Final conclusion on mit rec

Bill 
read this from Marcotrigiano He clearly states that mitotic 
recombination is not uncommon
Asked specifically about mit rec he agreed too!
So I am happy to move on as long as it is clear now 
1.That Marcotrigiano , based on the results of crosses I provided 
concludes that it is a nuclear character. 2. That Marcotrigiano 
agrees that mit rec is not uncommon and he agreed on mit rec ( = 
(somatic)crossing over) as an explanation for a green edge 
appearing in a yellow plant.
From:           	"Michael Marcotrigiano" 
<mmarcotr@email.smith.edu>
To:             	<zonneveld@RULBIM.Leidenuniv.nl>
Subject:        	Re: codominant, yellow leaved hostas

As you can see by my response I DID say that on a yellow 
background leaf it is possible that crossing over yields variegation. I 
am surprised that we do not see 'twin spots' on a regular basis with 
yellow hosta since somatic crossing over is not that uncommon.

Bens response :  I also tried to explain to them that mitotic 
recombination is the most likely explanation for a  sport with a 
green edge and a yellow center, originating in a fully yellow plant. 
Do you agree on this too?

I'd tend to agree with you. Unless it started out mosaic with a 
mottled yellow and green leaf and later sorted out to marginal. 
Then, it could still be a plastid mutation to yellow plastid. The best 
way to tell of course is with detailed inheritance studies.
( Ben: As I have done by making several thousand crosses a year)
Ben J.M.Zonneveld
Clusius lab pobox 9505
2300 RA Leiden
The Netherlands
mintemp-16C(5F)
Zonneveld@RULbim.LeidenUniv.NL
Fax: 31-71-5274999
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