Intergeneric hybridization between Hordeum and Asiatic Elymus

Intergeneric hybridizations were performed between four Hordeum and five Asiatic Elymus species, and the embryos were rescued. Meiotic pairing was studied in the parental species and hybrids. The study revealed: i) the allopolyploid nature of the five Asiatic Elymus species; ii) that E. semicostatus (2n=4x=28), E. parviglume (2n=4x=28), and E. pendulinus (2n=4x=28) had no chromosome homology with the Hordeum species; iii) that E. tsukushiensis var. transiens contained a modified H genome from H. hogdanii. thus, its genome symbol should be SSHHYY.