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Long-term monitoring of feral genetically modified herbicide-tolerant Brassica napus populations around unloading Japanese ports.

Katsuta K, Matsuo K, Yoshimura Y, Ohsawa R - Breed. Sci. (2015)

Bottom Line: Genetically modified, herbicide-tolerant (GMHT) Brassica napus plants originating from seed spill have recently been found along roadsides leading from Japanese ports that unload oilseed rape.GMHT B. napus was found around 10 of 12 ports, but its proportion in the populations varied greatly by year and location.Furthermore, we found no herbicide tolerant B. juncea and B. rapa plants derived from crosses with GMHT B. napus.

View Article: PubMed Central - PubMed

Affiliation: Food Safety and Consumer Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries of Japan , Kasumigaseki, Tokyo 100-8950 , Japan.

ABSTRACT
Genetically modified, herbicide-tolerant (GMHT) Brassica napus plants originating from seed spill have recently been found along roadsides leading from Japanese ports that unload oilseed rape. Such introductions have potential biodiversity effects (as defined by the Cartagena Protocol): these include replacement of native elements in the biota through competitive suppression or hybridization. We conducted surveys in the period 2006-2011 to assess such threats. We examined shifts in the population distribution and occurrence of GMHT plants in 1,029 volunteer introduced assemblages of B. napus, 1,169 of B. juncea, and 184 of B. rapa around 12 ports. GMHT B. napus was found around 10 of 12 ports, but its proportion in the populations varied greatly by year and location. Over the survey period, the distributions of a pure non-GMHT population around Tobata and a pure GMHT population around Hakata increased significantly. However, there was no common trend of population expansion or contraction around the 12 ports. Furthermore, we found no herbicide tolerant B. juncea and B. rapa plants derived from crosses with GMHT B. napus. Therefore, GMHT B. napus is not invading native vegetation surrounding its populations and not likely to cross with congeners in Japanese environment.

No MeSH data available.


Related in: MedlinePlus

Twelve ports in Japan that import oilseed rape; we surveyed Brassica napus (plants originating from spilled seeds), B. juncea, and B. rapa populations around these unloading ports.
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f1-65_265: Twelve ports in Japan that import oilseed rape; we surveyed Brassica napus (plants originating from spilled seeds), B. juncea, and B. rapa populations around these unloading ports.

Mentions: In the ports of Kashima, Chiba, Yokohama, Shimizu, Nagoya, Yokkaichi, Osaka, Kobe, Mizushima, Uno, Hakata and Tobata (Fig. 1), we found a total of 1,029 populations of B. napus, 1,169 of B. juncea, and 184 of B. rapa. From a maximum of eight plants per population, we collected four or more fresh leaves per individual, and held them at –20°C before proceeding with biochemical analyses. We checked for the existence of transgenes as detailed below. When at least one GMHT plant was found, we considered the assemblage from which it had been taken to be a GMHT population.


Long-term monitoring of feral genetically modified herbicide-tolerant Brassica napus populations around unloading Japanese ports.

Katsuta K, Matsuo K, Yoshimura Y, Ohsawa R - Breed. Sci. (2015)

Twelve ports in Japan that import oilseed rape; we surveyed Brassica napus (plants originating from spilled seeds), B. juncea, and B. rapa populations around these unloading ports.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4482177&req=5

f1-65_265: Twelve ports in Japan that import oilseed rape; we surveyed Brassica napus (plants originating from spilled seeds), B. juncea, and B. rapa populations around these unloading ports.
Mentions: In the ports of Kashima, Chiba, Yokohama, Shimizu, Nagoya, Yokkaichi, Osaka, Kobe, Mizushima, Uno, Hakata and Tobata (Fig. 1), we found a total of 1,029 populations of B. napus, 1,169 of B. juncea, and 184 of B. rapa. From a maximum of eight plants per population, we collected four or more fresh leaves per individual, and held them at –20°C before proceeding with biochemical analyses. We checked for the existence of transgenes as detailed below. When at least one GMHT plant was found, we considered the assemblage from which it had been taken to be a GMHT population.

Bottom Line: Genetically modified, herbicide-tolerant (GMHT) Brassica napus plants originating from seed spill have recently been found along roadsides leading from Japanese ports that unload oilseed rape.GMHT B. napus was found around 10 of 12 ports, but its proportion in the populations varied greatly by year and location.Furthermore, we found no herbicide tolerant B. juncea and B. rapa plants derived from crosses with GMHT B. napus.

View Article: PubMed Central - PubMed

Affiliation: Food Safety and Consumer Affairs Bureau, Ministry of Agriculture, Forestry and Fisheries of Japan , Kasumigaseki, Tokyo 100-8950 , Japan.

ABSTRACT
Genetically modified, herbicide-tolerant (GMHT) Brassica napus plants originating from seed spill have recently been found along roadsides leading from Japanese ports that unload oilseed rape. Such introductions have potential biodiversity effects (as defined by the Cartagena Protocol): these include replacement of native elements in the biota through competitive suppression or hybridization. We conducted surveys in the period 2006-2011 to assess such threats. We examined shifts in the population distribution and occurrence of GMHT plants in 1,029 volunteer introduced assemblages of B. napus, 1,169 of B. juncea, and 184 of B. rapa around 12 ports. GMHT B. napus was found around 10 of 12 ports, but its proportion in the populations varied greatly by year and location. Over the survey period, the distributions of a pure non-GMHT population around Tobata and a pure GMHT population around Hakata increased significantly. However, there was no common trend of population expansion or contraction around the 12 ports. Furthermore, we found no herbicide tolerant B. juncea and B. rapa plants derived from crosses with GMHT B. napus. Therefore, GMHT B. napus is not invading native vegetation surrounding its populations and not likely to cross with congeners in Japanese environment.

No MeSH data available.


Related in: MedlinePlus