Morphological Selection of Somatic Hybrids - Selection of somatic hybrids based on their abnormal morphology was adopted by Melchers et al. (1978) in regenerating intergeneric somatic hybrids such as "pomatoes" and. 'topatoes' which are the fusion products of protoplasts of tomato and potato.

The regenerated plants showed abnormal morphology and proved to be somatic hybrids by analysis of chromosomal and fraction-1-protein, the ribulose1, 5-bisphosphate carboxylase. Intermediate morphology of the callus also determined the intergeneric somatic hybrids between Vicia faba and Petunia hybrida.