シマグワ系自然交雑系統M28,M32およびM38の非休眠性について

概要

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In order to get information on the selection of mulberry varieties fitting for cultivation in subtropical regions such as the South West Islands, the sprouting percentage of winter buds, kept at 30°C for 15 days, was investigated from September to February, using one strain of Shimaguwa (Morus acidosa Griff.) and three strains, M28, M32 and M38, which had been selected from naturally-crossed seedlings of Shimaguwa. The Shimaguwa strain gave high percentage of bud sprouting, showing that it had no dormancy. M28, M32 and M38 showed almost the same tendency as Shimaguwa strain, suggesting that these three strains had no dormancy as well. Accordingly, it was ascertained that the three strains had no restingg period and that their buds are ready to sprout whenever the temperature became favourable. Therefore, these three strains are regarded as the desirable strains for future selection of mulberry varieties suitable for the South West Island.
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