EVALUATION OF HOPS VI. INFLUENCE OF VARIETY ON THE COMPOSITION OF THE α- AND β-ACIDS

Abstract
The proportions of cohumulone in the α-acid and of colupulone in the β-acid, as determined for a wide range of hop varieties, suggest that these proportions are primarily inborn characteristics and are affected by environment only to a minor extent. The ratio of colupulone in β-acid to cohumulone in α-acid is approximately constant. The flowers from the male hop contain humulone and lupulone together with their analogues. The co-fraction proportions again appear to vary with variety and, furthermore, the percentage of cohumulone in α-acid is related to that of colupulone in β-acid in the same way in both male flowers and female cones.

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