2003h-958 20thcentury advisorycommittees agricultural agriculturalbiotechnology amélioration argentina bio180f bio220f biotechnology cit972f conifers cropimprovement cropproduction crops cultures dnashuffling effectofstresson environmentalaspects environmentalpolicy ernteertrag ertragssteigerung food foodcrops forestrybiotechnology genes geneticallymodified geneticallymodifiedfoods geneticengineering geneticmarkers genetics genetischevariabilität géniegénétiquevégétal healthaspects history lan220f markierungsgen marqueursgénétiques microbialgeneticengineering moralandethicalaspects organisms pflanzenzüchtung plantbiotechnology plantbreeding plantgenetics plantgenomes plantmoleculargenetics plantmutationbreeding plantphysiology plants publicpolicy riskassessment riskmanagement socialaspects socialmovements transgenicplants unitedstates wa695f294m2004 wd4150 wg9300