Two ditelotetrasomic plants each were found in the progenies of selfed monotelotrisomic plants for Triplo 6S and Triplo 7S. These plants grew normally in the greenhouse.

Ditelotetrasomic 6S and 7S showed good pollen fertility compared with monotelotrisomics and diploid sibs. However, they showed lower seed fertility (Table 1).

Transmission rates were studied in the progenies of selfed ditelotetrasomic plants with the following results: Frequencies of ditelotetrasomic plants were 23.3% and 27.1% for telosomic 6S and 7S, respectively. The frequencies of monotelotrisomics in the selfed progenies of ditelotetrasomics were 70.0% and 50.0% for 6S and 7S, respectively. These results suggest that ditelotetrasomics would be useful for linkage mapping and genetic analysis since they have high transmission rates through both female and male gametes.