Abstract: Genomic evolutions were characterized by 31 ISSR (inter-simple sequence repeat) primers among 23 species in the genus Aegilops. The results indicate that the genome constituents of allopolyploid species had changed greatly through evolution compared with their ancestral diploid species. Genome U showed little alterations in U-containing allopolyploids, while others had undergone changes after allopolyploidization. In addition, genome U also displayed strong assimilation effect when it coexisted with other genomes, and the other genomes changed to varying degrees. The evolutionary changes of these genomes were discussed.

Key words: Aegilops, allopolyploid, genomic evolutionary change, ISSR