| Materials | Female (2n = 18, ♀) | Male (2n = 34, ♂) | Generation |
| Generic cross | Platycodon grandiflorum | Campanula medium | F1 |
| Backcross | F1 | Campanula medium | Backcross generation |
| Self-copulation | F1 |
| S1 |
| F1 Group | F1 | F1 | F2 |