color genetics questions - Page 3
 
 

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

color genetics questions

This is a discussion on color genetics questions within the Horse Breeding forums, part of the Horse Breeds, Breeding, and Genetics category
  • Breeding tobiano to a overo
  • Breeding an overo to a tobiano

 
LinkBack Thread Tools
    03-17-2009, 12:40 AM
  #21
Weanling
I have been doing a lot of reading up on this since it's a subject that so many like myself don't quite understand how breeding what to what gets you what? Lol.
     
Sponsored Links
Advertisement
 
    04-01-2009, 06:47 PM
  #22
Foal
You can't have a homozygous overo because that would mean your horse would have the "lethal-white syndrome." The horse will die within 72 hours because it has no immune system. If you breed an overo to another overo you will have a 1 in 4 chance of having a foal with the lethal white syndrome. If you breed tobiano to overo you wont have this problem but if you're willing to take the chance of killing a foal then by all means breed overos to overos.
-Bridget
     
    04-02-2009, 04:50 AM
  #23
Started
^^^ true of FRAME overos. Sabino and Splash are also overos, and you can certainly have those in H/Z form. And just because a horse is tobiano doesn't mean it doesn't also have frame. Frame can be "invisible" on a horse (meaning, nothing indicating it's there, esp if other pinto genes are present).

You can have a horse tested for frame (LWO) very easily and inexpensively, HIGHLY worth it!
     
    04-03-2009, 03:23 AM
  #24
Foal
Your horse can't be homozygous for Tobiano or Overo. It could be homozygous for color if both parents are the same color. The only thing close you can get to homozygous when you breed a Tobiano to and Overo is a Tovero. Toveros will produce a Tobiano, Overo, or Tovero foal. No solid foals because a Tovero will pass on a Tobiano gene or an Overo gene.
     
    04-03-2009, 04:30 AM
  #25
Started
^^ Not true.

Most horses are not JUST tobiano. Most have SOME overo (even if it's just sabino). So if a "tobiano" was bred to an "overo" you still COULD get one that is H/Z for tobi and/or some form of overo, IF the parents weren't "just tobi" or "just overo." I say that because horses will be registered tobi, overo, or tovero, but realy the majority are likely "toveros" and just not registered as such. Being just "overo" is more likely than just "tobi."

A "tovero" horse is NOT H/Z just because it has tobi and overo. You ABSOLUTELY CAN get solid offspring from them. The "tovero" MAY pass on Tobi, MAY pass on overo, MAY pass on both, or MAY pass on neither.
     
    04-03-2009, 05:33 PM
  #26
Weanling
>>>> You can't have a homozygous overo because that would mean your horse would have the "lethal-white syndrome." The horse will die within 72 hours because it has no immune system.


Not entirely true-- their imune system is not affected---the defect associated with LWO is an incomplete/defective digestive tract (if you google Lethal White Overo Syndrome or horse "ileocolonic aganglionosis" you will find a wealth of online references). The foal dies because it cannot digest/pass waste. If not euthanized, the foal starts to show signs of excruciating colic a few hours after it starts to nurse.
     

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

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



All times are GMT -4. The time now is 11:27 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0