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nafex - Re: [NAFEX] Useful mutants

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  • From: Michael Dossett <phainopepla@yahoo.com>
  • To: North American Fruit Explorers <nafex@lists.ibiblio.org>
  • Subject: Re: [NAFEX] Useful mutants
  • Date: Wed, 29 Aug 2007 11:22:25 -0700 (PDT)

Many pre-emergent herbicides will also have this same
effect and mechanism. Surflan (oryzalin) is the most
common but Benefin and Trifluralin will as well.

Michael


--- Paul Cabe <CabeP@wlu.edu> wrote:

>
>
> I've read that other flowers are bred from seeds
> exposed to
> colchicine, which damages (changes) the genome.
> Maybe that's used to
>
> create polyploidy, I forget the details.
>
> Ginda
>
> You remember correctly. Colchicine disrupts the
> mitotic spindle
> apparatus, and has long been used to increase ploidy
> levels. Can be
> done to double the chromosome number in a cultivar,
> or sometimes to
> double the chromosomes in a sterile hybrid to make
> it fertile.
> In general, cell size is correlated with
> DNA/chromosome content in the
> nucleus, so more chromosomes often mean bigger
> cells, and by extension,
> bigger fruits, flowers etc. Fruits, having larger
> cells and thus less
> abundant cell walls, may be juicier or more tender.
>
> best,
> Paul Cabe
>
>
> On Aug 28, 2007, at 11:04 PM, S & E Hills wrote:
>
> > I don?t recall the source, but I recall reading
> that new varieties
> > of African Violets were bred using seeds that had
> been taken into
> > space and exposed to solar radiation.
> >
> >
> >
> > Scott Hills
> >
> >
> >
> > From: nafex-bounces@lists.ibiblio.org
> [mailto:nafex-
> > bounces@lists.ibiblio.org] On Behalf Of Brungardt,
> Sam
> > Sent: Tuesday, August 28, 2007 11:08 AM
> > To: North American Fruit Explorers
> > Subject: [NAFEX] Useful Mutants, Bred With
> Radiation (New York
> Times)
> >
> >
> >
> >
> >
> > Some of you may find this story disturbing, but I
> found it
> > interesting and informative even though the writer
> described
> > Japanese pears as a cross between apples and
> pears. -- Sam
> > Brungardt, St. Paul, Minn.
> >
> > Useful Mutants, Bred With Radiation
> > Public fears aside, scientists mimic nature's
> genetic scrambling
> > to bolster fruits and vegetables, as well as beer
> and whiskey.
> >
> >
>
http://www.nytimes.com/2007/08/28/science/28crop.html?th&emc=th
>
> >
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> End of nafex Digest, Vol 55, Issue 61
> *************************************
>
> !SIG:46d4f991168491560781420!
>
>
>
>
>
> Paul R. Cabe, PhD
> Associate Professor of Biology
> Washington and Lee University
> Lexington, VA 24450
> (540)458-8894
> (540)458-8012 (fax)
> > _______________________________________________
> nafex mailing list
> nafex@lists.ibiblio.org
>
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Michael Dossett
Corvallis, Oregon
www.Mdossettphoto.com
phainopepla@yahoo.com



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