Proceedings of the Botanical Society of Korea Conference (한국식물학회:학술대회논문집)
- 1998.07a
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- Pages.79-82
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- 1998
THE MOLECULAR BREEDING OF ORNAMENTAL FLOWERING PLANTS; FLOWER COLOR MODIFICATION OF Torenia hybrida
- Ken-icho Suzuki (Institute for Fundamental Research, Suntory Ltd.) ;
- Yoshikazu Tanaka (Institute for Fundamental Research, Suntory Ltd.) ;
- Hui-min Xue (Institute for Fundamental Research, Suntory Ltd.) ;
- Yuko Fukui (Institute for Fundamental Research, Suntory Ltd.) ;
- Masao Fukuchimi-Zutani (Institute for Fundamental Research, Suntory Ltd.) ;
- Shinzo Tsuda (Institute for Fundamental Research, Suntory Ltd.) ;
- Yukihisa Katsumoto (Institute for Fundamental Research, Suntory Ltd.) ;
- Kazuyuki Ohhira (Institute for Fundamental Research, Suntory Ltd.) ;
- Keio Yunekura-Sakakobara (Institute for Fundamental Research, Suntory Ltd.) ;
- Takaaki Kusumi (Institute for Fundamental Research, Suntory Ltd.)
- Published : 1998.07.01
Abstract
White and blue/white varieties of Torenia hybrida cv. Summerwave (SWB) were successfully obtained from the blue variety of by cosuppressing gene expression of two of the enzymes involved in anthocyanin biosynthesis; chalcone synthase (CHS) and dihydroflavonol 4-reductase (DFR). Such molecular brceding is the only precise and efficient way to widen the flower color variation of SWB due to its male and female sterility. Flower color and the degree of suppression varies depending on the transgenic lines. The dorsal and ventral petal lobes and corolla tube consistently lose anthocyanins prior to lateral petal lobes. A pink variety was also obtained by cosuppressing the flavonoid 3`5`-hydroxylase (F3`5`H) gene. Yellow torenia was obtained from T-33, an in-house cultivar that contained both carotenoids and anthocyanins, by blockage of anthocyanin biosynthesis with cosuppressing CHS or DFR genes.
Keywords
- anthocyanin;
- chalcone synthase;
- dihydroflavonol 4-reductase;
- flavonoid 3`5`-hydroxylase;
- sense suppression;
- transgenic plants