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Dendrobium Manoa Beauty 'K404-2', a Dendrobium phalaenopsis-type
tetraploid hybrid with attractive red-purple flowers, has
proved to be an excellent breeding plant. It was crossed to
amphidiploid D. Jaquelyn Thomas 'K333-22-4N' to produce
uniform offspring (K1121) with red-purple flowers on relatively
short pseudobulbs, and to amphidiploid D. Mini Gem
'K780-21 ' to produce floriferous short-statured offspring
(K1419). The latter hybrid was registered with the Royal Horticultural
Society as D. Sharon Sewake. It is being released for
commercial cropping as a seed-propagated potted plant cultivar.
Like
D. Miyoko Azuma, D. Sharon Sewake has a common
parent, tetraploid D. Manoa Beauty 'K404-2', but the
other parent is amphidiploid D. Mini Gem 'K780-21',
a hybrid between D. bigibbum var. compactum
of the section Phalaenanthe (P genome) and the
diminutive D. carronii of the section Eleutheroglossum
(E genome). Amphidiploid D. Mini Gem was crossed
earlier to D. antennatum of the Ceratobium section
to produce the tri-genome hybrid, D. Cathy Beck, UHl121,
(PCE); to D. stratiotes also of the Ceratobium
section to produce the tri-genome hybrid, D. Remy Hartmann,
UH 1307, (PCE); and to D. phalaenopsis var.
compactum of the Phalaenanthe section to produce
the triploid hybrid, D. Betty Nakada, UH1208, (PPE).
D.
Mini Gem 'K780-21' crossed to tetraploid D. Manoa Beauty
'K404-2' has produced an attractive tetraploid hybrid having
three sets of the P genome and one set of the E
genome. The cross, K1419, was made on February 17, 1991, germinated
in May 1991, compotted in January 1992, moved into 2-inch
pots in August 1992, and repotted into 5-inch shallow plastic
pots with No. 3 crushed rock in August 1993 and grown in the
glasshouse at the Mauka Manoa Campus. Monthly flower data
were accumulated through February 1996 when evaluation was
terminated.
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