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Production of a new low-caffeine hybrid coffee and the biochemical mechanism of low caffeine accumulation |
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| Authors: | Chifumi Nagai Jean-Jacques Rakotomalala Riko Katahira Yeyun Li Katsuya Yamagata Hiroshi Ashihara |
| Institution: | 1. Hawaii Agriculture Research Center, Aiea, HI, 96701-3911, USA 2. FOFIFA, Centre National de la Recherche Appliquée au Développement Rural, B.P. 1690, Antananarivo, 101, Madagascar 3. Faculty of Home Economics, Tokyo Kasei Gakuin University, Tokyo, 194-0292, Japan 4. Key Laboratory of Tea Biochemistry and Biotechnology of Ministry of Agriculture and Ministry of Education, Anhui Agricultural University, Hefei, Anhui, 230036, China 5. Agri-Research Center, UCC Ueshima Coffee Co. Ltd., Takatsuki, Osaka, 569-0036, Japan 6. Department of Biological Sciences, Graduate School of Humanities and Sciences, Ochanomizu University, Bunkyo-ku, Tokyo, 112-8610, Japan |
| Abstract: | The GCAs are new tetraploid interspecific hybrids developed in Madagascar from Coffea eugenioides, C. canephora and C. arabica. Selected GCA having genotype UF1023 contained 0.37% DW caffeine and no detectable theobromine in green beans. Low caffeine accumulation in GCA plants is due mainly to the low biosynthetic activity of purine alkaloids, possibly the extremely weak N-methyltransferase reactions in caffeine biosynthesis. No significant catabolic activity of caffeine was found in GCA-UF1023, in common with almost all coffee plants including C. arabica. |
| Keywords: | Caffeine biosynthesis Caffeine degradation Coffea arabica Coffea canephora Coffea eugenioides Interspecific hybrid |
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