@article{oai:ir.kagoshima-u.ac.jp:00012024,
 author = {YAMAMOTO, Masashi},
 journal = {南太平洋海域調査研究報告=Occasional papers},
 month = {2016-10-31},
 note = {The Ryukyu Islands are located southwest part of Japan. Various local citrus are grown in this subtropical region. Since there are large geographical and climatic differences between the Ryukyu Islands and the main islands (Honshu, Kyushu, and Shikoku) of Japan, there are unique local citrus genetic resources on the Ryukyu Islands. Shiikuwasha (Citrus depressa) is an indigenous mandarin species in this region. This species is clearly distinguished from the mandarin grown in China and India based on the results of isozyme and DNA analyses. DNA analysis also revealed that wide diversity exists in Shiikuwasha. Although Kunenbo (C. nobilis) and Daidai (C. aurantium) have been grown in most the islands, they were introduced from China and/or Southeast Asia. Indigeneous Shiikuwasha and introduced species probably played a part in the origin of many local citrus on the Ryukyu Islands. Various unique species in this region such as Kabuchii (C. keraji), Oto (C. oto), and Rokugatsu-mikan (C. rokugatsu) have been widely cultivated. Fruit of some local citrus contains high levels of polymethoxyflavonoids, one of the most important health-promoting components of citrus.},
 pages = {9--15},
 title = {Citrus Genetic Resources Grown on the Ryukyu Islands, Japan},
 volume = {54},
 year = {}
}