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Taiwan Agricultural Research Institute, Council of Agriculture, Executive Yuan--Research units-Fengshan Tropical Horticultural Experiment Branch-Department of Tropical Fruit Trees-About us

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Department of Tropical Fruit Trees

    Research activities of this Department center around the improvement of varieties and cultivation techniques of tropical fruit trees. Through the efforts of introduction, selection and cross breeding, the Department has released many varieties of fruits. Papaya varieties include Tainung No. 1, 2, 3 and 6 (Chu-Yu), and ring spot virus tolerant Tainung No. 5. For mango, two varieties with unique fruit aroma and shape have been developed, i.e., Tainung No. 1 and 2, which, along with the introduced varieties Irwin, Haden, Sensation and Keitt, offer diverse consumer choice and prolong the availability of mango fruits. Lychee varieties include Tainung No. 2 (Wuang Lee), Tainung No. 4 (Lucky) and Tainung No. 5 (Colorful); they are suited to different locations in Taiwan, prolonging the availability of lychee fruits, and increasing farmers' profits. Pineapple varieties include fresh market type Tainung No. 11 (Perfumed Pineapple), which has a distinct aroma, and Tainung No. 20 (Milky Pineapple), which is characterized by its delicate and low fiber flesh. Passion fruit Tainung No. 1 features a self-compatibility rate over 60%, and has become a major variety in Taiwan. Carambola Tainung No. 1, 2 (Jheng Gang), 3 (Red Dragon) and 4 (Golden Dragon) have brought increased export opportunities. Indian jujube varieties include large-fruited Tainung No. 1, 4 (Blue Dragon) and 9 (New Honey King). The superior guava variety, Tainung No. 1 (King), is distinguished by the flesh quality, which is not so easy to soften when ripe. Tainung No. 1 (Amethyst) is the first wax apple variety developed by Taiwan through cross breeding. The aforementioned varieties have been well accepted by farmers and consumers. In addition, the Department is devoting to the improvement of dragon fruit and other new fruit trees. 

    For the improvement of cultivation techniques, the following are some of the significant achievements. For papaya: preventive measures for boron deficiency and net house cultivation to prevent ring spot virus infection. For Indian jujube: net house cultivation to prevent oriental fruit fly and bird raiding. For lychee: dwarfing cultivation techniques of variety Yu-Her-Pau to facilitate mechanical pruning to reduce labor cost, and flowering adjustment techniques to increase pollination and yield. For wax apple: controlled flooding, root pruning, trunk girdling and/or black PE net shading to promote early-yielding and quality fruits in winter. For pineapple: high-density planting to increase potential yield by 50% and forced flowering with calcium carbide for year-round production. For guava: season regulation, improved cultivation techniques and organic liquid fertilization to increase fruit quality.

    To cope with climate change and market competition resulting from trade liberalization, in the future the Department will continue breeding for more new varieties, develop season regulation techniques, strengthen fruit tree physiology study to support the aforementioned activities, develop fruit tree health management techniques, and improve labor-saving cultivation techniques to lower production costs and enhance quality and competitiveness of Taiwan fruits.