Transposable Elements in Rice Plant

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
本文フルテキスト

Two types of transposable elements in rice plants were characterized after isolation. One is closely related to Ac/Ds elements of maize and thus named RAc. The RAc elements are present in wild rice species as well as in cultivated rice species. The distribution of RAc elements in the genomes is different even among the closely related cultivars, suggesting that the RAc elements be active. The other is a retrotransposon, the structure of which resembles the integrated forms of retroviruses. Two general methods have been developed to isolate retrotransposon of plants. By using these methods, at least 12 families of retrotransposons of rice (Tos1-Tos12) were isolated. One retrotransposon, Tos3-1, was subjected to detailed investigation. Tos3-1 is 5.2 kb long and has structures common to retrotransposons of yeast and Drosophila. Southern blotting analysis showed that retrotransposons were present in wild rice species as well as in cultivated rice species, but not in maize and tobacco. The copy number and genomic location of some families varied among the cultivars tasted, suggesting that these elements be active. Total copy number of the retrotransposons was estimated to be approximately 1,000 in the rice genome. These results indicate that the retrotransposons are major transposons in rice as the case in Drosophila. The transposable elements described in this paper are the first ones found in rice.

刊行年月日
作成者 Hirohiko HIROCHIKA Atsushi FUKUCHI
オンライン掲載日
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
25
4
開始ページ 230
終了ページ 237
言語 eng

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