リンゴ新品種 ‘HFF33’／美紅^TMの育成過程とその特性

Abstract

A new red-fleshed apple cultivar, 'HFF33', which has superior taste and storability compared with 'Kurenainoyume,' was bred at Hirosaki University. Genotype analysis using SSR markers revealed that 'HFF33' could be obtained from a combination of 'Toko' × "Red-fleshed apple strain Parent A". The fruit has a conic shape, the peel develops a bright striped blush similar to 'Senshu,' and the flesh develops a crimson color on maturation. The tree had a branched shape, and the shoot growth was not so strong like 'Orin', although the branches were easily broken because of their thickness. At our experimental site, the suitable harvest time for this cultivar was the middle of November, and the fruit weighs 400 g, has a 13.4% soluble solid content, and around 0.6% titratable acidity. Fruit-bagging treatment completely prevented the development of cork spot-like physiological disorders and improved the skin blush: the color became brighter, and the stripe developed more distinctly than in non-bagged fruit. 'HFF33' exhibited long storability and could be stored under cold conditions for 180 days after harvest. Moreover, 1-MCP treatment was effective in preventing the loss of firmness. We registered 'HFF33' commercially with the trademark MIKU. Using this trademark, we will ensure quality control and establish the brand value.