The Naturally Evolved From Goosegrass Confers High Glyphosate Resistance to Rice.

Glyphosate-resistant crops developed by the gene from have been planted on a massive scale globally, which benefits from the high efficiency and broad spectrum of glyphosate in weed control. Some glyphosate-resistant (GR) genes from microbes have been reported, which might raise biosafety concerns. Most of them were obtained through a hygromycin- transformation system. Here we reported the plant source with 5-enolpyruvylshikimate-3-phosphate synthase () gene from goosegrass endowed rice with high resistance to glyphosate. The integrations and inheritability of the transgenes in the rice genome were investigated within two generations. The transgenic plants displayed similar growth and development to wild type under no glyphosate selection pressure but better reproductive performance under lower glyphosate selection pressure. Furthermore, we reconstructed a binary vector pCEiEPSPS and established the whole stage glyphosate selection using the vector. The Glyphosate-pCEiEPSPS selection system showed a significantly higher transformation efficiency compared with the hygromycin- transformation system. Our results provided a promising alternative gene resource to the development of GR plants and also extended the plant transformation toolbox.