During the study for genetic mapping for mutant gene yst3 two plants with two extra telocentric chromosomes for the short arm of chromosome 2 (14 + 2 telo 2S) were found in the selfed progenies of F₁ plant from the crosses between triplo 2S and yst3 mutant plants. The ditelo 2S plants and the monotelo 2S plants and diploid siblings were transplanted into clay pots in greenhouse. The morphological measurements for various plant parts were made with the results shown in Table 1.

Seed fertilities for monotelotrisomics and diploid siblings were 91.18% and 94.7%, respectively. However, no seeds were developed in ditelo 2S plants.

The ditelo 2S plants could not head normally; the spikes were wrapped in the flag leaf sheath instead of heading out.

Seed fertilities for monotelotrisomics and diploid siblings were 91.18% and 94.74%, respectively. However, no seeds were developed in ditelo 2S plants.