A Database for Triticeae and Avena
Several ditelotetrasomic plants for the short arm of chromosome 3
(2n=14+2 homologous telocentric chromosomes of 3S, ditelotetra 3S) were
found in the selfed progenies of six-rowed plants of monotelotrisomics,
Triplo 3S. These ditelotetrasomic 3S plants were grown together with
monotelo 3S and diploid siblings in the greenhouse. The morphological
measurements for various plants were made with the results shown in Table 1.
Generally, ditelo 3S showed no qualitative difference in morphology
from monotelo 3S and diploid siblings. However, ditelotetrasomic 3S
plants grew more slowly and had a smaller plant size. Pollen fertility
estimates for diploid siblings and monotelo 3S were 98% and 91.9%,
respectively, and ditelo 3S was 92.7%. Seed set values were 95.3%, 76.1%,
and 57.1% for diploid sibling, monotelo 3S and ditelo 3S, respectively.
This showed that ditelo 3S had fairly good pollen fertility, but seed set
was rather low.