Anticipating obstacles to achieving transgenic promises and performances
2002
Johnson, C.W.
A large share of the United States area of soybeans, cotton, and maize is seeded to transgenic insect- and/or herbicide-tolerant varieties and/or hybrids. Herbicide transformants in rice have been produced and the race is on to get these products to the market place. Significant changes will occur in all phases of research, development, and marketing. Important lessons already learned in other crops can be helpful in identifying the best agronomic and most regulatory acceptable varieties. Insertion methods are improving to reduce yield drag. Other important issues include, but are not limited to, germplasm exchange, limited yield testing before release, negative pleiotropic effects, outcrossing to related species, gene stacking, little genetic improvement for yield, protected germplasm base, licensing agreements, and consumer acceptance of transgenic products. The bottom line is that transgenic herbicide-tolerant varieties provide a different tool for weed control. This has application in particular locations, but is not a cure-all for every production field.
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