Hydrangea plant 'HMOBL03-0'

Abstract

The invention relates to the field of Hydrangea, specifically, the variety designated ‘HMOBL03-0’. The variety ‘HMOBL03-0’ is characterized by its lack of vernalization requirement for induction and development of flowering, day-length neutral flowering, cold tolerance to USDA Zone 5 and lace-cap inflorescence having blue flowers. The present invention relates to plant parts, including cells and any propagative material of the new variety ‘HMOBL03-0’, and use of any of the plant parts for reproducing the new variety ‘HMOBL03-0’. The present invention relates to methods using any plant parts or progeny of ‘HMOBL03-0’ for the purpose of deriving additional new Hydrangea varieties. The present invention relates to seed, plants and plant parts produced by crossing ‘HMOBL03-0’ with any other Hydrangea variety or other plant. The present invention also relates to methods to produce new varieties of Hydrangea oleracea using the variety ‘HMOBL03-0’ and applying plant breeding techniques.

Claims

1. Hydrangea ‘HMOBL03-0’, representative biological material to be deposited at Bigelow Laboratory for Ocean Sciences, East Boothbay, Me.

2. A plant or a plant part thereof produced by growing the plant of claim 1, wherein the plant or plant part comprises at least one cell of Hydrangea ‘HMOBL03-0’.

3. A Hydrangea plant or part thereof, having the physiological and morphological characteristics of the plants of claim 1.

4. The tissue or cell culture of regenerable cells produced from the plant of claim 1.

5. The tissue or cell culture of claim 4, comprising tissues or cells from a plant part selected from the group consisting of leaves, vegetative cuttings, pollen, embryos, cotyledons, hypocotyl, meristematic cells, roots, root tips, pistils, anthers, flowers and stems.

6. A method of producing Hydrangea progeny comprising the steps of (a) crossing a plant of Hydrangea ‘HMOBL03-0’ as a female or male parent with another Hydrangea plant or other plant and (b) selecting progeny.

7. The method according to claim 6, wherein the second plant is Hydrangea ‘HMOBL03-0’.

8. (canceled)

9. A method for developing a Hydrangea plant in a plant breeding program using plant breeding techniques, including crossing, recurrent selection, mutation breeding, wherein said mutation breeding selects for a mutation that is spontaneously or naturally induced or artificially induced, backcrossing, pedigree breeding, marker enhanced selection, haploid/double haploid production or transformation to a plant of Hydrangea ‘HMOBL03-0’, or it's parts, or progeny wherein application of said techniques results in development of a Hydrangea plant.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The patent or application file contains a drawing executed in color. Copies of this patent or patent application publication with color drawing will be provided by the Office upon request and payment of the necessary fees.

[0034] The accompanying photograph illustrates the overall appearance and morphology of the new Hydrangea ‘HMOBL03-0’ showing the colors as true as is reasonably possible with colored reproductions of this type. Colors in the photograph may differ slightly from the color values cited in the detailed botanical description which accurately describes the color of ‘HMOBL03-0’.

[0035] The accompanying drawing illustrates flowers and foliage of Hydrangea ‘HMOBL03-0’ at approximately 26 to 28 weeks of age. This photo was taken in Santa Paula, Calif.

Objects of the Invention

[0036] The following embodiments and aspects thereof are described in conjunction with system, tools and methods which are meant to be exemplary, not limiting in scope.

[0037] The present invention, in some embodiments thereof, relates to Hydrangea plants and characteristics of these plants.

[0038] The present invention relates to Hydrangea plants, and parts thereof, having all the physiological and morphological characteristics of Hydrangea ‘HMOBL03-0’.

[0039] Another embodiment relates to a plant produced by vegetative means which are Hydrangea ‘HMOBL03-0’. The present invention also relates to plant parts, such as pollen, seeds or inflorescence produced by Hydrangea ‘HMOBL03-0’.

[0040] Another embodiment relates to a method of producing seed which are Hydrangea ‘HMOBL03-0’.

[0041] Another embodiment also relates to a method of producing Hydrangea progeny comprising the steps of (a) self-pollinating Hydrangea ‘HMOBL03-0’ (b) harvesting seeds produced from said self-pollination; and (c) producing plants from said harvested seeds.

[0042] The present invention also relates to producing progeny plants from the cross of Hydrangea ‘HMOBL03-0’, as the female or male parent, with another Hydrangea plant, and selecting progeny plants from this cross.

[0043] The present invention also relates to producing progeny plants of Hydrangea ‘HMOBL03-0’, by any known means of vegetative propagation.

[0044] The present invention also relates to producing progeny plants from Hydrangea ‘HMOBL03-0’, from natural or induced mutation.

[0045] Another embodiment relates to tissue culture produced from protoplast of cells from Hydrangea ‘HMOBL03-0’ plants disclosed in the subject application, wherein said cells or protoplasts are produced from a plant part selected from the group consisting of pollen, ovules, embryos, protoplasts, meristematic cells, callus, leaves, anthers, cotyledons, hypcotyl, pistils, roots, root tips, flowers, seeds, petiole and stems.

[0046] Another embodiment relates to a plant or a part thereof, produced by growing Hydrangea ‘HMOBL03-0’, wherein the plant part comprises at least one cell of Hydrangea ‘HMOBL03-0’.

[0047] Another embodiment relates to tissue or cell culture of regenerable cells produced from the plants of Hydrangea ‘HMOBL03-0’ as well as an Hydrangea plant regenerated from the tissue or cell culture of Hydrangea ‘HMOBL03-0’.

[0048] Another embodiment relates to a method of vegetatively propagating the plant of Hydrangea ‘HMOBL03-0’, comprising the steps of: collecting tissue or cells capable of being propagated from a plant of Hydrangea ‘HMOBL03-0’; cultivating said tissue or cells to obtain proliferated shoots; and rooted said shoots to obtain rooted plantlets; or cultivating said tissue or cells to obtain shoots or to obtain plantlets and a plant produced by growing the plantlets or shoots of said plant.

[0049] A further embodiment relates to a method for developing an Hydrangea plant in an Hydrangea breeding program, comprising applying plant breeding techniques comprising crossing, recurrent selection, mutation breeding, wherein said mutation breeding selects for a mutation that is spontaneous or artificially induced, backcrossing, pedigree breeding, marker enhanced selection, haploid/double haploid production, ploidy manipulation, or transformation to the Hydrangea plant of Hydrangea ‘HMOBL03-0’, or its parts, wherein application of said techniques results in development of an Hydrangea plant.

[0050] A further embodiment relates to a method of introducing a mutation into the genome of Hydrangea ‘HMOBL03-0’, and wherein the resulting plant comprises at least one genome mutation and producing plants there from.

[0051] In addition to the exemplary aspects and embodiments described above, further aspects and embodiments will become apparent by study of the following descriptions.

BRIEF DESCRIPTION OF THE INVENTION

[0052] This invention is directed to Hydrangea plants having all the morphological and physiological characteristics of the variety ‘HMOBL03-0’ produced from either vegetative cuttings or tissue culture.

[0053] The new Hydrangea ‘HMOBL03-0’ can be produced by asexually reproducing progeny. Asexual reproduction of the new cultivar by vegetative means was first performed by vegetative cuttings during May of 2018, in Santa Paula, Calif. The first ‘HMOBL03-0’ plants propagated through the use of such cuttings are maintained in Santa Paula, Calif. and have reproduced multiple generations. Subsequent asexual reproduction has demonstrated that the new cultivar reproduces true-to-type and that the combination of characteristics as herein disclosed for the new cultivar are firmly fixed and retained through successive generations of asexual reproduction.

[0054] The following traits have been repeatedly observed and are determined to be unique characteristics of ‘HMOBL03-0’ which in combination distinguish these Hydrangea as new and distinct cultivars: [0055] 1. No vernalization required for induction and development of flowering. [0056] 2. Flowering is day length neutral and remontant. [0057] 3. Cold tolerant to USDA Zone 5. [0058] 4. Lace-cap inflorescence having blue sterile flowers and light pink fertile flowers.

[0059] The new Hydrangea “HMOBL03-0” can be compared to Hydrangea macrophylla ‘PIIHM-I’ USPP 20,176. Plants of ‘PIIHM-I’ differ from plants of ‘HMOBL03-0’ in the following: [0060] 1. ‘HMOBL03-0’ has no chill/vernalization requirement as does this comparator. [0061] 2. The new variety has blue sterile and fertile flowers; this comparator has pink flowers. [0062] 3. ‘HMOBL03-0’, has stronger branches than this comparator. [0063] 4. ‘HMOBL03-0’ has narrower foliage than this comparator.

[0064] Hydrangea ‘HMOBL03-0’ can also be compared to the unpatented Hydrangea macrophylla ‘BAILMER’, USPP 15,298. Plants of ‘BAILMER’ differ from plants of ‘HMOBL03-0’ in the following: [0065] 1. ‘HMOBL03-0’ has no chill/vernalization requirement as does this comparator. [0066] 2. The new variety has blue lace-cap inflorescences; this comparator has blue mop head inflorescences. [0067] 3. ‘HMOBL03-0’, has stronger branches than this comparator. [0068] 4. ‘HMOBL03-0’ has narrower foliage than this comparator.

[0069] ‘HMOBL03-0’ has not been tested and observed under all possible environmental conditions. The phenotype of the new cultivar may vary with variations in environment such as temperature, light intensity, frequency of fertilization, composition of fertilizer, flowering treatment, day length and humidity, without any change in the genotype of the plant.

[0070] For example, substantial differences in plant height and diameter can be observed, depending upon environmental conditions and planting density. Inflorescence size and color can vary as well.

Detailed Botanical Description

[0071] The aforementioned drawings, together with the following observations, measurements and values describe the new Hydrangea ‘HMOBL03-0’ as grown in a greenhouse in Santa Paula, Calif. Plants of ‘HMOBL03-0’ were grown in a research greenhouse with temperatures ranging from approximately 5° C. to 18° C. during the day and night temperatures ranging from approximately 20° C. to 30° C. in the day and approximately 15° C. to 25° C. in the day. No artificial lighting or photoperiodic treatments were conducted. Plants were measured at approximately 4.5 months old from an unrooted cutting.

[0072] Color reference are made to the Royal Horticultural Society Colour Chart (RHS), 2007 edition, except where general colors of ordinary significance are used. Color values were taken under daylight conditions in a greenhouse in Ventura County, Calif.

Plant

[0073] Plant type: Flowering deciduous perennial shrub.
Age of Plant Described: Approximately 4.5 months from an unrooted cutting.
Growth Habit: Broadly rounded.

Height: 45 cm.

Plant Spread: 65 cm.

[0074] Plant vigor: Moderate.
Branching Habit: Strong branching from a pinch. Branches occurring at mostly obtuse angles.
Length of Primary Lateral Branches: Average range 20 to 44 cm.

Diameter of Lateral Branches: 5 to 7 mm.

[0075] Quantity of Lateral Branches: Average range 15 to 20.

Stem:

[0076] Stem shape: Round.

[0077] Stem strength: Strong.

[0078] Color: [0079] Immature: RHS Yellow-Green 146A, flushed Greyed-Purple N186C. [0080] Mature: RHS Yellow-Green 146C.

[0081] Texture: Glabrous.

[0082] Aspect. Straight, occurring at 15° to 85° from center.

Internode length: Average 4.0 cm.

Foliage

Leaf:

[0083] Arrangement: Opposite.

[0084] Leaf shape: Elliptic.

[0085] Average Length: 7 to 10 cm.

[0086] Average Width: 4 to 5 cm.

[0087] Apex: Acuminate.

[0088] Base: Obtuse.

[0089] Margin: Dentate.

[0090] Texture of top surface: Glabrous.

[0091] Texture of bottom surface: Glabrous.

[0092] Color: [0093] Young foliage upper side: Near Green 137B. [0094] Young foliage under side: Near Green 138A. [0095] Mature foliage upper side: RHS Green 137A. [0096] Mature foliage under side: RHS Green 137C.

[0097] Venation: [0098] Pattern: Pinnate. [0099] Color upper side: RHS Yellow-Green 144C. [0100] Color under side: RHS Yellow-Green 145A.

[0101] Petiole: [0102] Average Length: Average 1.8 cm. [0103] Diameter: 3 mm to 4 mm. [0104] Petiole color upper side: RHS Greyed-Purple N186C, central strip near [0105] Yellow-Green 144A. [0106] Petiole color lower side: Near RHS Green 137B flushed Greyed-Purple N186C. [0107] Petiole Texture upper side: Glabrous. [0108] Petiole Texture lower side: Glabrous.

Flower

[0109] Natural flowering season: Day length neutral, flowering begins approximately 13 to 16 weeks after planting during any time of the year without chill hours.

Inflorescence:

[0110] Type: Lacecap. Compound umbel.

[0111] Quantity of flowers per inflorescence: [0112] Fertile flowers: 400-500. [0113] Sterile flowers: Average 15 to 20.

[0114] Shape: Flattened disc.

[0115] Height: About 7 cm.

[0116] Diameter: 10 cm to 18 cm.

[0117] Fragrance: None detected.

Sterile Flower:

[0118] Bud shape: Round.

[0119] Bud length: 9 mm.

[0120] Bud diameter: 8 mm.

[0121] Bud color: Near RHS Yellow-Green 145B and 145C flushed Violet-Blue 97C.

[0122] Aspect: Upright. Aging flowers somewhat pendulous.

[0123] Flower depth: 7 mm.

[0124] Flower Diameter: 4 to 5.5 cm.

[0125] Persistence: Self-cleaning.

Sterile Flower Petals: Petals not present.

Sterile Flower Sepal:

[0126] Arrangement: Cruciform, strongly overlapping.

[0127] Number: 4.

[0128] Shape: Wide deltate to irregular orbicular.

[0129] Tip: Broad acute.

[0130] Base: Obtuse.

[0131] Margin: Entire.

[0132] Length: 2.2 to 2.8 cm.

[0133] Width: 2.5 to 3 cm.

[0134] Texture, Upper: Smooth.

[0135] Texture, Lower: Smooth.

[0136] Color: [0137] Upper surface at first opening: Near RHS Blue 100D flushed Violet-Blue 97C. [0138] Under surface at first opening: Near RHS Blue 100D flushed Violet-Blue 97C. [0139] Upper surface at maturity: Near RHS Violet-Blue 97C with veins near Blue 100C. [0140] Under surface at maturity: Near RHS Violet-Blue 97C with veins near Blue 100C.

Sterile Flower Pedicel:

[0141] Length: 2 cm. [0142] Diameter: 2.5 mm. [0143] Angle: About 90°, pedicel strongly curved. [0144] Strength: Flexible. [0145] Texture: Glabrous. [0146] Color: Immature near RHS Yellow-Green 145A; Mature near Blue 100D.
Fertile Flower: Rotate flower composed of petals and noticeably protruding stamens. Petals do not unfurl on all flowers. Approximately 50% of flowers remain with furled petals and protruding stamens.

[0147] Bud shape: Sphere

[0148] Bud length: 3 mm.

[0149] Bud diameter. 2 mm.

[0150] Bud color. Near Blue 101D.

[0151] Flower aspect. Upright.

[0152] Flower shape: Rotate.

[0153] Flower diameter: 6 mm, petals only when fully unfurled; including protruding stamens 8 mm.

[0154] Flower length: 4 mm petals only; including protruding stamens 6 mm

[0155] Persistence: Self-cleaning.

Fertile Flower Petals:

[0156] Arrangement: Rotate.

[0157] Quantity: 5.

[0158] Length of petal: 2 mm.

[0159] Width of petal: 1 mm to 2 mm.

[0160] Apex: Acute.

[0161] Shape of petal: Narrowly elliptic.

[0162] Petal margin: Entire.

[0163] Petal base: Truncate.

[0164] Petal Texture: Smooth, upper and under side.

[0165] Color:

[0166] Upper surface at first opening: Near Yellow-Green 145C flushed near Blue 101D.

[0167] Under surface at first opening: Near Yellow-Green 145C flushed near Blue 101D.

[0168] Upper surface at maturity: Near Violet-Blue 97D

[0169] Under surface at maturity: Near Violet-Blue 97D

Fertile Flower Sepal: Minute and inconspicuous, less than 0.5 mm, colored near Violet-Blue 97D.

Fertile Flower Pedicel:

[0170] Angle: About 45°.

[0171] Strength: Flexible.

[0172] Length: Average 5 mm.

[0173] Width: 1 mm.

[0174] Texture: Glabrous.

[0175] Color: Near RHS Yellow-Green 145C flushed Violet-Blue 97D.

Reproductive Organs

[0176] Sterile flowers: Androecium irregularly present. Somewhat mis-formed gynoecium irregularly present.

Stamens:

[0177] Number: 1 to 4.

[0178] Filament length: 2 to 4 mm.

[0179] Filament color: RHS Yellow-Green 145C.

Anthers:

[0180] Shape: Globular.

[0181] Length: 1 mm.

[0182] Color: RHS Yellow-Green 154D.

[0183] Pollen color. Not observed. ps Pistil:

[0184] Number: 2.

[0185] Length: 1 to 3 mm.

[0186] Style: [0187] Length: 1 to 3 mm. [0188] Color: Near Yellow-Green 145C.

[0189] Ovary: About 0.5 mm in diameter and length. Colored near Yellow-Green 145C.

[0190] Stigma: [0191] Shape: Bi-lobed. [0192] Color: Near Yellow-Green 145D.
Fertile flowers:

Stamens:

[0193] Number: About 10.

[0194] Filament length: 3 mm to 6 mm.

[0195] Filament color: RHS White N155D.

Anthers:

[0196] Shape: Globular.

[0197] Length: 1 mm.

[0198] Color: RHS Yellow-Green 146D.

[0199] Pollen color: RHS Yellow-White 158D.

[0200] Pollen amount: Moderate.

Pistil:

[0201] Number: 3.

[0202] Length: 2 mm to 3 mm.

[0203] Style: [0204] Length: 1 mm to 2 mm. [0205] Color: Near Yellow-Green 154D.

[0206] Ovary color. Near Yellow-Green 154D.

[0207] Stigma: [0208] Shape: Bi-lobed. [0209] Color: Near Yellow-Green 154D.

Other Characteristics

[0210] Seeds and fruits: Not observed to date.

[0211] Disease/pest resistance: Neither resistance nor susceptibility to normal diseases and pests of Hydrangea have been observed.

[0212] Temperature tolerance: Low temperature tolerant to USDA Zones 5.