British plant geneticist instrumental in the creation of plant gene banks.
John Trevor Williams (21 June 1938 – 30 March 2015) was a British plant geneticist who was instrumental in the creation of plant gene banks. He was executive secretary and then first director at the International Board for Plant Genetic Resources (IBPGR) in Rome and made major contributions towards conserving the genetic resources of the world's food crops. His work led to the setting up of the Svalbard Global Seed Vault known as the 'Doomsday Vault', part of the international network of gene banks.