Collect pollen from the male parent and transfer to the female parent to produce seed balls or true seed.
True seed contains many different progeny that have many different traits.
The tubers produced from these plants are all different shapes and sizes, and different skin and flesh colours. This is done over and over until only tubers that meet market requirements are left. This process of eliminating tubers that do not meet the criteria takes several years. The tubers that meet the criteria are tested for unseen traits and planted. Again, tubers are harvested and tubers with negative traits are thrown out.