The Colors of Life

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Dilutions Discussion on the dog forum

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Daylene Alford
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Dilutions Discussion on the dog forum
If anyone wants to jump over there and express an opinion that would be great! http://canine.colorgenetics.info/content/brown-liver-classified-dilution sorry I had edited the title on the thread so the link was broken. Its fixed now ymwhisle
Daylene Alford
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Does anyone know where I

Does anyone know where I could find an actual definition of dilution as it applies to coat color?

Monsterpony
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Hmmm, I don't know if there

Hmmm, I don't know if there is a concrete one. My own definition is that if the pigment in the hair shaft is the same, but it is changed in a way to lighten the coat, then it is a dilution. For example, creme puts less pigment (either eu or pheo). Dun moves the pigment to one side of the hair shaft, creating a lighter appearance. Both of those I would call dilution. Modifiers, on the other hand, change the actually pigment present in the hair shaft such as switching from eu to pheo (agouti).

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Daylene Alford
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So how would you classify

So how would you classify brown? It modifies the pigment shape so that it appears lighter.

The gene apparently codes for one of the proteins that makes up the eumelanin pigment granule, so the bb granules are smaller and rounder in shape as well as appearing a lighter color than those of a dog carrying B.

From http://bowlingsite.mcf.com/genetics/colo...

There's some interesting discussion that gone on in the thread here
http://canine.colorgenetics.info/content...

Monsterpony
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I'd personally call it a

I'd personally call it a modifier because it is more like a different pigment, but I could understand the dilution argument.

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Daylene Alford
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I've given this alot of

I've given this alot of though and I think I'm going to go with the dilution route. I think its going to be easier for a newbie to understand. This is the defintion I'm going to use.

Dilution: a genetic mutation that decreases the visual intensity of pigment in the coat and/or skin.

I probably could avoid the whole argument though if I just put diltuions and modifiers on the same page :-?

pandemonium