Stallions - Herda Carriers - Page 2
 
 

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

Stallions - Herda Carriers

This is a discussion on Stallions - Herda Carriers within the Horse Breeding forums, part of the Horse Breeds, Breeding, and Genetics category
  • 100 square punnett square problems
  • Punnett square to show genetics

Like Tree15Likes

 
LinkBack Thread Tools
    12-29-2011, 12:49 PM
  #11
Foal
If I get too many requests I'll try to get the list in a form I can attach to those interested. My printer doesn't scan, but I can take digital photos when my friend returns my camera.
     
Sponsored Links
Advertisement
 
    12-29-2011, 12:53 PM
  #12
Banned
Quote:
Originally Posted by farmpony84    
So if I undertsand this correctly, if the horse is a carrier then 25% of it's offspring have a chance of being affected. It doesn't say what percent would be a carrier (do we assume all?)

Then if you breed a carrier to a normal horse you positively will not get a HERDA affected foal yet you run the risk of having a carrier.

So... In a perfect world I would assume the "fix" would be to dis-allow any breedings of a HERDA carrier or only allow it to breed to a "normal" horse but then sterilize the offspring...?
I'm not sure I understand your question.

Breeding non carrier to non carrier results in 100% "clear".

Breeding carrier to non carrier results in 50% carriers and 50% "clear".

Breeding carrier to carrier results in 25% afflicted, 50% carrier, and 25% "clear".


ETA: As most people know, I am opposed to breeding HERDA carriers...
     
    12-29-2011, 01:04 PM
  #13
Super Moderator
Quote:
Originally Posted by Faceman    
I'm not sure I understand your question.

Breeding non carrier to non carrier results in 100% "clear".

Breeding carrier to non carrier results in 50% carriers and 50% "clear".

Breeding carrier to carrier results in 25% afflicted, 50% carrier, and 25% "clear".


ETA: As most people know, I am opposed to breeding HERDA carriers...
That doesn't match the data that I was reviewing on a medical website. What website were you researching? Also the website I was looking at showed that some will be affected meaning they are afflicted with the disease and then it mentioned a percentage that would be carriers meaning they could pass it on. I'm curious, is it possible for an afflicted horse to not be a carrier or do the 2 go hand in hand?

I also read that a carrier can be bred to a non-carrier and only have a percentage of carriers. I'll go back and find the link if I can.

I really don't know much about the mechanics of HERDA so I'm actually asking questions out of pure interest.

For opinion purposes I want to add my caveat:

I do not believe in breeding a known carrier of any genetic disease or defect. There are plenty of horses with the same bloodlines and attributes that are "clean".
     
    12-29-2011, 01:12 PM
  #14
Trained
Farmpony - Face's math is right. He didn't get that from a website. It's simple genetics.
     
    12-29-2011, 01:17 PM
  #15
Super Moderator
NdAppy - Just to let you know, I read your response as "You are stupid". T

Anyway,
I have a basic understanding of genetics but hold no degrees in science or biology.

This is a qoute from the below site:

For horse breeders, identification of carriers is critical for the selection of mating pairs. Breedings of carrier horses have a 25% chance of producing an affected foal. Breedings between normal and carrier horses will not produce a HERDA foal although 50% of the foals are expected to be carriers.

Horse HERDA

This website below is the one that has me confused. It states that a carrier and a non carrier will give you 50% carrier, 25% afflicted, and 25% clean. The way they broke it out it appears that the 25 percent afflicted is in it's own group. Does that mean they are afflicted but not carriers?

Of course this site may be a bad reference because it shows if you take a carrier and breed it to a non-carrier then you get 100% carriers but that's not true.

http://ckmobileequine.ca/articles.html
     
    12-29-2011, 01:41 PM
  #16
Trained
Never said you were stupid nor was that implied in my post.

Afflicted horses are carriers. They have two copies of the HERDA gene where carrier (non afflicted carriers) only have one.

The math on that site is exactly the same as what Face stated. Carrier to carrier is 25% clear, 50% carrier, and 25% afflicted. Always will be.
     
    12-29-2011, 01:44 PM
  #17
Trained
Assuming this is what you are talking about here -


The Punnett squares are correct. The one on the right, if that is what has you confused, is afflicted (horses with two copies) bred to a non-carrier. That will give you 100% carriers of the disease.

ETA their little thing at the top doesn't match their squares. NH and HH are actually used in reference to HYPP. HERDA is N/HRD or HRD/HRD.
     
    12-29-2011, 01:45 PM
  #18
Banned
That is how I would read it. Afflicted are carriers and also stricken with HERDA.
     
    12-29-2011, 01:46 PM
  #19
Super Moderator
I still read it that way and I still feel that's what you were implying.

That same site shows that a herda horse and a normal horse would be 100% carrier which is why I question the data on that particular site.

I'm asking questions because I don't know answers or I am looking for clarification or even to ensure that what I think is correct, is infact, a true statement.
     
    12-29-2011, 01:47 PM
  #20
Super Moderator
Quote:
Originally Posted by NdAppy    
Assuming this is what you are talking about here -


The Punnett squares are correct. The one on the right, if that is what has you confused, is afflicted (horses with two copies) bred to a non-carrier. That will give you 100% carriers of the disease.

ETA their little thing at the top doesn't match their squares. NH and HH are actually used in reference to HYPP. HERDA is N/HRD or HRD/HRD.
Thank you.

That was my question. So an afflicted horse is both carrier and suffering from the disease where a carrier only carries the gene and will only pass it on partially.

Now I understand.
     

Tags
aqha, carriers, herda, stallions

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Known Carriers of Genetic Disorders farmpony84 Horse Breeds 0 10-19-2010 04:27 PM
water bottle carriers - how do you attach them? Jan Arbo Trail Riding 2 08-10-2010 12:17 AM
Herda FGRanch Horse Breeding 21 04-14-2010 12:01 AM
Herda? FGRanch Horse Health 6 10-05-2008 08:11 PM
HERDA Sara Horse Health 2 08-27-2007 08:26 PM



All times are GMT -4. The time now is 04:31 AM.


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