Researchers at the Chinese Academy of Agricultural Sciences (CAAS) have developed a bio-breeding resource for glyphosate herbicide-tolerant corn (maize). The team achieved this by introducing a codon-optimized glyphosate N-acetyltransferase gene (GAT) and the enolpyruvyl-shikimate-3-phosphate synthase gene (GR79- EPSPS) into the maize variety, B104. The scientists report that a genetically stable high glyphosate resistance transgenic event, GG2, was selected from the transgenic maize population through screening with high doses of glyphosate. The results of the study showed that the co-expression of the microbial genes, GAT and GR79-EPSPS, provides high glyphosate tolerance.
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