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GM Contamination Register
Incident details
Region/Continent and country:
Asia / Japan
Category of incident:
What was contaminated:
Volunteer Weeds
GM organism involved:
Oilseed rape/canola
Year incident occurred:

Route of contamination
Seed spillage during transport

Japan - Feral oilseed rape populations continues to grow and flourish for third year.

The Japanese Ministry of the Environment and the National Institute for Environmental Studies (NIES) have been continuing to conduct surveys of oilseed rape (canola) populations around Japanese ports.

See also Register entries for 2004, 2005 and 2007

The second citizens’ survey was carried out in 2005. The results announced at a meeting in Tokyo on 8 July 2006. In this survey, 1942 samples were taken in 42 prefectures. 38 positive samples were found using a simple kit for preliminary protein testing, of which 31 were found to be positive in a second DNA test by the PCR method.

The survey organisers "No! GMO Campaign" said the results showed that “GM varieties of canola were confirmed to be growing in unexpected locations far from distribution routes. The canola pollution detected in Hiji Town, Oita Prefecture, Kyushu, shows that this pollution has now spread much more widely than had previously been thought”.
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Further information

Japanese Ministry of the Environment Report for 2006. >

NIES report from 2006 survey Part 1 >

NIES report from 2006 survey Part 2 >

Results of MAFF survey of GM canola volunteers to be announced this fiscal year: >

Result from Citizens' survey by Seeds-Network Japan : >

Wild GM Canola Continues to Spread. Bio Journal - August 2006 >

Nishizawa et al (2009) Monitoring the occurrence of genetically modi?ed oilseed rape growing along a Japanese roadside: 3-year observations Environ. Biosafety Res. 8 (2009) 33–44 >

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