Genetics Questions
 
 

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Genetics Questions

This is a discussion on Genetics Questions within the Horse Breeding forums, part of the Horse Breeds, Breeding, and Genetics category
  • Horse colors sobiano
  • White sobiano horses

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    04-16-2012, 01:03 AM
  #1
Foal
Genetics Questions

Ok, So I just bred my APHA mare to a AQHA bay roan stud, When I bought my mare they said she was tested homozygoues. Does that mean that she will for sure throw a colored baby? She is a red roan sobiano with blue eyes. Pretty loud. Oh and this is my first mare in foal! Any tips for me!?!
THANKS Im so excited!
     
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    04-16-2012, 01:11 AM
  #2
Foal
Here is a pic.
Attached Images
File Type: jpg maci.jpg (67.8 KB, 127 views)
     
    04-16-2012, 02:23 AM
  #3
Yearling
I don't think an overo horse can be homozygous for a pattern, but I'm not completely sure. She is a pretty mare!
KennyRogersPaints likes this.
     
    04-16-2012, 02:35 AM
  #4
Started
Unless she is secretly a tobiano, homozygous overo horses die hours upon birth.
lethal white overo horses

But someone else may be able to dispute that with the sabino.. Idk.
     
    04-16-2012, 03:07 AM
  #5
Started
Looking at your mare I can't see she can be homozygous for anything. Not for tobiano pattern or black.Looks like she is Probably a OLWS carrier if anything & bred to another carrier there is a chance of lethal white Or in other words homozygous frame overo.
     
    04-16-2012, 03:29 AM
  #6
Started
She could be homozygous roan... Were both her sire and dam roans?

There are three overo patterns, frame, sabino, and splash. Frame is lethal homozygous, and I believe that sabino and splash1 are both perfectly safe homozygous.
Chiilaa likes this.
     
    04-16-2012, 04:17 AM
  #7
Trained
In terms of white patterns, you were lied to by her owners. She is not tobiano, so can't be homozygous for that. She is probably frame, but can only have one copy of that gene, otherwise she would not be here. She could be homozygous for sabino or splash, but since the test for splash is really new, and there is no good test for sabino, there is no possible way for her previous owners to say she was homozygous or not.

I can tell you something she is homozygous for - red.
NdAppy and Poseidon like this.
     
    04-16-2012, 01:42 PM
  #8
Foal
Ok thank you everyone! Im just curious as to if she will throw any paint spots being bred to a solid bay roan? I guess I will have to wait and see!
     
    04-16-2012, 01:58 PM
  #9
Foal
This is who she is in foal to!
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File Type: jpg steel.jpg (68.2 KB, 96 views)
     
    04-16-2012, 01:58 PM
  #10
Started
Offspring Color Probability

14.58% -Bay Roan Overo
14.58% -Bay Roan
14.58% -Bay Overo
14.58% -Bay
8.33% -Chestnut Roan Overo
8.33% -Chestnut Roan
8.33% -Chestnut Overo
8.33% -Chestnut
2.08% -Blue Roan Overo
2.08% -Blue Roan
2.08% -Black Overo
2.08% -Black
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