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Re: RE: Analysis of MV's sedlings

  • Subject: Re: [iris-photos] RE: Analysis of MV's sedlings
  • From: "Kathleen Devlin" iris@dancingmeadows.com
  • Date: Fri, 14 Jan 2005 20:45:21 -0500

Please keep this discussion on the forum.  I don't know if I'll be able to follow all of it, but I'd like to try.
 
Kathy
Milan, MI
Zone 5
 
----- Original Message -----
Sent: Friday, January 14, 2005 12:58 PM
Subject: Re: [iris-photos] RE: Analysis of MV's sedlings

Chuck wrote: "If there are enough people interested I'll proceed from here."

I'm certainly am most interested Chuck. If no one else is interested in
this, would you consider proceeding with the analysis via my personal
E-mail?  I'm dying to know.  :-)

Margie V.
Oro Valley, AZ.
Zone 8/9
IrisLady@comcast.net


----- Original Message -----
From: <irischapman@netscape.net>
To: <iris-photos@yahoogroups.com>
Sent: Friday, January 14, 2005 7:10 AM
Subject: [iris-photos] RE: Analysis of MV's sedlings


>
> MV's seedlings from this cross are very varied and I'll try to go through
> a process of analying them if people are interested.
> What I have done as first step is to create a folder with photos only of
> these  seedlings and the parents and grandparents. Each of the seedling
> photos has been renamed with the reference numbers of 1 to 14 with the
> first seedling (stripped seedling) named "first". Giving 15 seedlings
> total from this cross.
> With this much variation it would be nice to have even more seedlings, but
> we will work with what we have and see what we get.
>
> First re recessives We have a number of Scenarios.
>
> 4 recessives x 2 recessives  gives 1 out of 6 offsprings have 4 recessive
> genes
> 4 recessives  x 3 recessives  gives 1/2 seedlings with 4 recessive genes
>
> 4 recessives x 4 recessives gives all seedlings recessives
> 2 recessives x 2 recessives gives 1 out of 36 seedlings with 4 recessive
> genes.
> 2 recessive genes x 3 recessive genes gives 1 out of 12
> 3 recessive x 3 recessive gives 1 out of 4
>
> Also, and here is the kicker 1 recessive X 2 recessive can give as high as
> 1 out of 100 with 4 recessives. This depends on the distence of the gene
> from the centrenome plus a couple of other variables. See  "Tetrraploid
> Genetics"WOI pg 394-397. This fact also can influence the other frequences
> somewhat.  The ratio of one out of 100 seems to be true with the plicata
> genes. It can be much lower. What this means is that one example of a
> recessive expression does not by itself mean that one parent has two
> recessives but does guarantee it has at least one.
>
> If there are enough people interested I'll proceed from here.
>
> Chuck Chapman
>
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