Breaching genetic glass ceilings to enhance crop biodiversity

Eighty percent of food and animal feed come from four crops, which is quite dangerous to food security.  Many other crops had been more widely cultivated, but lacked sufficient genetic diversity to keep up with the "big four", i.e. reached a genetic glass ceiling.  The missing diversity was analyzed for a group of representative crops, and transgenic solutions were ascertained that would begin to assist in enhancing crop diversity.