USPP22232P2

USPP22232P2 - Chrysanthemum plant named ‘Deksavanna’

Info

Publication number: USPP22232P2
Application number: US12/799,437
Authority: US
Inventors: Cornelis W. Dekker
Original assignee: Dekker Breeding BV
Current assignee: Dekker Breeding BV
Priority date: 2010-04-23
Filing date: 2010-04-23
Publication date: 2011-11-08

Abstract

A new and distinct cultivar of Chrysanthemum plant named ‘Deksavanna’, characterized by its daisy-type inflorescences with bright yellow-colored ray florets; strong and upright flowering stems; uniform flowering habit; and good postproduction longevity.

Description

Botanical designation: Chrysanthemum×morifolium.

Cultivar denomination: ‘DEKSAVANNA’.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar of Chrysanthemum plant, botanically known as Chrysanthemum×morifolium, commercially grown as a cut flower and hereinafter referred to by the name ‘Deksavanna’.

The new Chrysanthemum plant is a product of a planned breeding program conducted by the Inventor in Hensbroek, The Netherlands. The objective of the breeding program is to create new early-flowering daisy-type Chrysanthemum plants with large inflorescences, strong flowering stems, attractive and unique ray floret coloration and excellent postproduction longevity.

The new Chrysanthemum plant originated from a cross-pollination made by the Inventor in Hensbroek, The Netherlands on Oct. 3, 2007, of a proprietary selection of Chrysanthemum×morifolium identified as code number 05.46955.01, not patented, as the female, or seed, parent with a proprietary selection of Chrysanthemum×morifolium identified as code number 50340, not patented. The new Chrysanthemum plant was discovered and selected by the Inventor as a single flowering plant from within the progeny of the stated cross-pollination in a controlled greenhouse environment in Hensbroek, The Netherlands in March, 2008.

Asexual reproduction of the new Chrysanthemum plant by terminal cuttings in a controlled greenhouse environment in Hensbroek, The Netherlands since April, 2008, has shown that the unique features of this new Chrysanthemum plant are stable and reproduced true to type in successive generations.

SUMMARY OF THE INVENTION

Plants of the new Chrysanthemum have not been observed under all possible environmental conditions. The phenotype may vary somewhat with variations in environment such as temperature, daylength and light intensity, without, however, any variance in genotype.

The following traits have been repeatedly observed and are determined to be the unique characteristics of ‘Deksavanna’. These characteristics in combination distinguish ‘Deksavanna’ as a new and distinct Chrysanthemum plant:

- 1. Daisy-type inflorescences with bright yellow-colored ray florets.
- 2. Strong and upright flowering stems.
- 3. Uniform flowering habit.
- 4. Good postproduction longevity; plants maintain good substance for about 24 days in an interior environment.

Plants of the new Chrysanthemum differ from plants of the female parent selection in the following characteristics:

- 1. Plants of the new Chrysanthemum are more vigorous than plants of the female parent selection.
- 2. Ray florets of plants of the new Chrysanthemum are flatter than and not as upright as ray florets of plants of the female parent selection.

Plants of the new Chrysanthemum differ from plants of the male parent selection in the following characteristics:

- 1. Plants of the new Chrysanthemum flower two days earlier than plants of the male parent selection.
- 2. Plants of the new Chrysanthemum have larger inflorescences than plants of the male parent selection.
- 3. Ray florets of plants of the new Chrysanthemum are flatter than and not as upright as ray florets of plants of the male parent selection.

Plants of the new Chrysanthemum can be compared to plants of Chrysanthemum×morifolium ‘Dekorlina’, disclosed in U.S. Plant Pat. No. 19,724. In side-by-side comparisons conducted in Hensbroek, The Netherlands, plants of the new Chrysanthemum differed from plants of ‘Dekorlina’ in the following characteristics:

- 1. Plants of the new Chrysanthemum were more vigorous than plants of ‘Dekorlina’.
- 2. Ray florets of plants of the new Chrysanthemum were flatter than and not as upright as ray florets of plants of ‘Dekorlina’.

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying colored photographs illustrate the overall appearance of the new Chrysanthemum plant. These photographs show the colors as true as it is reasonably possible to obtain in colored reproductions of this type. Colors in the photographs may differ slightly from the color values cited in the detailed botanical description which accurately describe the colors of the new Chrysanthemum plant.

The photograph on the first sheet comprises a side perspective view of a typical flowering stem of ‘Deksavanna’ grown as a spray-type.

The photograph on the second sheet comprises close-up views of the upper (top of photograph) and lower surfaces (bottom of photograph) of typical inflorescences and leaves of ‘Deksavanna’.

DETAILED BOTANICAL DESCRIPTION

The aforementioned photographs and following observations and measurements describe plants grown during the winter in Hensbroek, The Netherlands, under commercial practice in ground beds in a glass-covered greenhouse. Plants were initially given 1.5 weeks of long day/short night treatments followed by short day/long night treatments to induce flower initiation and development. During the production of the plants, day temperatures ranged from 18° C. to 25° C., night temperatures ranged from 20° C. to 22° C. and light levels were about 7 kilolux. Plants were 8.5 weeks old when the photographs and the description were taken. In the following description, color references are made to The Royal Horticultural Society Colour Chart, 2007 Edition, except where general terms of ordinary dictionary significance are used.

Botanical classification: Chrysanthemum×morifolium ‘Deksavanna’.
Parentage:
- - Female, or seed, parent.—Proprietary selection of Chrysanthemum×morifolium identified as code number 05.46955.01, not patented.
  - Male, or pollen, parent.—Proprietary selection of Chrysanthemum×morifolium identified as code number 50340, not patented.
Propagation:
- - Type.—Terminal vegetative cuttings.
  - Time to initiate roots, summer.—About four days at 20° C.
  - Time to initiate roots, winter.—About six days at 20° C.
  - Time to produce a rooted young plant, summer.—About 13 days at 20° C.
  - Time to produce a rooted young plant, winter.—About 15 days at 20° C.
  - Root description.—Fine, fibrous; light brown in color.
  - Rooting habit.—Freely branching, moderately dense.
Plant description:
- - Appearance/growth habit.—Herbaceous daisy-type cut flower that is typically grown as a spray-type; moderately vigorous growth habit.
  - Flowering stem description.—Aspect: Erect. Strength: Strong. Length: About 75 cm. Stem diameter: About 6 mm to 7 mm. Spray diameter: About 20 cm to 25 cm. Internode length: About 1.5 cm to 2 cm. Texture: Finely pubescent; longitudinally ridged. Color: Lighter than 146B.
  - Foliage description.—Arrangement: Alternate; simple. Length: About 6.5 cm to 10.5 cm. Width: About 3.5 cm to 6.5 cm. Apex: Mucronulate. Base: Attenuate. Margin: Palmately lobed, serrate; sinuses parallel to divergent. Texture, upper and lower surfaces: Pubescent, slightly rough; veins prominent on lower surface. Venation pattern: Pinnate, reticulate. Color: Developing leaves, upper surface: Close to N137D. Developing leaves, lower surface: Close to 147B. Fully developed leaves, upper surface: Darker than 147A; venation, close to 148B. Fully developed leaves, lower surface: Close to 147B; venation, close to 146C. Petiole: Length: About 0.5 cm to 2.5 cm. Diameter: About 4 mm to 6 mm. Texture, upper and lower surfaces: Slightly rough. Color, upper surface: Close to 146B. Color, lower surface: Close to 146B to 146C.
Inflorescence description:
- - Appearance.—Daisy-type inflorescence form with obovate to oval-shaped ray florets and tubular disc florets; inflorescences borne perpendicular to axillary laterals (peduncles); ray and disc florets develop acropetally on a capitulum.
  - Fragrance.—Moderately fragrant.
  - Flowering response.—Under natural conditions, plant flower in the autumn/winter in the Northern Hemisphere; at other times of the year, inflorescence initiation and development can be induced under short day/long night conditions (at least 13.5 hours of darkness); uniform flowering response; plants exposed to 1.5 weeks of long day/short night conditions after planting followed by photoinductive short day/long night conditions flower about 49 days later when grown as a spray-type.
  - Postproduction longevity.—In an interior environment, inflorescences and foliage will maintain good color and substance for about 24 days; inflorescences persistent.
  - Quantity of inflorescences.—Grown as a spray type, about 15 inflorescences develop.
  - Inflorescence size.—Diameter: About 6 cm to 7 cm. Depth (height): About 2 cm.

Disc diameter: About 1.5 cm. Receptacle height: About 3 mm to 4 mm. Receptacle diameter: About 7 mm to 9 mm. Receptacle color: Close to 145C.

- - Inflorescence buds.—Shape: Flattened spherical. Height: About 5 mm to 6 mm. Diameter: About 1 cm. Color: Close to 137C.
  - Ray florets.—Length: About 2 cm to 3 cm. Width: About 1.2 cm to 1.4 cm. Shape: Obovate to oval. Apex: Rounded. Base: Attenuate. Margin: Entire. Texture, upper and lower surfaces: Smooth, glabrous; satiny. Number per inflorescence: About 25 to 30 arranged in about two whorls. Aspect: Erect to about 45° from horizontal. Color: When opening, upper surface: Close to 2A. When opening, lower surface: Close to 3B. Fully opened, upper surface: Close to 3A; with development, color becoming closer to 5A. Fully opened, lower surface: Close to 4A.
  - Disc florets.—Shape: Fused tubular, erect and elongated. Apex: Dentate. Length: About 5 mm to 6 mm. Diameter: About 1 mm. Number per inflorescence: About 250, massed at the center of the receptacle. Color: When opening: Apex: Close to 145A. Mid-section: Close to 12A. Base: Close to 145D. Fully opened: Apex: Close to 7C. Mid-section: Close to 145D. Base: Close to 150D.
  - Involucral bracts.—Length: About 6 mm to 10 mm. Width: About 2 mm to 6 mm. Shape: Oval-shaped. Apex: Rounded. Base: Rounded to truncate. Margin: Entire. Texture, upper and lower surfaces: Smooth, glabrous. Number per inflorescence: About 30 to 35 arranged in about two to three whorls. Color, upper surface: Close to 144A. Color, lower surface: Close to 137C.
  - Peduncles.—Length, terminal peduncle: Terminal inflorescence bud removed to enhance spray development. Length, fourth peduncle: About 12 cm to 14 cm. Length, seventh peduncle: About 18 cm to 20 cm. Diameter: About 3 mm. Strength: Strong. Angle: About 30° from the flowering stem axis. Texture: Pubescent. Color: Close to 146A to 146B.
  - Reproductive organs.—Androecium: Not observed. Gynoecium: Present on both ray and disc florets. Style length: About 6 mm. Style color: Yellow. Stigma color: Yellow.
  - Seed/fruit.—Seed and fruit production have not been observed.
Disease/pest resistance: Resistance to pathogens and pests common to Chrysanthemums has not been observed on plants grown under commercial conditions.

Claims

1. A new and distinct Chrysanthemum plant named ‘Deksavanna’ as illustrated and described.