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#92814 - 11/21/10 04:15 AM Re: whence came lavender [Re: KazJaps]
KazJaps Offline
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Registered: 08/30/02
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Here's the journal paper which includes the sequencing of Is, Id & I.

The Dominant white, Dun and Smoky Color Variants in Chicken Are Associated With Insertion/Deletion Polymorphisms in the PMEL17 Gene (2004)
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1448810/pdf/7995.pdf

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#92815 - 11/21/10 05:53 AM Re: whence came lavender [Re: Wieslaw]
Redcap Online   content
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#92817 - 11/21/10 11:41 AM Re: whence came lavender [Re: Redcap]
Sonoran Silkies Offline
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Registered: 10/09/08
Posts: 345
Loc: Arizona
Id/Id is a light brown, not at all like lavender (or blue). The last two photos show a splash and a couple of blues along with khaki birds.

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#92818 - 11/21/10 03:41 PM Re: whence came lavender [Re: Henk69]
Poultch Offline
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Registered: 01/25/10
Posts: 660
Loc: New Zealand
Originally Posted By: Henk69
Those leghorns have a very untypical shade of lavender imo.

I thought this aswell

Originally Posted By: Henk69
Since leghorns are synonimous with dom.white, you can guess what I am thinking.

but since you mentioned dominant white, I thought of a paint like influence. Could these leghorns be lavender e+ paints???

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#92819 - 11/21/10 05:08 PM Re: whence came lavender [Re: Poultch]
Wieslaw Offline
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In my opinion they look e+ lav to me





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#92820 - 11/21/10 06:18 PM Re: whence came lavender [Re: Wieslaw]
KazJaps Offline
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Registered: 08/30/02
Posts: 2807
Loc: Australia
I'll quickly go through what I find unusual about these Leghorn roosters.



1: - Very uneven shades of lavender on the tails. Usually lav/lav are a more even shade, eg:

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2: - Much darker shade of lavender/blue in the wing bar (& patchy).
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3: - The breast. Once again, not even shades throughout, very patchy.
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4: - The outer view feather shafts seem to be mostly dark, ie not the typical light feathers as required in exhibition lav/lav birds.


They look closer to lav/lav Bl/bl+ lavender/blues, but I don't think genetically they are this.
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I would put my money on another mutation allele of the lav locus (because of wing patches in some, but slightly different phenotype to lav), or lav/lav with unidentified modifiers.


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#92821 - 11/21/10 06:46 PM Re: whence came lavender [Re: KazJaps]
KazJaps Offline
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Registered: 08/30/02
Posts: 2807
Loc: Australia
P.s. - would be easy to test breed for locus.

Smoky Is is dominant over I - Dominant White, in both chick down & adult plumage (ie, only takes one cross). But keeping in mind that another unidentified bluish mutation on the I locus may have a different inheritance mode.

Blue Bl is masked by I - Dominant White, therefore one cross of I/I bl+/bl+ to blue phenotype bird would indicate if blue or smoky (white eumelanin chick if blue Bl (maybe some blue patches in offspring)).

As it was stated that this is a recessive mutation, test Isabel Leghorn to known lav/lav line (eg in Belgians, etc) -if all lavender offspring produced, probably lav or lav locus allele. Then I would test further & see if both phenotypes can be segregated out (& at what ratios, ie see if two alleles).


Edited by KazJaps (11/21/10 07:01 PM)
Edit Reason: clarified Dominant White test bird - I/I bl+/bl+ -ie added bl+/bl+

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#92822 - 11/22/10 12:34 AM Re: whence came lavender [Re: KazJaps]
Henk69 Offline
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Registered: 02/13/06
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Loc: Netherlands
The dutch article mentioned the same (patchy) feather quality problems as in lavender, if I recall correctly (after forgetting it at first wink ).
But the hens could be silvers. Note the dark red near the head; imo looks more like red action on a silver.

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#92823 - 11/22/10 12:38 AM Re: whence came lavender [Re: Sonoran Silkies]
Henk69 Offline
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Registered: 02/13/06
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Loc: Netherlands
Originally Posted By: Sonoran Silkies
I^D/I^D is a light brown, not at all like lavender (or blue). ...


Disagree. Id/Id and lavender look a lot alike, as does platinum.
In your silkies there may be autosomal red or just groundcolor leaking through, plus Fm of course.
No offence, but silkies are bad genetic mules... wink

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#92825 - 11/22/10 03:18 AM Re: whence came lavender [Re: Henk69]
Hen-Gen Online   content
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I'll remember that phrase; 'genetic mules'.

Thanks, KazJaps, for the reference to the paper about the alleles at the i+ locus.
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