New Zealand Journal of Crop and Horticultural Science abstracts
Regional trial evaluation and cultivar selection of triploid hop hybrids
R. A. BEATSON
V. R. BREWER
The Horticulture and Food Research Institute
of New Zealand
Riwaka Research Centre
R D 3, Motueka
New Zealand
Abstract A regional trial series on 12 triploid hop
selections together with four check triploid cultivars was conducted. The aim
was to assess commercial potential of the hop selections and to estimate the
importance of genotype x environment (G x E) interaction. The triploids were
derived from crossing three tetraploid female cultivars--`Hallertauer',
`Smoothcone', and `First Choice'--with diploid males. Genotype x environment
interactions were statistically significant for all of the characters measured.
However, the magnitude of the interaction components of variance were much less
than that caused by genotype variation. Of the 12 selections tested two were
considered to have commercial potential as high alpha acid producing types.
They were subsequently evaluated in more detail for several hop chemistry
characteristics. One of the two selections has now been named (`Pacific Gem')
and released for commercial production whereas the other is currently still
under brewing trial evaluation. Modifications to the evaluation of advanced hop
selections under New Zealand conditions is discussed in light of the relative
importance of G x E interaction to the main effect of genotypes.
Keywords hops; cultivars; essential oils; genotype x
environment interaction; Humulus lupulus
PDF file of entire paper: medium quality (386K); (scanned from paper original: notes about this process)
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