Re: HYB: William Mohr Giant--an amphidiploid?
- Subject: Re: [iris-photos] HYB: William Mohr Giant--an amphidiploid?
- From: Robt R Pries r*@sbcglobal.net
- Date: Wed, 3 Dec 2003 14:58:11 -0800 (PST)
I asked a geneticist colleague and he noted:
"Various
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
tetraploid."
Neil A Mogensen <neilm@charter.net> wrote:
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
tetraploid."
Neil A Mogensen <neilm@charter.net> wrote:
A CORRECTION--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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