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Rust and Thinning Management Effect on Cup Quality and Plant Performance for Two Cultivars of Coffea arabica L
journal contribution
posted on 2017-09-13, 00:00 authored by Fabian Echeverria-Beirute, Seth C. Murray, Patricia Klein, Chris Kerth, Rhonda Miller, Benoit BertrandBeverage quality
is a complex attribute of coffee (Coffea arabica L.). Genotype (G), environment (E),
management (M), postharvest processing, and roasting are all involved.
However, little is known about how G × M interactions influence
beverage quality. We investigated how yield and coffee leaf rust (CLR)
disease (caused by Hemileia vastatrix Berk. et Br.) management affect cup quality and plant performance,
in two coffee cultivars. Sensory and chemical analyses revealed that
10 of 70 attributes and 18 of 154 chemical volatile compounds were
significantly affected by G and M. Remarkably, acetaminophen was found
for the first time in roasted coffee and in higher concentrations
under more stressful conditions. A principal component analysis described
87% of the variation in quality and plant overall performance. This
study is a first step in understanding the complexity of the physiological,
metabolic, and molecular changes in coffee production, which will
be useful for the improvement of coffee cultivars.