Color ? on greys

farmin_n_ky · 08-11-2008, 12:05 PM

My stud colt (grey) is out of a grey sire (solid colored, was born black and stayed that way for years) and a grey dam (flea bitten). What are his (the stud colt) chances of being homozogus (sp) grey?

cowgirlspurs · 08-11-2008, 12:09 PM

50/50 chance of him being homozygous.
Either both parents threw their gene or only one did-only testing will tell.

farmin_n_ky · 08-11-2008, 12:31 PM

Where is the best place to send hairs to be tested? Also how expensive is it?

**Orchid** · 08-11-2008, 12:34 PM

Actually, unless one or both parent(s) was homozygous grey, he has a 25% chance of being homozygous grey. Unles I am having a brain fart Monday...

**Diamond_Y** · 08-11-2008, 12:37 PM

I've always used UCDavis for testing, but I don't believe they offer a test for grey.

Here's their website: http://www.vgl.ucdavis.edu/services/horse.php

ToveroMom · 08-11-2008, 12:47 PM

I do not believe there is a test for homo grey.

DoBeSassy · 08-11-2008, 01:33 PM

assuming both were hetero for grey

25% homo grey
50% hetero grey

if one was hetero and one was homo

50% homo
50% hetero

if bother were homo

100% homo

Faceman · 08-11-2008, 02:02 PM

Quote:

Originally Posted by Orchid

Actually, unless one or both parent(s) was homozygous grey, he has a 25% chance of being homozygous grey. Unles I am having a brain fart Monday...

No brain fart - 25% is correct...

grannycowgirl · 08-11-2008, 02:08 PM

I'm not very knowledgeable in genetics but I thought of this article I saw recently.

An international team led by researchers at Uppsala University in Sweden has identified the genetic mutation that makes gray horses turn gray. They have also shown that these horses carry an identical mutation that can be traced back to a common ancestor that lived thousands of years ago.

http://www.thehorse.com/ViewArticle.aspx?ID=12468

Bandit · 08-11-2008, 07:19 PM

If we didn't know what color the colt was yet - then yes, it would be 25% homozygous, 50% heterozygous, and 25% colored (assuming each parent is heterozygous).

However, since we already know the colt is grey from the first post - we know he has one grey gene for sure. So the original poster is correct - 50% chance he inherited the 2nd grey gene from the other parent unless one was homozygous - then that % chance goes up a bit.

Wolfie · 08-12-2008, 12:35 AM

Interesting, grannycowgirl, thanks!

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08-11-2008, 12:05 PM
farmin_n_ky Halter broke Join Date: Jan 2008 Location: Horse Cave, KY Posts: 89	Color ? on greys My stud colt (grey) is out of a grey sire (solid colored, was born black and stayed that way for years) and a grey dam (flea bitten). What are his (the stud colt) chances of being homozogus (sp) grey?

08-11-2008, 12:09 PM
cowgirlspurs Long Yearling Join Date: Jun 2006 Location: Washago/Severn Bridge Ontario Posts: 1,423	50/50 chance of him being homozygous. Either both parents threw their gene or only one did-only testing will tell. __________________ Fufill your fantasies...FG Fantasy Fella

08-11-2008, 12:31 PM
farmin_n_ky Halter broke Join Date: Jan 2008 Location: Horse Cave, KY Posts: 89	Where is the best place to send hairs to be tested? Also how expensive is it?

08-11-2008, 12:34 PM
Orchid Super Moderator Join Date: Feb 2005 Location: Minnesota Posts: 9,805	Actually, unless one or both parent(s) was homozygous grey, he has a 25% chance of being homozygous grey. Unles I am having a brain fart Monday... __________________ Be thankful.

08-11-2008, 12:37 PM
Diamond_Y Administrator Join Date: Feb 2006 Location: North Texas Posts: 3,624	I've always used UCDavis for testing, but I don't believe they offer a test for grey. Here's their website: http://www.vgl.ucdavis.edu/services/horse.php __________________ Diamond Y Quarter Horses - Breeders of Quality Foundation Quarter Horses Home of King of Cooke County, 2004 Perlino son of Cooke County ETC

08-11-2008, 12:47 PM
ToveroMom Pasture Pet Join Date: Jan 2005 Location: Cleveland TX Posts: 15,296	I do not believe there is a test for homo grey. __________________ "In America,anyone can be President. That is one of the chances you take" Adlai Stevenson

08-11-2008, 01:33 PM
DoBeSassy Seasoned Join Date: Apr 2007 Location: Texas Posts: 4,927	assuming both were hetero for grey 25% homo grey 50% hetero grey if one was hetero and one was homo 50% homo 50% hetero if bother were homo 100% homo __________________ There is none so blind as she who will not see

08-11-2008, 02:08 PM
grannycowgirl Weanling Member Join Date: Sep 2007 Location: southern U.S. Posts: 239	I'm not very knowledgeable in genetics but I thought of this article I saw recently. An international team led by researchers at Uppsala University in Sweden has identified the genetic mutation that makes gray horses turn gray. They have also shown that these horses carry an identical mutation that can be traced back to a common ancestor that lived thousands of years ago. http://www.thehorse.com/ViewArticle.aspx?ID=12468 __________________ If you find some happiness inside yourself, you'll start finding it in a lot of other places, too. www.simplykonawhim.etsy.com

08-11-2008, 07:19 PM
Bandit Coming two Join Date: Aug 2007 Location: Central Kentucky Posts: 1,787	If we didn't know what color the colt was yet - then yes, it would be 25% homozygous, 50% heterozygous, and 25% colored (assuming each parent is heterozygous). However, since we already know the colt is grey from the first post - we know he has one grey gene for sure. So the original poster is correct - 50% chance he inherited the 2nd grey gene from the other parent unless one was homozygous - then that % chance goes up a bit. __________________

08-12-2008, 12:35 AM
Wolfie Coming two Join Date: Apr 2008 Location: US Posts: 1,547	Interesting, grannycowgirl, thanks!