Cactaceae plant named ‘Rio’

Details Cactaceae plant named ‘Rio’ Cactaceae plant named ‘Rio’

2002-12-31

2004-11-30

Grunberg, Anne Marie (Department: 1661)

Plants

Herbaceous ornamnental flowering plant

Cactus

Plant Patent

active

PP015378

ABSTRACT:

Latin name of genus and species of the plant claimed: The new plant is a species of
Hatiora×graeseri
Barthlott ex D. Hunt.
Variety Denomination: The new plant's varietal denomination is ‘Rio’.
BACKGROUND OF THE INVENTION
The present invention relates to a new and distinct variety of the Cactaceae family. The new variety is a
Hatiora hybrid
named ‘Rio’ by the inventor. The inventor is Dr. Thomas Boyle of the University of Massachusetts, residing in Amherst, Mass., a citizen of the United States.
Many members of the Cactaceae family can be forced to bloom in the Northern Hemisphere in the winter. Because they can bloom in the winter there is a large market for these varieties.
This new variety was produced by the inventor by a controlled cross. The new variety is a triploid form derived in part from the diploid
Hatiora
commercial cultivar ‘Evita’. ‘Evita’ was developed by J. de Vries Potplantencultures bv, Aalsmeer, the Netherlands and released in 1983.
The inventor developed the triploid seedling from crossing a tetraploid
Hatiora gaertneri
clone (female parent) with the diploid
Hatiora
cultivar ‘Evita’ (male/pollen parent). Neither parent is patented in the United States. The ploidy level of ‘Rio’ (triploid) was determined at the University of Massachusetts from chromosome counts of immature flower buds and root tips.
The overall red appearance of the flower is due to the generally even-toned color of its tepals.
The distinguishing characteristics of the new variety are retained by asexually reproduced, successive generations.
The new variety possesses the desirable characteristics of:
1. a strong growth habit with erect stems;
2. a “red” colored bloom;
3. relatively large flowers;
4. a strong propensity to branch with minimal pruning; and
5. a strong resistance to fungal diseases.
Blooming flowers on the plant can last as long as two weeks at temperatures between 60 and 70 degrees Fahrenheit. Cold temperatures slow down the rate at which buds mature into flowers. Strong light is also necessary for bud development.
The new variety has asexually reproduced by the inventor and under the direction of the inventor at a commercial nursery in Half Moon Bay, Calif. The new variety has been asexually reproduced through three successive generations by cuttings, and it has been found that the combination of characteristics as herein disclosed remain firmly fixed.
The present invention differs from its parents with respect to the following characteristics in Table 1:
H. gaertneri
H. x graeseri
H. x graeseri
Trait
tetraploid
‘Evita
‘Rio’
Length of
Between 55 and
Between 40 and
Between 50 and
mature
80 mm
60 mm
65 mm
phylloclades
Width of
Between 28 and
Between 20 and
Between and
mature
33 mm and
26 mm and
28 mm and
phylloclades
averaging
averaging
averaging
about 30 mm
about 23 mm
about 25 mm
Color of
Between RHS
RHS 137A
Between RHS
immature
175A and 178A
175A and 178A
phylloclades
Color of
RHS 44 A/B at
RHS 74B/C at
Overall RHS
perianth
apices and RHS
apices and RHS
45A, RHS 46B
segments at
26C at base
74D at base
in the upper
maturity
portion and RHS
47D at base
Color of
RHS 158C at
RHS 74 B/C
RHS 74 B/C
filaments at
base and
maturity
48D near apex
Color of
Between RHS
RHS 137B/C at
RHS 175A and
ovaries at
175A and 178A
base and RHS
178A
maturity
71A along edges
of ribs at distal
end
Color of
RHS 155D at
RHS 155D at
RHS 155D at
style at
proximal
proximal
proximal
maturity
end and RHS 33B
end and RHS 67B
end and red RHS
at distal end
at distal end
44A at distal end
Pollen
84.0 ±
68.2 ±
71.3 ±
diameter
6.6 microns
3.4 microns
4.5 microns
(mean ±
standard
deviation)
Stomatal
27.6 ± 8.5
14.2 ± 5.0
13.8 ± 4.0
density
(number/mm
2
)
Chromosome
2n = 4x = 44
2n = 2x = 22
2n = 3x = 33
number
Flower
About 60 mm
About 55 mm
50 to 57 mm
diameter
Branching
About 1-2 new
About 3-4 new
About 3 new
phylloclades per
phylloclades per
phylloclades per
segment
segment
segment


REFERENCES:
patent: PP11327 (2000-04-01), Boyle, III
patent: 6156959 (2000-12-01), Boyle, III
Renate Karle and Thomas H. Boyle, “Relationships between Floral Morphology, Breeding Behavior, and Flower Longevity in Easter Cactus,” University of Massachussetts (Amherst, Massachussetts), pp. 296-300, (Feb. 8, 1999).
Renate Karle, Constance A. Parks, Maureen C. O'Leary and Thomas H. Boyle, “Polyploidy-included Changes in the Breading Behavior ofHatiora×graeseri(Cacteceae),” University of Massuchussetts (Amherst, Massachussetts), pp. 397-403, (Feb. 8, 2002).
C. Parks and T.H. Boyle, “Variation in Ploidy Level, Fertility, and Breeding Behavior in Cultivated Schlumbergera (Cactaceae),” University of Massachusetts, supported by Can. Int. Dev. Agency (CIDA) (Amherst, Massachussetts), p. 341-346, (2003).

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