Somatic Hybridization / Protoplast fusion
Somatic Hybridization is performed by protoplast fusion (cells without cell walls = protoplasts). Thereby cells of crop plants fuse with other cells of the same species. The aim is to transfer properties which are desired by breeders and to generate a beneficial crop plant without genetic engineering.
The plant cells can originate from one species in different breeding lines. In that way you get plants with additional properties.
For cell fusion an electrical field is needed. The cells align and fuse while alternating and direct current. Benefits of this method are accelerated breeding and optimization without genetic engineering.