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►
Increased genetic
similarity between
hybrid Hemerocallis
cultivars
►
Based on a study of
genetic markers by J.P. Tomkins,
similarity has increased
from 76.2%
among species and early
cultivars to 83.6% among
cultivars released
into commerce
between 1991 and 1998.
►
Increased similarity can
lead to major problems,
especially increased
disease
susceptibility
(including daylily rust,
Puccinia hemerocallidis)
►
Many recently introduced
cultivars lack vigor, do
not multiply well,
and/or perform
poorly in certain
areas
As a result of
over-emphasizing the
importance of the
flowers’ appearance,
many recent daylily
introductions have
minimal value as garden
plants, and their value
as exhibition quality
blooms has increased;
they must be observed at
a close range to be
fully appreciated.
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