Just as the probability of gene flow varies with the crop, environment and recipient plant, the potential impacts of gene flow vary not only with the nature of the transgene, but also with the recipient plant. Some of the ecological factors that determine the potential impact of gene flow are the recipient plant's potential for aggressive weediness, or, if the recipient is a crop, its invasiveness in agricultural systems; the initial population size of the recipient plant; and the factors that naturally limit or can be used to control an increase in the number of the recipient plant hybrids.
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