Abstract
In the present study, 14 wild species and 36 cultivated varieties and species were dealt with cytologically. They were found to constitute a distinct polyploid series, 2x-3x-4x-5x-6x. Their polyploid relations are given in table 1.
Meiotic division in wild species takes place in the regular fashion in general, with 2 exceptions of triploid forms, Solanum maglia and S. commersonii, which have been considered as natural hybrids derived from a tetraploid form×diploid form. Pentaploid wild form, S. demissum forma atrocyaneum, also has meiotic irregularities, suggesting that it is a hybrid origin.
