The coffee germplasm bank of the Institute Agronomico de Campinas has many Coffea arabica accessions from Ethiopia, which is considered the primary center of genetic diversity in coffee plants. An evaluation of the caffeine content of beans from 99 progenies revealed intra- and inter-progeny variability. In 68 progenies from the Kaffa region we found caffeine values in the range 0.46-2.82% (mean 1.18%), and in 22 progenies from Illubabor region these values ranged from 0.42 to 2.90% (mean 1.10%). This variability could be exploited in a breeding program aimed at producing beans with low-caffeine content.
Silvarolla, M. B., Mazzafera, P., & De Lima, M. M. A. (2000). Caffeine content of Ethiopian Coffea arabica beans. Genetics and Molecular Biology, 23(1), 213–215. https://doi.org/10.1590/S1415-47572000000100036