Agriculture Reference
In-Depth Information
FIGURE 12.1
(See color insert.)
.USDA-APHIS.authorized.ield.trial.of.transgenic.poplars.
in. Oregon. (United. States). during. its. irst. (top). and. second. (bottom). growing. seasons.. The.
population,. part. of. a. gene. discovery. program. using. a. method. called. “activation. tagging”.
(where. genes. are. randomly. upregulated. by. insertion. of. a. gene. expression. enhancer),. was.
being.screened.for.novel.morphologies.under.ield.conditions..The.trees.had.to.be.removed.
prior.to.the.desired.long-term.nature.of.this.experiment.because.of.regulatory.costs.associ-
ated. with. long-term. containment,. monitoring,. reporting,. and. removal. costs. for. large. trees..
There. is. no. obvious. scientiic. basis. for. intensively. regulating.such. trees. while.interspecies.
hybrid. poplar. trees,. and. those. produced. through. non-transgenic. forms. of.mutagenesis,. are.
essentially.unregulated.throughout.the.world.
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