Re: Re: CULT: vernalization

Bill Shear wrote:
> 
> >That is really interesting John.  Thanks for sharing.
> >
> >Soo, the FRI gene is damaged in all these rebloomers, but may be damaged
> >in different ways in different ones, plus it sounds like these mutations
> >could theoretically appear in any seedling.
> 
> Whoa, hold on there!  We don't really know if lack of response to
> vernalization is the reason rebloomers rebloom. 

There you go again. Being scientific. Bringing facts into the
discussion.

> The article John pointed
> us to was indeed interesting, but it is a far cry from Arabidopsis (a sort
> of plant "lab rat")

with a conveniently small genome

> to reblooming irises.  As Don Spoon pointed out in a
> recent article, there are a number of candidate explanations for rebloom in
> bearded irises, and one, two, or all of them could be correct in individual
> cases.  Mutant FRI might be the cause of rebloom in some, but not until the
> DNA of rebloomers is checked with the appropriate probes will we know for
> sure.

Factors inducing/allowing bloom seem to include temperature and length
of day, 
in non-trivial combinations.

There is certainly more than a single gene at work. But, as Spock would
say, 
it is "Fascinating."

Gerry
-- 
g*@mediaone.net
Gerry Snyder, AIS Symposium Chair, Region 15 Ass't RVP, JT Chair
Member San Fernando Valley, Southern California Iris Societies
in warm, winterless Los Angeles

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