In this genetically modified potato the endogenous transcript of
the gbss gene is inactivated, thereby inhibiting the pro-duction of
the GBSS enzyme.
Due to the decreased amount of GBSS protein, a starch with reduced
amylose content (amy-lopectin starch) is synthesised in the tubers.
The modified potato plants were selected using the nptII-gene
product NPT. Hence the plants must be considered to be resistant
against antibiotics like neomycin and kanamycin.
The genetically modified potatoes harvested in the field trials are
not intended for use in the production of foodstuffs or animal
feed. Within the scope of the proposed release the alteration of
the starch composition of the genetically modified potato plants is
not expected to pose any threat to human or animal health, or to
the environment. No new proteins will be generated in the plant as
a consequence of the genetic modification.
In Europe the establishment of potatoes in natural ecosystems has
not been observed, since potatoes compete poorly against wild
plants and they are not frost resistant. From time to time potato
plants are found beyond the cultivated areas, but only on
non-natural sites such as verges and other ruderal areas. Owing to
the lack of frost hardiness the cultivated potato does not
establish in these areas either.
Potato plants can blossom and bear fruit. However, under Central
European climate conditions there is little likelihood that potato
seeds will overwinter and produce plants.
Attempts to cross-breed potatoes with solanaceous plants found in
Central Europe were not successful. In agricultural practice,
potatoes are propagated vegetatively via tubers. The pollen of the
potato plant can be transferred by insects or by wind. However,
wind dispersal only takes place over short distances. Pollen
transfer, therefore, would have no effect on the results of
The mode of action of the inserted genes and of its products is not
expected to have a negative impact on human or animal health, or on
Provisions to be adopted during the course of and after finishing
the field trial will limit the possibility of interaction with
other plant species and crops.
The genetically modified potatoes referred to in the proposed field
trial are not intended for use in foodstuffs or animal feed.
The field trial aims at the multiplication of seed potatoes for the
expected authorisation of cultivation in the European Union.
An English summary of the notification including the risk
assessment of the notifier is available at the EU WebSNIF
internet-page of Joint Research Centre under notification number
B/DE/06/186 (see below)
This LMO is authorised for placing on the market in the EU for
cultivation, food, feed and processing purposes, too. Further
information is available at the internet-page of the European