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English Blue   Message List  
Reply | Forward Message #5075 of 5217 |
RE: [sheep-color-genetics] English Blue

Linda wrote;

> She looked just like a solid black, except for the small white tear ducts.
> I will put a picture of her in the files, "One of the Shetland Mule Ewe
> Lambs". The dam of this minimal AebAa is a solid AaAa with almost no white
> fibres at 6 years of age. The sire shows the full Aeb pattern. So I expect
> there may be more at work than just Agouti.
>
>
Hi Linda,
fascinating as you say! and works for me.

Here's a mad thought.In solid sheep, whatever is at work could be responsible
for the incremental colour variance in sheep who carry the colour modified gene.
In other words. The incremental changes in colour ( some are more intense some
less) you see in modified sheep is not directly due to the colour modifed gene
itself but due to something else at work? That would depend of course on
beliveing an incremental allele somewhere else being possible.............

Renée



Sat Jul 11, 2009 6:31 am

canicanine
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Message #5075 of 5217 |
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Hi Laurelen and Maggie: Thanks for your thoughts. The reason I asked has to do with the Agouti hierarchy and the idea of dominance. Both the top and the...
Linda Wendelboe
lindawendelboe
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Jul 10, 2009
6:08 am

Linda wrote; ... Hi Linda, fascinating as you say! and works for me. Here's a mad thought.In solid sheep, whatever is at work could be responsible for the...
canicanine@...
canicanine
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Jul 11, 2009
6:32 am

Hi Renee: Yes, I think that the range of intensity of colour in both the regular colours and the modified ones may be caused by the interaction of other genes....
Linda Wendelboe
lindawendelboe
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Jul 11, 2009
8:33 pm

... Hi Linda, and so a very " strong" self black with an Aeb might produce a black lamb which in other breeding combinations may prove to be "dominant black"?...
canicanine@...
canicanine
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Jul 12, 2009
10:27 am

Hi Renee: I think dominant black is quite a different thing than what Maggie has termed strong self, at least the way I understand it. I think with strong self...
Linda Wendelboe
lindawendelboe
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Jul 12, 2009
12:16 pm

Hi Linda, ... there would be no change at agouti. It would still be AaAa, your strong self black AaAa has an additional modifier ( lets call it that for the...
canicanine@...
canicanine
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Jul 12, 2009
3:12 pm

Hi Renee: Maybe I was confused about your previous email. I thought you were equating strong self to Extension D. I agree, it seems possible that there is a...
Linda Wendelboe
lindawendelboe
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Jul 12, 2009
3:38 pm

Hi Linda, ... were equating ... No I'm equating "strong" to be an incremental modifier it would only become dominant if it obscured (was dominant to ) an...
canicanine@...
canicanine
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Jul 12, 2009
7:10 pm

Hi Renee: I should perhaps also say that my experience is that with Ext. D, it is an all or nothing thing. It doesn't creep up through a number of...
Linda Wendelboe
lindawendelboe
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Jul 12, 2009
3:44 pm

Hi Linda, for now lets just use the terms modifier for a strong ( intense) modifier and dominant to refer to obscuring an agouti pattern. To take your Aeb...
canicanine@...
canicanine
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Jul 12, 2009
8:15 pm

Linda, Do you think that some of the English Blue that are dark and have small tears are heterozygous, while the ones that have large tears and saddle, ...
jabbourl@...
jabbourl
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Jul 11, 2009
1:08 am

Hi Laurelen: I have assumed that the tears are an integral part of the pattern. Not sure about the ear rims, etc. and moustache as the "minimal" ewe does not...
Linda Wendelboe
lindawendelboe
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Jul 11, 2009
2:38 am

Dear Linda, I agree all you have stated. White tears ARE definitive of the english blue pattern. Rimmed ears, moustache etc. are, many times, the first things...
Tawanda Farms
cpasheilich
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Jul 11, 2009
5:29 am

Hi Maggie , you wrote, ... can you explain what you mean by a "strong" self? many thanks Renée...
canicanine@...
canicanine
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Jul 11, 2009
6:12 am

Hi Maggie: No problem with the length of the response. I appreciate the time you take to state things clearly. Yes, the minimal ewe is AebAa out of what I...
Linda Wendelboe
lindawendelboe
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Jul 11, 2009
1:52 pm

The term "strong self" is just my own verbal expression of color experience at my farm. It seems that, for any given agouti pattern, family lines will have...
Tawanda Farms
cpasheilich
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Jul 11, 2009
3:46 pm

Thank you, Linda. You are correct. The agouti genes and the extension genes are quite different. And they exist on 2 separate chromosomes, to boot! I...
Tawanda Farms
cpasheilich
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Jul 12, 2009
3:48 pm
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