Anton Doroszenko
CAB International
AU: Dale, P. J.\ McPartlan, H. C.\ Parkinson, R.\ Scheffler, J. A.
TI: Gene dispersal from transgenic plants.
CT: Annual report 1992, AFRC Institute of Plant Science Research, Cambridge
Laboratory, John Innes Institute, Nitrogen Fixation Laboratory
and
Sainsbury Laboratory.
PB: Norwich, UK
YR: 1993
PP: 9-11
AA: Cambridge Laboratory, John Innes Centre, Norwich Research Park, Colney,
Norwich NR4 7UH, UK.
AB: Potential outcrossing in the field between genetically engineered rape
(cv. Westar) carrying the bar gene conferring resistance to the
herbicide glufosinate and non-transgenic herbicide-sensitive
plants
was studied using an experimental design in which a 9 m diameter
circle of transgenic plants was surrounded by 1 ha of sensitive
rape plants. Progeny were collected at various distances from the
transgenic nucleus of plants. At 1 and 3 m from the edge of the
transgenic plot, estimated outcrossing rates were 1.4 and 0.4%,
respectively, decreasing to 0.00034% at a distance of 12 m.
Similar
experiments studying cross pollination between potato and its
weedy
relatives Solanum nigrum and S. dulcamara using the NptII gene
(kanamycin resistance) and GUS showed no evidence of outcrossing,
whilst an experiment involving transgenic and non-transgenic
potatoes revealed 24% outcrossing between adjacent rows,
decreasing
to 0.017% at 10 m and no outcrossing at 20 m distance. Data
generated by these gene dispersal experiments are being used by
the
Regulatory Authorities to determine isolation distances and
monitoring procedures for the release of transgenic plants in the
UK.
----------
From: Daniel Worley
To: joel b gruver
Cc: sanet-mg@shasta.ces.ncsu.edu
Subject: Re: Fwd: GEN2-7
Date: 10 February 1999 05:23
At 18:06 2/9/99 -0500, you wrote:
>In response to the following post...
>
>> >UK Government Burns Biotech Canola
[snip]
>A buffer zone of 6 m is hardly enough to minimize transfer of GM
>canola pollen...
Good points all Joel. Just how much of a buffer zone would be needed? I
don't know much about these things, but have heard that bees can travel as
far as a mile or more from their hive in search of nectar. So it would
seem plausible to me that a buffer of at least that far should be required.
Anyone with the credentials care to comment?
From the litigations in progress right now, it seems the seed companies
(Monsanto in particular) refuse to admit the fact that cross pollination
can occur at all.
--Dan in Sunny Puerto Rico--
dan.worley@mindless.com
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