Abstract
HOP breeding is complicated by the fact that the flowers of male plants are useless for breeding, so that their genotype in this respect cannot be indicated pheriotypically. Hence male parents for breeding work have hitherto had to be selected by progeny testing. Brewing quality of hop cones (the female inflorescences) depends mainly on the amounts of soft resins present (the α-acid fraction being the most important) and the composition of the essential oil. The resins produce the bitter character of beer, while the oils contribute the characteristic flavour.
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References
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Roberts, J. B., Ph.D. thesis (Univ. London), 1963.
Neve, R. A., J. Inst. Brew., 69, 129 (1963).
Institute of Brewing: Hops Analysis Sub-Committee, J. Inst. Brew., 70, 156 (1964).
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A corrigendum to this article is available online at https://doi.org/10.1038/2081264e0.
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HARTLEY, R., NEVE, R. Relationships between Constituents of Cones and Male Flowers of the Hop (Humulus lupulus, L.). Nature 208, 804–805 (1965). https://doi.org/10.1038/208804a0
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DOI: https://doi.org/10.1038/208804a0
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