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Jonagold is a cultivar of apple which was developed in 1953 in New York State Agricultural Experiment Station of Cornell University's College of Agriculture and Life Sciences, a cross between the crisp Golden Delicious and the blush-crimson Jonathan. They form a large sweet fruit with a thin skin. Because of their large size they are now favoured by commercial growers in many parts of the world. Jonagold is triploid, with sterile pollen, and as such, requires a second type of apple for pollen and is incapable of pollenizing other cultivars. The Jonagored Apple, a sport mutation of Jonagold, was once covered under United States Patent PP05937,〔http://www.patentgenius.com/patent/PP5937.html〕 now expired. Jonagold has a green-yellow basic color with crimson, brindled covering colour. The apple has a fluffily crisp fruit. It is juicy and aromatic and has a sweet-sour taste. The skin can also turn out fully red or green other than Golden-Red. It is most popular in Belgium,〔Browning, Frank. (1998). ''Apples.'' New York: North Point Press. p. 105.〕 and according to the US Apple Association website it is one of the fifteen most popular apple cultivars in the United States.〔(Apple varieties ) by US Apple Association〕 ==Disease susceptibility== *Scab: high〔Dr. Stephen Miller of the USDA Fruit Research Lab in Kearneysville, West Virginia.〕 *Powdery mildew: low *Cedar apple rust: high *Fire blight: high 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Jonagold」の詳細全文を読む スポンサード リンク
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