Abstract
Male and female flower differentiation on cuttings in the propagating beds was compared with that on trees from which cuttings were taken, in 38 cultivars and one clone of Cryptomeria japonica during three growing seasons, 1968 to 1970. Cuttings were collected and planted in spring.
1) One year after the planting of the cuttings, types of flowers and percentage of cuttings bearing flowers were investigated, and the results were compared with the data on the trees which gave the cuttings. Cuttings bore more flowers than the twigs of their temporary ortets. (Fig. 1)
2) Flower production by cuttings was observed at nursery for three years. Percentage of rooted-cuttings which bore flowers varied widely with years. (Fig. 2) Many male flowers were found on cuttings of Kumotosi (a clone of Cryptomeria), and Yanase-sugi A and Yanase-sugi B (local variety) produced many female flowers through out three years. Sanbu-sugi (cultivar) which is generally known to flower very rarely did not flower on rooted-cuttings for three years. (Fig. 2-4)
3) There was no difference in the flower production between cuttings rooted and non-rooted. (Fig. 5)
