Genetic Use Restriction Technologies (GURTs)
What are GURTs?
Genetic Use Restriction Technologies (GURTs), sometimes referred to as
"terminator" technologies, are experimental forms of genetic engineering
technology that
provide the means to either restrict the use of a plant variety, or the
expression of a trait in a plant variety, by turning a genetic switch on or off.
There are currently two types of GURTs under research. The first type, known
as a variety-specific or v-GURT, is designed to control plant fertility or seed
development. This form of GURT could be used to prevent seeds from growing after
harvest.
The second type of GURT, known as a trait-specific or t-GURT, could be used
to allow plants to express a beneficial trait (e.g. drought resistance) only after
specific treatment, such as the application of a special spray. Without the
treatment the trait would not be expressed. This type of GURT would not affect
plant fertility or seed development. Plants with GURT traits fall under the
broader category of Plants with Novel Traits, or PNTs.
Have any plants with GURT traits been released in Canada?
It is important to note that no applications have come forward for the
environmental release of plants with GURT traits in Canada. This technology is
currently still at the research stage in laboratories - there have been no
confined research field trials or commercial applications from developers to
date in Canada.
How are Plants with Novel Traits (PNTs)
evaluated in the environment?
Confined field trials (field trials which are designed to limit the impact of
plants on the environment until they have been fully evaluated for release by
CFIA and Health Canada evaluators) are designed to allow the developers of PNTs an opportunity to study their plants in the
environment, in order to generate data about their safety. In regulating
confined field trials of any PNTs, the CFIA only allows such trials when
appropriate scientific data can justify the safety of a trial to the
environment, including safety to animals, plants and humans. The same approach
would apply to any future requests to conduct confined field trials of plants
with GURT traits.
Will plants with GURT traits be assessed for
safety before their use in Canada?
As with all plants with novel traits, a new plant with GURT traits could be authorized
for use in Canada only after stringent scientific assessment of its
environmental, food and livestock feed safety. For more information on the
safety assessment of plants with novel traits, see the fact sheets "Regulating Agriculture Biotechnology in Canada: Environmental Questions"
and "Safety Assessment Process for Novel Foods and Agricultural Products of
Biotechnology".
How could GURTs potentially affect agriculture?
As with other technologies, GURTs have the potential to affect the
agricultural sector in several ways. While it is true that certain types of
GURTs could affect farmers’ ability to save seed for cultivation the next year,
the same technologies could prevent the unwanted spread of seeds and pollen in
the environment and eliminate quality loss caused by pre-harvest or in-storage
germination.
Other ways to control seeds have already been widely used in agriculture. For
example, in crops such as corn, a naturally occurring sterility mechanism is
used to produce hybrid seed. This increases yield for producers but limits their
ability to save and re-use seed. Most Canadian commercial corn is produced using
hybrid seed.
What is the Government of Canada position on
GURTs?
The Government of Canada recognizes that as with any new technology, GURTs
raise health and safety as well as socio-economic questions. The adoption of
this technology must proceed with caution, to
enable the full evaluation of any risks and benefits. This approach is
consistent with the way Canada considers all applications of biotechnology in
the environment – a cautious and responsible
case-by-case assessment of each new product.
What is the international approach towards GURTs?
In 2000, the United Nations’
Convention on
Biological Diversity (CBD) recommended that "in
the current absence of reliable data on genetic use restriction technologies,
without which there is an inadequate basis on which to assess their potential
risks, and in accordance with the precautionary approach, products incorporating
such technologies should not be approved by Parties for field testing until
appropriate scientific data can justify such testing, and for commercial use
until appropriate, authorized and strictly controlled scientific assessments
with regard to, inter alia, their ecological and socio-economic impacts and any
adverse effects for biological diversity, food security and human health have
been carried out in a transparent manner and the conditions for their safe and
beneficial use validated."
All Parties, including Canada, reaffirmed their support of the above
recommendation at the Eighth Conference of the Parties to the CBD (COP-8), which
took place March 20 – 31, 2006 in Curitiba, Brazil.
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