Apple Tree Rootstock Named 'D2212'

Abstract

A new and distinct variety of apple tree rootstock that exhibits compatibility with all apple varieties and resistance to Candidatus Phytopiasma mali and Athelia rolfsii.

Claims

1. A new and distinct variety of apple tree rootstock plant named ‘D2212’, as is herein illustrated and described.

Description

DESCRIPTION OF THE DRAWINGS

[0007] The accompanying photographic drawings illustrate the new variety at with the color being as nearly true as possible with color illustrations of this type.

[0008] FIG. 1 illustrates multiple plants of the new variety at approximately 1 year of age;

[0009] FIG. 2 illustrates multiple young plants of the new variety; and

[0010] FIG. 3 illustrates the new variety at 7 years of age with fruits thereon.

DETAILED BOTANICAL DESCRIPTION

[0011] The following detailed description sets forth the characteristics of the new variety at approximately 1 year of age and on a mother plant at 7 years of age. The data which defines these characteristics were collected as a result of asexual reproductions carried out in Rheinstetten, Germany on potted plants under standard growing conditions and taken under natural light. Where applicable, color descriptions are provided using X11 Color Names and their corresponding HEX Color Codes, accessed in August of 2022 via https://www.farbtabelle.de/de/farbtabelle.htm.

ROOTSTOCK

[0012] Height: 150.0 cm. [0013] Thickness: 12.0 mm. [0014] Vigor: Medium. [0015] Tree habit: Upright and straight growth. [0016] Form: Spindle. [0017] Use: Solely as a rootstock. [0018] Multiplication ability: [0019] Layering.—Not determined to date. [0020] Hardwood cuttings.—Very difficult. [0021] Softwood cuttings.—Possible, but with low yields. [0022] Pathogen resistance: Resistant to Candidatus Phytoplasma mali and Athelia rolfsii. [0023] Pest resistance/susceptibility: Not observed to date. [0024] Rootstock performance: [0025] Root sprouts (suckering).—None. [0026] Anchorage.—Stable in the ground. [0027] Compatibility.—Compatible with all varieties. [0028] Vigor.—Medium to strong. [0029] Shoot: [0030] Diameter.—Thick at midpoint. [0031] Internode length.—Medium to long. [0032] Texture.—Pubescence present on upper half of shoot. [0033] Glossiness of bark.—Medium to strong. [0034] Color.—Reddish brown on sunny side. [0035] Growing tip color.—Reddish. [0036] Buds: [0037] Position.—Adpressed relative to axis. [0038] Size.—Medium. [0039] Shape of tip.—Pointed. [0040] Support size.—Small to medium. [0041] Lenticels: [0042] Quantity.—Average. [0043] Length.—Medium to long. [0044] Shape.—Elliptic. [0045] Petiole: [0046] Shape.—Straight. [0047] Length.—2.0 cm; 3.5 length of blade to length of petiole ratio. [0048] Diameter.—0.15 cm. [0049] Leaves: [0050] Arrangement.—Alternate, spiral. [0051] Length.—From 6.5 to 7.0 cm. [0052] Width.—From 5.0 to 6.0 cm. [0053] Form.—Generally, elliptic-oval. Lower base leaves are often triangular with basal lobes. [0054] Profile.—Concave in cross section. [0055] Apex.—Pointed. [0056] Base.—Orbicular-obtuse. [0057] Margin.—Double saw incisions present. [0058] Texture.—Upper surface is smooth; lower surface has weak pubescence present. [0059] Color.—Young leaves have bronze anthocyanin coloration present. [0060] Venation.—Type: Pinnate, alternate. Color: Slightly reddish with very weak to weak anthocyanin coloration present. [0061] Flower buds: [0062] Pedicel.—Length: 4.5 cm. Diameter: 1.0 mm. Color: Tan4, HEX #8b5a2b. [0063] Bud.—Length: 1.0 cm. Width: 4.0 mm. Color: HotPink, HEX #ff69b4. [0064] Flowers: [0065] Bloom timing.—From April 23 to May 8 in Rheinstetten, Germany. [0066] Blooming period.—Two weeks. [0067] Number of flowers per cluster.—4 to 6. [0068] Fragrance.—Weakly sweet. [0069] Petals.—Number: 5. Length: 2.5 cm. Width: 1.7 cm. Shape: Orbicular. Margin: Entire. Texture: Smooth. [0070] Color.—When opening: Upper surface: Pink1, HEX #eea9b8. Lower surface: MistyRose, HEX #ffe4e1. Fully opened: Upper surface: White, HEX #ffffff. Lower surface: LightPink1, #ffaeb9. [0071] Sepals.—Shape: Rhomboid. Margin: Entire. Texture: Smooth. Length: 4.0 to 5.0 mm. Width: 1.0 mm. Color: Upper surface: OliveDrab4, HEX #698b22. Lower surface: OliveDrab3, HEX #9acd32. [0072] Reproductive organs: [0073] Stamens.—Number (per flower): 12. Filament length: 3.0 mm. [0074] Anthers.—Shape: Round. Length: 1.0 mm. Color: Gold3, HEX #cdad00. [0075] Pollen.—Color: Gold3, HEX #cdad00. [0076] Pistils.—Length: 2.4 cm. [0077] Style.—Length: 7.0 mm. Color: Cornsilk3, HEX #cdc8b1. [0078] Stigma.—Shape: Round. Color: NavajoWhite3, HEX #cdb38b. [0079] Fruit: Not observed to date.