Meiotic analyses of the hybrids obtained in crosses with the 12 double-ditelocentric and 2 ditelocentric lines from A and B genomes ofTriticum aestivumL. cv. «Chinese Spring» were carried out to identify the chromosomes involved in an induced interchange in the cv. «Senatore Capelli» ofTriticum turgidum durum(2n= 4x= 28). A karyotype analysis of plants carrying the interchange was also carried out and compared to that showing the standard constitution. From these studies it was concluded that the chromosomes involved in the interchange in cv. «Senatore Capelli» were 7A and 5B.