are each on their own loci. Each parent will pass a gene from each loci, so a horse can carry multiple patterns, and could, in theory, be homozygous for all of them.
Just touching on this. Tobiano and the only currently testable sabino are located on the same locus, so they cannot be homozygous for one and carry genes of the other. Also on this locus is roan and all of the currently testable dominant whites. I imagine the other forms of sabino and dominant white that aren't currently testable would be here too, and I would not be surprised if it turns out rabicano is too.
    10-20-2013, 10:51 AM
True roan is also on the same locus as tibia of as well. A horse that is to animal and roan is automatically heterozygous for both patterns.
Chiilaa likes this.
    10-20-2013, 12:01 PM
Originally Posted by NdAppy    
True roan is also on the same locus as tibia of as well. A horse that is to animal and roan is automatically heterozygous for both patterns.
I love your autocorrect so much
    10-20-2013, 12:06 PM
*facepalm* That's what I get for trying to post from my iPad.

It should say -
True roan is also on the same locus as tobiano as well. A horse that is tobiano and roan is automatically heterozygous for both patterns.

*sigh* Remind me just to read from my iPad and not post anymore.
Chiilaa likes this.
    10-20-2013, 12:28 PM
To the OP regarding passing on the black gene...

All horses are one of two base colors: red (ee) and black (EE or Ee). Then there are modifiers on top of that. In the case of your mare, she carries the brown form of the agouti gene (AtAt or Atat). There's also the bay form of the agouti gene (AA or Aa) and the wild bay form of the agouti gene (not sure the genetic designation for that one). So, your mare, being brown, would have to be EEAtAt, EEAtat, EeAtAt, or EeAtat. In order to produce a bay foal (if the foal was truly bay and not brown), the sire would have to carry bay agouti (AA or Aa). However, since agouti restricts the expression of black to the hard points of the horse and being a red-based horse, the sire wouldn't have any black to restrict, his agouti status would only be known through testing.

NdAppy and Chiila, that brings a related question to mind. Can a horse carry more than one form of agouti? For example, if the OP's mare is homozygous for brown could she be heterozygous for regular bay as well. Or are they mutually exclusive? I think I know the answer, but I'm still curious.
Posted via Mobile Device
    10-20-2013, 12:30 PM
A horse can be AA, AAt, AtAt, AtA+, AA+, A+A+, (A+ is wild bay, not testable) but cannot be homozygous for one form and still carry another
    10-20-2013, 12:56 PM
Ah, ok! That makes sense. Thanks, NdAppy!
Posted via Mobile Device
    10-20-2013, 01:57 PM
Green Broke
Thanks Drafty. Those agouti designations always confused the heck out of me back when I was doing research because I could never find a good source that put it in laymen's terms.

Nd, Drafty asked about being homozygous for brown, but can a horse be heterozygous for brown and heterozygous for bay (is this the AAt agouti?) and which color would be dominant?

I want to thank everyone for their input on this thread. It's fascinating and I'm even starting to get some of it through my thick skull. Keep up the discussions!

Quick Reply
Please help keep the Horse Forum enjoyable by reporting rude posts.

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Pinto/Paint Genetics? livestoride Horse Colors and Genetics 8 06-19-2012 09:38 PM
Pinto registration question QHDragon Horse Breeds 3 07-03-2010 12:43 PM
Pinto Genetics Cadence Horse Breeds 2 11-09-2009 08:20 PM
Lets talk about pinto genetics :) weefoal Horse Breeding 36 04-26-2009 01:36 PM

All times are GMT -4. The time now is 07:18 AM.

Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0