Re: HYB: Diploid - Tetraploid
- Subject: [iris] Re: HYB: Diploid - Tetraploid
- From: "Neil A Mogensen" n*@charter.net
- Date: Thu, 12 Jun 2003 12:52:03 -0400
- List-archive: <http://www.hort.net/lists/iris/> (Web Archive)
For modern TB sorts, you can safely assume they are all tetraploid. If you
were to go to Lowell Baumunk's catalog or website and look at bearded species,
you can assume they are diploid unless either there is a notation, or you have
information from some source such as *The World of Irises* that says the wild,
collected sort is tetraploid. For example, all the aphylla clones are
tetraploid.
For beardless, the catalogs will usually tell you for Siberian and JI irises.
Very few LI are tetraploid, but they will be described as such as well.
The table iris are usually diploid unless they are from Markham or from Jim
and Vicki Craig, with aphylla ancestry reducing the proportions of TB's and
BB's to table or near-table size but retaining the tetraploid status. Catalog
descriptions often will specify.
In general, tetraploids have larger pollen grains, thicker and heavier stems,
larger flowers, heavier substance and slower growth than a parallel or related
diploid.
I hope this is helpful or useful.
Neil Mogensen z6b/7a near Asheville/Hendersonville, NC (did someone suggest
building an ark?)
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