RE: Re :Re: HYB: Paltec

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You can see a picture of PALTEC at
http://www.iriscitygardens.com/images/other/paltec.jpg. Macey and I are very
fond of I. tectorum plants and grow PALTEC, I. tectorum, I. tectorum alba,
WOOLONG, FRECKLETEC and I. tectorum variegated, and sure would like to add
to our collection if there are more out there.

Greg McCullough
Iris City Gardens
Primm Springs Tennessee, USA (just southwest of Nashville)
Zone 6

> -----Original Message-----
> From: jérôme Boulon [j*@wanadoo.fr]
> Sent: Tuesday, September 19, 2000 4:06 PM
> To: iris-talk@egroups.com
> Subject: Re :Re: [iris-talk] HYB: Paltec
>
>
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> I just reading your answer Sharon, very informative !
> If any member of iris-talk take a PALTEC photo, please post
> it urgently...
>
> Jérôme
> from France zone 7
>
> ----- Message d'origine -----
> De : Sharon McAllister <73372.1745@compuserve.com>
> À : <iris-talk@egroups.com>
> Envoyé : mardi 19 septembre 2000 21:12
> Objet : [iris-talk] HYB: Paltec
>
>
> >
> > Message text written by Dennis Kramb:
> >
> > >
> > Is Paltec totally sterile?  Is it diploid?  I just received
> a piece of it
> > and started wondering if I could use it in my hybridizing efforts.
> > <
> >
> > The easy question first:  PALTEC is a 26-chromosome diploid.
> >
> > Whether you use it really depends on your basic approach to
> hybridizing --
> > so, for the benefit of any newcomers who may share your
> curiousity, I'm
> > going to digress a bit in answering that part of the question.
> >
> > At one extreme is the hybridizer who wants to be able to
> cross any two
> > breeders with  the expectation of a reasonable number of
> seedlings of
> > predictable type.   Many have followed this proven path to
> success.  To
> > join them, you must limit your breeding stock to members of the same
> > fertile family.  They would tell you to forget about PALTEC
> and I would
> > agree completely, IF this were the approach you had chosen.
> >
> > At the other extreme is the experimenter who is more interested in
> > information than introductions.  Not only is this the "path less
> traveled",
> > but the iris world may remain completely unaware of them.
> Tom and Wiloh
> > Wilkes are an exception that quickly come to mind.  They
> did introduce a
> > few iris, but their significant contribution was a combination of
> > information and breeding stock. They made a lot of crosses
> exploring the
> > origin and future possibilities of the C. G. White amphidiploidlike
> > hybrids.  Wiloh corresponded with many hybridizers and freely shared
> > seedlings, as evidenced by the frequency these appear in registered
> > pedigrees.  Tom wrote  technical articles for both AIS and ASI
> > publications.  PALTEC is just the type of subject that such
> experimenters
> > relish!
> >
> >
> > Now, should you choose to take up the challenge....
> >
> > Purge the word "sterile" from your vocabulary.  Fertility
> is relative.
> > PALTEC is an interspecies diploid, like WILLIAM MOHR but
> with different
> > ancestry.  Consider how long WILLIAM MOHR was dismissed as
> "sterile" and
> > then look at the long list of offspring that were produced after
> compatible
> > mates were discovered.  PALTEC's current position is much
> like that of
> > WILLIAM MOHR until the late 1940s -- except that, according
> to TWOI, it is
> > probably the sole survivor of its type.
> >
> > We have the advantage now, though, of knowing more about chromosome
> > conjugation and that means we can confidently map out an
> experimental
> > program for it.
> >
> > 1.      Cross PALTEC  with tetraploid beardeds.  This is
> most likely to
> > produce BBB- or BBT-type triploids, but can sometimes
> produce a BBBT-type
> > tetraploid.  Cull the BBBs by selecting for tectorum
> characteristics.
> >
> > 2.      Cross F1 seedlings back to PALTEC.  It's a long shot, but
> > unbalanced diploids do sometimes produce unreduced gametes
> and an F1's
> > BT-type gametes are the right type to fertilize an
> unreduced gamete and
> > thus produce a fully fertile amphidiploid in the second generation.
> >
> > 3.      Cross F1 seedlings among themselves.  Not quite as
> much of a long
> > shot, but among all the non-viable combinations is the BT +
> BT, so this is
> > another way to get a fully fertile half tectorum in the
> second generation.
> >
> > 4.      Cross F1 seedlings with tetraploid beardeds to
> widen the bearded
> > portion of the gene pool.  Again, cull any BBB- or
> BBBB-types by selecting
> > for tectorum characteristics.
> >
> > What we can NOT predict is how long it will take to get any
> F1 seedlings
> at
> > all, or any F2 seedlings -- much less when the fertility
> barrier might be
> > broken.   But you can certainly have some fun along the way.
> >
> > Sharon McAllister
> > 73372.1745@compuserve.com
> >
> >
> >
>
>
>
>
>
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