Studies on Culturing Selectable Marker-free Transgenic Plant By Co-transformation

With the development of transgenic crops,the curity of selectable marker gene in transgenic crops has been corcerned extensively and how to culture the selectable marker-free gene plants has become the emphase of transgenic engineering.There are many methods that can eliminating the selectable marker gene.We surmmarize here the principle and method of co-transformation in addition to the recent developmentau over the world.