Feasibility studies for rapid breeding of very early onion
2018
Homma, Y. (Shizuoka Res. Inst. Agric. and For. (Japan)) | Kikuchi, Y.
Feasibility studies were carried out for rapid breeding of very early onion, cultivated around south-west Hamamatsu. Eleven onion individuals with genetically stable male-sterile characteristics were obtained from seed farms. All of these male-sterile individuals were early cultivars suitable for March shipments, and no male-sterile individuals were found among very early cultivars suitable for January shipments. Top onions were obtained by cutting florets from the onion heads. Possibilities for breeding Fsub(1) cultivars whose parents were both propagated vegetatively from top onions were discussed. Breeding term of very early onion might be greatly shorten, provided the selected very early onion seedlings could flower within one year, because ordinary onions are biennials. Possibilities for flowering onion seedlings within one year were shown. Policies for rapid breeding of very early onion were discussed.
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