An intergeneric hybrid between Er. orientale and Ae. squarrosa was reported. The spike shape of the F1 was intermediate between the parents but the spikelets showed the characters of Eremopyrum. In the majority of cells no chromosome pairing was observed. Average chromosome pairing was 0.1II+20.8I. This shows that the genomes of Er. orientale are quite different from the D-genome of Ae. squarrosa.
