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Re: Tetraploids in Hosta

Ransom Lydell wrote:
RE:>>I don't know of any test that has "proved" any of those you mentioned, to be tets.

Hi Ran and Hosta enthusiasts,
In "Flow cytometric analysis of DNA content in Hosta reveals ploidy chimeras", Ben Zonneveld and Frank Van Iren, Euphytica 111: 105-110, 2000, Ben records the DNA content found in 84 Hosta cultivars.

The following were listed as Tetraploid:
F. Minuteman
F. Twilight
F. Patriot 3
F. Patriot 4
F. Patriot Green
F. Whirlwind
F. Second Wind
Grand Tiara
ventricosa 'Aureomarginata"
Jolly Green Giant
Little Blue
I would assume that other H. ventricosa may be tetraploid as well, which helps explain why I like it SO MUCH!

In the article, he goes on to state that he would assume H. 'Jolly Green Dwarf' and H. 'Little Blue' are actually aneuploids, primarily due to a lower DNA content and low pollen fertility.  These are conjectures, but seem plausible.

I'd like to know if plants, such as H. Cheatin' Heart, which show a Tetraploid L3 in the roots but diploid L1 in the leaves, could be more easily converted to an all tet version of the plant and I imagine this question has not escaped Dr. Zonneveld.  It seems likely that others will test this through additional attempts at ploidy conversion.   I would like to see H. Cheatin' Heart become more slug resistant and I imagine conversion of the L1 tissues to tetraploid would contribute to the plants ability to resist slugs.

And if Ben is reading this, what is the "F." for in front of Minuteman, etc.?  Fortunei?  Is this still an accepted naming convention?

P.S.  I would imagine there are a NUMBER of other tetraploid Hosta cultivars that simply have not been identified, possibly even H. 'Eagles Nest' and H. 'Oh My Heart' but maybe you could twist Ben's arm and get him to test them.

Hosta la Vista!

Andrew L.

----- Original Message -----
Sent: Monday, March 19, 2001 1:12 PM
Subject: Tetraploids in Hosta
As with Daylilies, I would expect to see some outward manifistation of tetraplodid in such a hosta.  I don't know of any test that has "proved" any of those you mentioned, to be tets.  If they have been tested, By Ben and he can give me the actual facts, I would like to know about it.  I really have to wonder about the first two mentioned .  What charisteristics in those plants would even lead one to suspect they might be tets?  I have two that I also do suspect could be.  Those are Eagles Nest( probably a partial) and Oh My Heart.
 Tony Avent has published a method for inducing Tets in Hosta and states
that There are 3 in existence on the market currently Patriot, Night Before
Christmas and Grand Tiera. He states that this has been confirmed by DR
Zonneveld. I

"Hosta Scholar" Towle
  He He I like that.

Andrew Lietzow
#1 Plantsman at http://hostahaven.com
1250 41st St
Des Moines, IA 50311-2516

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