• Biofortified sorghum in Africa: using problem formulation to inform risk assessment 

      A.F. Hokanson, K.E., Ellstrand, N.C.,Ouedraogo, J.T., Olweny, P.A., Schaal, B.A. and Raybould (Nat. Biotechnol., 2010)
      Most of the genetically modified (GM) crops approved to date (eg, corn, cotton and soybean improved for insect resistance or herbicide tolerance) do not have compatible wild relatives near their intended area of cultivation, ...