Fruit and tree characters of seedlings originated from open pollination of "Miyauchi" iyo (Citrus iyo hort. ex Tanaka)
1996
Chikaizumi, S. (Ehime Univ., Matsuyama (Japan). Coll. of Agriculture) | Akiyoshi, H. | Mizutani, F.
By employing 27 seedlings originated from open pollination of Miyauchi iyo (Citrus iyo hort. ex Tanaka), we examined their morphological variations in order to clarify the parentage of Iyo, which is believed to have been found in 1887 as a chance seedling of unknown parentage in Yamaguchi prefecture. Both total soluble solids (TSS) content and titratable acidity in fruit from many seedlings seemed slightly higher than those of Miyauchi iyo fruit. Fruit characteristics were so diversified that satsuma, ponkan, iyo, sour organs, Hassaku and pummelo types were observed. The leaf area of seedlings was closely related to fruit size; trees with large leaves produced large fruit like Hassaku and pummelo but those with small leaves small ones like ponkan and ancore. By gas chromatographic analysis of essential oils in leaves and flavedo, the seedlings were divided into four types including satsuma, sour orange, iyo and Hassaku. Chromatogram patterns of iyo peels were very similar to those of satsuma and Hassaku. Only limonene was detected in leaves of one-year-old seedlings but several oils were distinguished in three-year-old seedlings. Taken together, we classified the Miyauchi iyo seedlings into three types; satsuma, sour orange and pummelo
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