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White Oldenburg

Looking at his dam, I wonder if Puchilingui is responsible for this. Are TBs allowed in the Oldenburg registry? http://www.bilder-hochladen.net/files/3vua-5k-jpg.html" onclick="window.open(this.href);return false;

rabbitsfizz Tue, 08/04/2009 - 14:07

OK, thanks, I have not got around to reading them yet...information overload!

lillith Tue, 08/11/2009 - 05:02

DW- simple dominant, so dw dw (for the sake of argument im using these letters to reperesent them) is 'normal', DW dw is white and DW DW is embryonic lethal?

Yes I know how many times we've been through this but I require repeared large print before it gets through.

So any horse carrying DW is white? so is the sire white for this foal? cos the dam looks high sabino roaned to me (assuming she is the buttock behind the foal in the pic) definately not white anyway....

Cos is neither sire or dam is white and foal is then it cant be DW can it? has to be sabino?

RiddleMeThis Tue, 08/11/2009 - 05:16

[quote="lillith"]DW- simple dominant, so dw dw (for the sake of argument im using these letters to reperesent them) is 'normal', DW dw is white and DW DW is embryonic lethal?[/quote] Yes.

[quote]So any horse carrying DW is white? [/quote] Nope. [quote]so is the sire white for this foal? cos the dam looks high sabino roaned to me (assuming she is the buttock behind the foal in the pic) definately not white anyway....

Cos is neither sire or dam is white and foal is then it cant be DW can it? has to be sabino?[/quote]
Dominant White is usually all white. Other times it looks like a loud sabino.

This horse is dominant white.
[img]http://www.blazingcoloursfarm.com/Satoa…]
[img]http://www.blazingcoloursfarm.com/Satoa…]

lillith Tue, 08/11/2009 - 06:26

Simple dominant means like with dun doesnt it, dd - 'normal', Dd - 'dun', DD - 'dun'. The heterozygote and homozygote are the same. Actually wouldnt that mean that al homozygous lethals where incomplete dominants, like LWO nn = not Nn = pigment resitricted NN= pigment completely resticted and nerves affected?

Anyway DW is like a sabino or frame gene in that the expression varies then?

RiddleMeThis Tue, 08/11/2009 - 06:46

[quote="lillith"]Simple dominant means like with dun doesnt it, dd - 'normal', Dd - 'dun', DD - 'dun'. The heterozygote and homozygote are the same.[/quote] Yes. [quote]Actually wouldnt that mean that al homozygous lethals where incomplete dominants, like LWO nn = not Nn = pigment resitricted NN= pigment completely resticted and nerves affected?[/quote] Im not sure. I know that LWO is considered incomplete dominant because the expression is different. But I don't think its related to them being lethal.

[quote]Anyway DW is like a sabino or frame gene in that the expression varies then?[/quote]
Like all of the pinto patterns, yes.

accphotography Tue, 08/11/2009 - 22:08

No DW wouldn't be considered an incomplete dominant because the trait that the gene is influencing is not life or death, it's color. So the dominance in that case we would be looking at two separate traits; the color pattern, the death or no death battle. Because DW always expresses at least somewhat when it is present makes it a simple dominant, unlike frame which can be present with no markings whatsoever.

Dogrose Wed, 08/12/2009 - 04:52

Are there any white spotting genes in horses that also lighten the coat colour?

NZ Appaloosas Wed, 08/12/2009 - 05:21

Define "lighten". Lp can cause black to go a chocolately/bronzy/funky colour.

Diane

Dogrose Wed, 08/12/2009 - 11:30

Any sort of effect really, shading or general paling of the overall colour or roaning. My main interest is in fancy rat colour genetics and there are a few that have specific white markings combined with lightening effects on the coat.

accphotography Wed, 08/12/2009 - 12:35

Not that I can think of (except for LP). However both sabino and dominant white can cause so much roaning it makes the color look funky, but it's not really changing the color, it's just adding white hairs.

Dogrose Wed, 08/12/2009 - 19:00

Cheers! I find analogues interesting (especially the siamese-pointed humans in the paper I found!).

Morgan Wed, 08/12/2009 - 22:25

I'm of the opinion that sabino can lighten areas without actually turning them white.