Re: HYB: Tetraploid I. suaveolens

Hmm... I also thought about working with Oryzalin. It works well with
lilies, daylilies and roses, but the iris seedlings I tried as well as black
currant and gooseberry seedlings seem to be totally unaffected by Oryzalin (even in
the highest concentrations), so in this case we have to use the much more
harmfull Colchicine.

My 2 cents
Martin

> Martin,  I have not heard of anyone developing a tetraploid form of
> *suaveolens/mellita*, but I think such would be very useful.  Crossed with
> *pumila,* for instance, it could produce some very small "SDB" types that
> would probably fall into the MDB category.  There are a lot of folks who
> would
> be very interested in such a hybrid.
> 
> There are brief descriptions of techniques for use of colchicine with
> adult
> plants and well as tiny seedlings for chormosome doubling.  I would expect
> the
> Oryzalin/Treflan/Surflan use would give similar results as the colchicine,
> but
> have no idea what the dilution needs to be.  The article, which I believe
> I
> sent you, from Kevin Vaughn about his use of these herbicides with other
> materials is a good starting point.
> 
> You might try an online search for technical research papers concerning
> both
> these chemical families used for inducing polyploidy.  Something might
> surface
> that would give you some help.
> 
> Another source of very valuable information might be Dr. Tamburg in
> Germany.
> Thomas Tamburg has a Berlin address, and has been working with Siberian
> irises
> for a number of years.  A number of his tetraploids are on the market. 
> His
> address is listed in the back of the Check List 1999.
> 
> Yet another source would be to get in contact with someone from the Median
> Iris Society.  Rita Gormley, who is on Iris-talk, is a potential contact
> person who could put you in touch with someone who could answer your
> question
> about *suaveolens* I think.
> 
> SIGNA is another source.  You should be able to find an on-line address
> for
> them.  I don't believe I have it on file, but am fairly sure it exists.  A
> search engine such as google.com should surface their site quickly.
> 
> Best of luck to you in this venture!  I for one, and I doubt I am alone in
> this, will be waiting to hear your results.
> 
> Neil Mogensen z 7, western NC, USA
> 
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