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Production of a new low-caffeine hybrid coffee and the biochemical mechanism of low caffeine accumulation

Author:
Nagai, Chifumi, Rakotomalala, Jean-Jacques, Katahira, Riko, Li, Yeyun, Yamagata, Katsuya, Ashihara, Hiroshi
Source:
Euphytica 2008 v.164 no.1 pp. 133-142
ISSN:
0014-2336
Subject:
caffeine, plant breeding, hybrids, biosynthesis, chemical constituents of plants, Coffea arabica, Coffea canephora, coffee beans, interspecific hybridization
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.
Agid:
739238