Discussion
Crop-wild/weed hybridization has generated great concerns simply because gene flow can be an avenue for transgene escape, which could alter the genetic make-up of both populations (Ellstrand and Holfman 1990; Song et al. 2004). Evaluation of the fitness of crop-wild hybrids and their parents, especially the wild parents, is a direct way to investigate the potential consequences of crop-to-wild gene flow (Snow et al. 1998). In this study, agronomic comparisons were evaluated among GM soybean, wild soybean and their F1, F2 and F3 progenies, with implications for transgene escape from GM soybean varieties, resulting in a better understanding of its consequences.