Studies on breeding of 'Hyuga-squash', a Miyazaki origin vegetable: Breeding of excellent lines using self-pollination method in generations of interspecific hybrids between Cucurbita moschata and Fsub(1) (C. moschata * C.pepo)
2017
Iwamoto, Y. (Minami Kyushu University, Miyakonojo city, Miyazaki (Japan). Graduated School of of Horticultural and Food Sciences) | Goto, K. | Imonawa, Y. | Yono, S. | Tominaga, H. | Chen, L.
'Hyuga-squash', a Miyazaki origin vegetable, Japan, belongs to Kurokawa (Black skin) group of Cucurbita moschata. 'Miyazaki-wase No.1' is the most popular cultivar in Hyuga-squash. However, as the widespread of C. Maxima with mealy flash and favorable taste since 1950s, the Hyuga-squash has been decreased in cultivating area greatly. In the last report, we used interspecific hybridization between 'Miyazaki-wase No.1' x 'Kyudai No.33' to modify the weak points of lower harvest and sugar content. In this study, we focused on the 20 lines collected from both the reciprocal hybrid in 2010 and 2011, for self-pollination to get hopeful lines. The general morphologies of the hybrid fruits showed bloom in the surface, deeper ditch, uneven, near heart-shape and color same to 'Kyudai No.33'. Among the 20 lines, a few lines display the hopeful characteristics of fruit setting simultaneous, higher sugar contents, and good taste compared with that of 'Miyazaki-wase No.1', suggesting that the Hyuga-squash can be modified to be the hopeful cultivar by using the breeding method carried out in this study.
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