Published in
American Association for the Advancement of Science, Science, 6201(345), p. 1181-1184, 2014
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- [agritrop.cirad.fr]
- [www.documentation.ird.fr] | PDF
- [www.researchgate.net] | PDF
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The coffee genome provides insight into the convergent evolution of caffeine biosynthesis
,
Lorenzo Carretero-Paulet,
Alexis Dereeper,
Gaetan Droc ,
Romain Guyot,
Fabien de Bellis,
Marco Pietrella ,
Chunfang F. Zheng,
Adriana Alberti,
François Anthony,
Giuseppe Aprea ,
Jean-Marc Aury,
Pasca; Bernard Maria Bento
and other authors.
Full text: Download
Abstract
Coffee is a valuable beverage crop due to its characteristic flavor, aroma, and the stimulating effects of caffeine. We generated a high-quality draft genome of the species Coffea canephora, which displays a conserved chromosomal gene order among asterid angiosperms. Although it shows no sign of the whole-genome triplication identified in Solanaceae species such as tomato, the genome includes several species-specific gene family expansions, among them N-methyltransferases (NMTs) involved in caffeine production, defense-related genes, and alkaloid and flavonoid enzymes involved in secondary compound synthesis. Comparative analyses of caffeine NMTs demonstrate that these genes expanded through sequential tandem duplications independently of genes from cacao and tea, suggesting that caffeine in eudicots is of polyphyletic origin. (Résumé d'auteur)