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#35719 - 05/06/07 05:30 PM What is RI Red Genotype?
Anonymous
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Can anyone tell me what the genotype for RI Red or Black Tailed Red is? Thanks

Also I am wondering if one can take the gene that makes the RI Red color dark red, and add it to a line that is e+/e+ Co/Co s+/s+ (Blk Tailed Buff) to darken them up?? Thanks

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#35720 - 05/06/07 06:09 PM Re: What is RI Red Genotype?
Blackdotte Offline
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Registered: 10/02/04
Posts: 913
Loc: Australia
eWh/eWh s+/+s Ap/Ap Db/Db Mh/Mh plus in exhibition line " rb/rb reccessive black" and Co/Co. The dark red colour is due to a combination of rb/rb & Mh/Mh,this combination has greater effect on eWh,but also works well on eb/eb (Red Sussex).

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#35721 - 05/07/07 11:17 PM Re: What is RI Red Genotype?
Choc Offline
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Registered: 03/10/06
Posts: 489
Loc: England
i thought that was the formula for buff (without rb)

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#35722 - 05/08/07 12:57 AM Re: What is RI Red Genotype?
Blackdotte Offline
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Loc: Australia
Buff is eWh/eWh s+/+s Ap/Ap Db/Db Mh/Mh Di/Di Cb/Cb with possibly Co/Co & I/I.

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#35723 - 05/08/07 10:17 AM Re: What is RI Red Genotype?
Choc Offline
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Registered: 03/10/06
Posts: 489
Loc: England
I'm not certain about the intensifiers or Cb, are they necessary? I certainly haven't got any I in my lines. Mh does not necessarily extend pheo - that is untrue in my opinion - look at CB Partridge (USA) they have perfect Black Breasts and clear Mh.

Only my opinion(s)

choc

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#35724 - 05/08/07 04:59 PM Re: What is RI Red Genotype?
Blackdotte Offline
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Loc: Australia
Cb extends pheo into the tail & wings. Smythe(in Crawford),Okimoto & Reeder sequenced Mh. Okimoto is of the opinion Di also extends pheo into the tail.
Phenotypes can be made on more than one genotype,& this varies from country/breeder/strain .
Above is considered the "classical" genotype. I am sure Buff could be produced with eWh/eWh s+/s+ Ap/Ap
Db/Db Co/Co Di/Di I/?.
Just my opinion.

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#35725 - 05/09/07 04:32 AM Re: What is RI Red Genotype?
Chook-in-Eire Offline
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Registered: 05/20/05
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Loc: Ireland
In my notes, derived mostly from this forum, I have RIR down as
ey/ey, s+, db+/db+, pg+/pg+, ml+/ml+, Co/Co Mh/Mh
It was also written that they are mostly wheaten but can segregate other E-alleles, that they have lots of red intensifiers, and that they may segregate Co.
So the difference to the Buff phenotype would likely be the absence of Db and Di (and Cb).

@Blackdotte, don't want to start another Brian Reeder argument but when did he sequence Mh?

chook

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#35726 - 05/09/07 04:45 AM Re: What is RI Red Genotype?
Hen-Gen Online   content
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Which leads me to ask a question. Is it generally reckoned that the ey allele exists?
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If you have nothing............
......... give it away!

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#35727 - 05/09/07 05:20 AM Re: What is RI Red Genotype?
Mau Offline
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Registered: 03/30/06
Posts: 650
Loc: United Kingdom
Carefoot's work lead him to believe it didn't but genrally it is thought ey exists. I'm not sure what the supposed difference is and how it is different in various combinations.
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Mau

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#35728 - 05/09/07 11:41 PM Re: What is RI Red Genotype?
Blackdotte Offline
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Registered: 10/02/04
Posts: 913
Loc: Australia
Chook ,A few years ago ,done by Ron O when he was still lecturing at Uni,for BR.
Hen-gen & Mau, latest work supports Carefoot,that there is only one Wheaten, but that it is dominant to e+ when no melanisers are present,& reccessive to eb when in conjunction with melanizers.
RIR have "reccessive black" melanizers,and New Hampshires do not.

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