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Re: HYB: William Mohr Giant--an amphidiploid?

  • Subject: Re: [iris-photos] HYB: William Mohr Giant--an amphidiploid?
  • From: Robt R Pries rpries@sbcglobal.net
  • Date: Wed, 3 Dec 2003 14:58:11 -0800 (PST)

I asked a geneticist colleague and he noted:
environmental conditions -- early frost, for example
-- can interrupt mitosis at the spindle stage. The
cell has already doubled its chromosomes, but is
prevented from splitting itself, so it ends up a

Neil A Mogensen <neilm@charter.net> wrote:
My statement, --"This not exactly what does occur in the colchicine and Oryzalin (Surflan) treatments, methods for which are published for use with tiny seedlings.  The doubling occurs due to a disturbance during meiosis, not mitosis"-- is an incorrect statement.
The chromosome doubling due to colchicine and the herbicides noted is a result of a disturbance of mitosis.
Neil Mogensen

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