HYB: Tetraploidy
- To:
- Subject: HYB: Tetraploidy
- From: J* a* C* W*
- Date: Tue, 18 Jul 2000 07:53:11 -0600
> From: rdhager@dmv.com
> Jeff,
> Now that you've brought the subject up, was tetraploidy in TB's induced
> by human intervention as it has been with daylilies, Sibs and JI, or did
> it occur naturally? Since most bearded irises are tetraploid, how did
> they get that way.
Dennis,
All that I might add to what Sharon McAllister has already posted on this
subject is that there are also a number of naturally occurring forms of
tetraploid dwarf and median iris from southern and central Europe, such as
Germanica, Kochii, I. croatica, I. pumila, I. reichenbachii (syn.,
balkana), and I. varbossiana.
As Sharon mentioned, the naturally tetraploid TBs were all found in
southwestern Asia, not in Europe, but their actual origin remains something
of a mystery, as I understand that the situations in which they were found
growing did not have the ecological characteristics that would be expected
of native wild flowers.
Jeff Walters in northern Utah (USDA Zone 4/5, Sunset Zone 2, AHS Zone 7)
jcwalters@bridgernet.com
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