ACB'S Objections to Syngenta's application for field trials of GM Maize

Prepared for the African Centre for Biosafety by Dr William Stafford September 2009

Description of Application

GA21 and Bt11xGA21 transgenic maize are genetically modified maize events. The Bt11xGA21 stacked maize was produced by the conventional breeding of individual GA21 and Bt11 transgenic events. GA21 maize produces a modified maize 5-enolpyruvylshikimate-3-phosphate synthase enzyme (mEPSPS) that confers tolerance to herbicide products containing glyphosate. Bt11xGA21 maize produces modified maize 5-enolpyruvylshikimate-3-phosphate synthase enzyme (mEPSPS) that confers tolerance to herbicide products containing glyphosate; as well as a truncated Cry1Ab protein for control of certain Lepidopteran pests and a phosphinothricin acetyltransferase (PAT) protein that confers tolerance to herbicide products containing glufosinate ammonium. This application is for the continued field trials of GA21 and Bt11xGA21 (Syngenta). read more