Concerns with the intrinsic and extrinsic quality attributes in foods have been growing in the last decades and the controversy was incited with the entrance of genetically modified foods on the global consumer market. Research institutes, inspection agencies and companies in several countries have developed strategies and methods to detect GM seeds. In this context, the objective of this experiment was to verify the efficacy of greenhouse bioassays to detect and quantify GM soybean seeds mixtures in conventional seeds samples. Conventional seeds samples were prepared with 0, 1, 3 and 5% of GM soybean seeds and sown in plastic trays containing sifted sand. The trays were maintained in an acclimatized greenhouse and, after fifteen days, the herbicide glyphosate was applied to the seedlings. Fourteen days after the herbicide application, the number of surviving seedlings was recorded. The greenhouse bioassay was efficient in detecting and estimating the quantity of GM soybean seeds in conventional soybean samples.
transgenic soybeans; glyphosate; herbicide resistance
