2021 Volume 20 Issue 1 Pages 109-115
The deep red strawberry cultivar ‘Shinku-no-misuzu’ was newly bred from a crossing between ‘Fusanoka’ and ‘Reiko’, and was characterized regarding aspects of the flowering time, yield, and fruit quality under forcing culture in Kanagawa Prefecture. ‘Shinku-no-misuzu’ exhibited slightly slower floral bud differentiation than the conventional cultivar ‘Tochiotome’, but showed high fruit hardness and a >20 brix/acid ratio. Relatively large amounts of glucose and fructose accumulated in ‘Shinku-no-misuzu’ fruit. The total anthocyanin content of the fruit was 185 μg・g-1 FW, which reached around three-fold the content of ‘Tochiotome’. The higher amount of anthocyanins, which are also known as antioxidants, in ‘Shinku-no-misuzu’ did not boost the total antioxidant activity of juice. Because >80% of anthocyanins were composed of pelargonidin glycosides in all cultivars investigated, the deep red color of ‘Shinku-no-misuzu’ fruit may not have been due to the anthocyanin composition but simply to the higher anthocyanin content.
