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.
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Nagai, C., Rakotomalala, JJ., Katahira, R. et al. Production of a new low-caffeine hybrid coffee and the biochemical mechanism of low caffeine accumulation. Euphytica 164, 133–142 (2008). https://doi.org/10.1007/s10681-008-9674-9
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DOI: https://doi.org/10.1007/s10681-008-9674-9