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UH44
‘UNIWAI BLUSH'
AND UH306 ‘UNIWAI PEARL’
| UH306
'Uniwai Pearl' |
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| UH44
'Uniwai Blush' |
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UH306
is the third seed-propagated Dendrobium cut flower cultivar
released by the University of Hawaii. It is a cross between
an inbred plant of Jaquelyn Thomas UH44 strain and a tetraploid
Neo Hawaii (Y972) which arose from meristem culture. The hybrid
has larger and whiter flowers than UH44 and rarely exhibits
the undesirable distortion of sprays (racemes) commonly encountered
in the tetraploid Neo Hawaii parent. Since UH306 is a cross
between Jaquelyn Thomas and Neo Hawaii, the hybrid progeny
name is Jaq-Hawaii.
Table
1 shows the comparison in yields between UH306 and UH44. In
each of the three years from 1976 to 1978 the yield of UH306
was higher than that of the UH44. Also the monthly yield of
UH306 was higher than that of the UH44. Also the monthly yields
of UH306 for the three years were spread throughout the year.
Some
of the important floral characteristics of UH306 and UH44
are shown in Table 2. In practically all characteristics UH306
was superior to UH44. Of particular significance is the whiter
flower of UH306.
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Table
1. Yield of sprays by months and years of Den. Jaq-Hawaii ‘UH306’
and Den. Jaquelyn Thomas ‘UH44’ (Total of 20 plants per cultivar)
| |
1976
|
|
1977
|
|
1978
|
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Total
|
|
|
Month
|
UH306
|
UH44
|
UH306
|
UH44
|
UH306
|
UH44
|
UH306
|
UH44
|
|
Jan
|
4
|
3
|
6
|
0
|
10
|
7
|
20
|
10
|
|
Feb
|
2
|
0
|
3
|
1
|
12
|
15
|
17
|
16
|
|
Mar
|
2
|
3
|
7
|
2
|
12
|
2
|
21
|
7
|
|
Apr
|
1
|
0
|
12
|
5
|
12
|
6
|
25
|
11
|
|
May
|
3
|
1
|
44
|
20
|
36
|
26
|
83
|
47
|
|
Jun
|
10
|
4
|
58
|
46
|
43
|
39
|
111
|
89
|
|
Jul
|
17
|
12
|
3
|
7
|
34
|
43
|
54
|
62
|
|
Aug
|
9
|
11
|
43
|
35
|
51
|
35
|
103
|
81
|
|
Sep
|
19
|
12
|
54
|
43
|
37
|
50
|
110
|
105
|
|
Oct
|
28
|
44
|
12
|
19
|
16
|
7
|
56
|
70
|
|
Nov
|
35
|
12
|
25
|
9
|
14
|
3
|
74
|
24
|
|
Dec
|
10
|
15
|
27
|
20
|
19
|
16
|
56
|
51
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Total
|
140
|
117
|
294
|
207
|
296
|
249
|
730
|
573
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Table
2. Flower characteristics of Den. Jaq-Hawaii ‘UH306’ and Den. Jaquelyn
Thomas ‘UH44’
|
Characteristics
|
UH306
|
UH44
|
|
Length
of sprays (cm)
|
66.0
|
63.6
|
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Length
of scape (cm)
|
21.5
|
17.1
|
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Number
of flower per spray
|
20.2
|
22.8
|
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Size
of flowers (cm)
|
6.3
|
5.7
|
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Vaselife
(half life in days)
|
12.7
|
11.6
|
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Percent
bud drop
|
1.7
|
2.0
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Color
index*
|
1.0
|
3.0
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*
1 = light pink tinge; 2 – moderate pink tinge; 3 – heavy pink tinge
H.
Kamemoto, Horticulturist
C.A.
Bobisud, Graduate Research Assistant
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