The top and the right side of the diagram shows the evolution
of Spelt and Bread Wheat.
On the left side of the diagram, Durum Wheat, a common tetraploid
wheat, and a diploid Goat Grass are shown. These two have been
artificially crossed by NIAB to create new Synthetic Hexaploid
Using normal wheat crossing techniques, wheat breeders can transfer
potentially useful genes from these SHWs into existing wheat varieties
to widen the genetic diversity of modern wheat.
More information is available to explain the Wheat
Genome and the Evolution of Wheat.