Lethal White positive

[stormo41]

ok so I think I know what "Lethal White" is please correct me if I'm wrong. To my understanding a Lethal White foal is a foal born of two pinto parents who is all white and has a problem with the rectum or something is missing or not long enough so the foal can not poop and therefor dies.

Even if the mare is not leathal white+ would the foal have the gean from it's father and also be a carrier of it? and what about breeding a leathal white+ mare to a non+ stallion would that foal be a leathal white? and if not could get get the gean from it's mom?

The only reason I know what leathal white is, is because I once rode at a small barn with my cosuin for a while and the owner had pintos and used to breed them and she said once they had a leathal white foal, but that was a long time ago and I don't remember all the details and I was to young to know about genitics and all that fun stuff.

I don't think two leathal white+ horses should be breed together ever. And if the genitc is passed on to the foal from either + parent even if only parent tested + then I would not breed the + horse. No matter how nice of a temperment the horse has or if they have flawless conformation to me when I hear "Leathal White" I think "thats not a good thing". but please correct me if I'm wrong.

 

[jbrat]

Thanks for the link, Now I understand! Alot of things to be-aware of when breeding!

 

[Becky]

Hi Stormo41,

It's been explained pretty well, but ALL frame overos are LWO positive! You can't have a frame overo without it carrying the LWO gene. The only harm in this gene is if two positive horses are bred together and the resulting foal is homozygous LWO (25%) chance. That foal will die due to an incomplete intestine.

So the bottom line is that you don't want to breed two together, but myself and other breeders will keep breeding those beautiful heterozygous frame overos!

 

[Tapestry Minis]

To my understanding a Lethal White foal is a foal born of two pinto parents

Please understand that it's not just because the horse is a "pinto/paint" Tobianos are "pintos/paints" but unless it carries the LWO gene (actually making it a Tovero...but that's a whole nother can of worms....LOL) and then that carrier is bred to another carrier and both of them throw the LWO copy is when you get a resulting All White foal with an incomplete intestine which would cause the foal to die of compaction or colic.

A LWO+ horse has one copy of the gene.

 

[Lewella]

I don't think two leathal white+ horses should be breed together ever. And if the genitc is passed on to the foal from either + parent even if only parent tested + then I would not breed the + horse. No matter how nice of a temperment the horse has or if they have flawless conformation to me when I hear "Leathal White" I think "thats not a good thing". but please correct me if I'm wrong.

No, two lethal white positive individuals should never be bred together.

There is absolutely nothing wrong with a horse that is heterozygous for the Frame pattern - that horse is a lethal white positive individual. Many mammals have genes that are lethal when homozygous (meaning a copy has been inherited from both parents). Animals that are heterozygous (only have one copy) for the gene that creates a lethal condition when homozygous are just fine.

If you are breeding for the Frame pattern Lethal White Positive is ia very GOOD thing! Without it, you have no Frame pattern.

Okay now to terms - OLWS stands for Overo Lethal White Syndrome. This is what lethal white was originally called before there were any tests or any understanding of what caused it. LWO means Lethal White Overo and is usually used to describe just the foals who are born homozygous for Frame - they are Lethal White Overos.

 

[PrestigeMiniHorses]

Should I have my lil stallion tested then?? He's been classified as a Tobiano.....

Sam Hill Flutes Rhythm N Rhyme

Edited Because I thought I might say His dam is a grey and white also...Sire was a black...

 

[Loren&Rocky]

Should I have my lil stallion tested then?? He's been classified as a Tobiano.....

Sam Hill Flutes Rhythm N Rhyme

Edited Because I thought I might say His dam is a grey and white also...Sire was a black...

As far as I know, tobianos don't carry LWO gene. I could be wrong about that though.

:

 

[Meavey]

A tobiano could carry LWO, (only if one of the parents had LWO), ussually it´s obvious by the color (blue eyes and wild markings are a good sign), and called tovero, but sometimes it´s hard to see, or cannot be seen at all, some frame horses are completely solid.

Splash can also make blue eyes to that´s not always a sign either.

A friend of mine had her tobiano horse tested, and it was postitive but didn´t showed in color at all!

He has a solid head and just regular tobiano markings, he is a Rowdy grandson, so that shows how easy it could hide.

If your tobiano horse has no overo predigree or horses with blue eyes and wild markings I would doubt he has LWO.

But if you will breed him to LWO positive mares, just do the test to make sure, as sais it´s just $25.

 

[RobinRTrueJoy]

My Boogerman son is LWO+ I have had most of my mares tested. Fortunatley they are alll negative. IF by chance some came up +, I would sell my stallion even though I am crazy over him. I wouldn't chance losing a baby to try for color. It is too heartbreaking for me and the mare. and its plain just wrong. I wish he wasn't LWO+ actually.

 

[PrestigeMiniHorses]

My boy's dam is a tobiano too and she's out of a grey stallion and the mare's color isnt listed...But her name is Christups Princess. They grey stallion is Komokos Fancy Pants and hes out of Komokos Little Husseler and Komokos Buttons...I dont know if that helps any. I know his dam isnt LWO +. They both dont have blue eyes and they dont have really any markings that stand out from any other Pinto..I think when the incom taxes come back I will have to have him tested..