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RE: CalSibe fertile tetraploids

Thank you for the citation.  Do you know if Mr. Tamberg sell any of his
cultivars? or how he might be contacted?
Thanks Tim Hall

>-----Original Message-----
>From:	Jeff and Carolyn Walters [SMTP:cwalters@digitalpla.net]
>Sent:	Thursday, February 19, 1998 9:10 AM
>To:	Multiple recipients of list
>Subject:	Re: CalSibe fertile tetraploids
>Here is a direct quotation from Currier McEwen's "The Siberian Iris":
>"In 1976 Tomas Tamberg of Berlin, Germany treated sterile diploid seedlings
>from a cross of his 40 chromosome Siberian iris 'Berliner Riesen' by Iris
>fernaldi of the series Californicae with colchicine. Three seedlings were
>converted to the polyploid state and proved fertile when crossed with each
>other (Tamberg, 1990). . . Tamberg has continued this line of breeding with
>fertile Calsibe seedlings, and many beautiful flowers of this type have
>been achieved (Plate 35). The tetraploid Calsibes are fertile with each
>other, producing fetile tetraploid seedlings. They also backcross
>successfully with 40 chromosome Siberians and with tetraploid Californicae,
>but the resulting seedlings are sterile . . ."
>(The citiation in the text above is to Tamberg, T. 1990. Approaches to
>hybridizing. British Iris Society 1990 Yearbook: 77-82).
>Jeff Walters in northern Utah  (USDA Zone 4, Sunset Zone 2)
>> From: Bill Shear <BILLS@hsc.edu>
>> To: Multiple recipients of list <iris-l@rt66.com>
>> Subject: Re:  CalSibe sources
>> Date: Thursday, February 19, 1998 7:42 AM
>> >"Tomas Tamberg is working with polyploid state and it has proved
>> > Calsibes are fertile/each other, producing fertile tetraploid
>seedlings. But
>> >Tamberg has very ratrely obtained a viable seed from such crosses but
>> >seedlings grow vigorously but sterile."
>> Huh? Say again?
>> Bill Shear
>> Department of Biology
>> Hampden-Sydney College
>> Hampden-Sydney VA 23943
>> (804)223-6172
>> FAX (804)223-6374
>> email<bills@hsc.edu>

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