sentences:  The generic placement may be more a matter of nomenclature.Genera "Aegilops" and "Triticum" are very closely related; as the adjacent image illustrates, the "Aegilops" species occupy most of the basal branch points in bread wheat evolution indicating that genus "Triticum" evolved from "Aegilops" after an estimated 4 million years ago.The divergence of the genomes is followed by allotetraploidization of a speltoid goatgrass x basal wheat species "Triticum boeoticum" with strains in the middle eastern region giving rise to cultivated emmer wheat.