Abstract: Abstract: To provide the reference for research and utilization of Triticum-Aegilops complex. The origin and evolution of Triticum-Aegilops complex, and the role of Aegilops on the origin of multiploid wheat were well reviewed in this paper. The donors of B genome in multiploid wheat and that of some genomes in multiploid Aegilops species was still uncertain. Prospect was raised about how to identify the donors of the genomes mentioned above.