To develop familiar educational materials to easily experience genetic phenomena, we had selected suitable individuals from the progenies of a F₁ commercial cherry tomato cultivar. Then, we succeeded to breed two genetically fixed cultivars of F₆ generation, i.e. ‘MINORI Red’ with pale green leaf and red fruit, and ‘KENTA Yellow’ with green leaf and yellow fruit. We have also completed the breeding of F₁ ‘DAICHAN Orange’ and F₂ ‘YUTO Six’, where you can clearly observe genetic segregations. Two to four weeks after sowing of these four cultivars, the difference of leaf colors becomes clear and you can experience the ‘Law of dominance’ and ‘Law of segregation’. After that if you transplant and grow them until ripening, you can experience the ‘Law of independence’ among the phenotypes of leaf colors and fruit colors.

In this study, cultivation methods of Job’s-tears (Coix lacryma-jobi L. var. lacryma-jobi) were examined. Bucket cultivation resulted in higher plant height and grain yield than flowerpot cultivation. Because the species prefers sunny and damp soil, bucket cultivation, which requires less watering, is considered to be more suitable. In addition, the germination rate exceeded 90% in the first year, and more than 70% of grains germinated in the second year, indicating that even grains stored for two years can be used. Furthermore, in order to verify its potential as a teaching material organism, this study also reports on the results of cultivation conducted at a special-needs high school, as well as on the results of practical manufacturing using the harvested grains.