Triticum dicoccoides(2n=4x=28,AABB) is the donor of A and B genomes to T.aestivum L.(2n=6x=42,AABBDD).It has the super characters such as large grain,high protein content,resistance to powdery mildew,stripe rust and leaf rust,etc.Many studies have been carried out on its drought resistance,salt tolerance,insect resistance and so on.It has been also used for wheat improvement.In this paper,the study on Triticum dicoccoides and its application on wheat improvement were reviewed to provide basis for wheat gene...