Date of Award: Master of Science (MS) Plants, Soils, and Climate
The Triticeae tribe DUMORTER in the grass family (Poaceae)
includes the most important cereal crops such as wheat, barley,
and rye. They are also economically important forage grasses.
Elymus is the largest and most complex genus with approximately
150 species occurring worldwide. Asia is an important centre for
the origin and diversity of perennial species in the Triticeae
tribe, and more than half of the Elymus are known to occur in
the Asia. Cytologically, Elymus species have a genomic formula
of StH, StP, StY, StStY, StHY, StPY, and StWY. About 40% of
Elymus species are still unknown for the genomic constitution
and some have questionable genomic combination. However, the
origin of the Y genome is unknown. In order to identify the
origin of the Y genome, 212 accessions of Elymus,
Pseudoroegneria, and Hordeum species were tested using a Y
genome specific Sequence Tagged Site (STS) marker. We obtained
evidence supporting the hypothesis that th