"Prunus Rootstock Named 'Dhprs2'"

Abstract

A new and distinct prunus variety used as a rootstock that exhibits desirable disease resistance and induces a high yield of large fruits for grafted varieties.

Claims

1. A new and distinct variety of prunus rootstock plant, as illustrated and described herein.

Description

DESCRIPTION OF THE DRAWINGS

[0006] The accompanying photographic drawings illustrate the new variety at approximately 4 years of age, with the color being as nearly true as possible with color illustrations of this type.

[0007] FIG. 1 illustrates numerous plants of Dhprs2;

[0008] FIG. 2 illustrates the flowers of Dhprs2; and

[0009] FIG. 3 illustrates the fruit of Dhprs2.

DETAILED BOTANICAL DESCRIPTION

[0010] The following detailed description sets forth the characteristics of the new cultivar at approximately 6 years of age. The data which defines these characteristics were collected as a result of asexual reproductions carried out in Freising, Germany. Dhprs2 is compatible with at least varieties of Prunus domestica and Prunus salicina and induces a high yield of large fruits for grafted varieties. Dhprs2 is fully resistant to the Plum pox virus (PPV/Sharka) by means of hypersensitivity resistance. Further, the new variety exhibits good resistance to plum decline caused by Pseudomonas bacteria. Dhprs2 exhibits medium vigor (similar to prunus rootstock variety named Weiwaunpatented) with only a few suckers present. Its leaf blades are narrow, serrate, elliptical in shape, and of medium length. Its flower petals are pure white in color. Dhprs2 can be useful as a rootstock for grafting of PPV resistant varieties, as well as with varieties that are PPV sensitive. Color references are primarily to the R.H.S. Colour Chart of The Royal Horticultural Society of London and were identified under natural light.

Rootstock

[0011] Size: Medium. [0012] Vigor: Moderate. [0013] Pathogen resistance: Resistant to the Plum pox virus (PPV/Sharka) and good resistance to Pseudomonas bacteria. [0014] Rootstock performance: [0015] Root sprouts (suckering): Few. [0016] Anchorage: Good. [0017] Compatibility: Very good with Prunus domestica; also compatible with Prunus salicina. [0018] Vigor: Moderate (70% with Prunus cerasifera). [0019] Branches: [0020] Diameter: 5-18 mm. [0021] Color: RHS N200C. [0022] Lenticels: [0023] Length: 0.9-1.2 mm [0024] Width: 0.1-0.2 mm. [0025] Color: RHS N199C. [0026] Leaves: [0027] Length: 64-70 mm. [0028] Width: 42-49 mm. [0029] Form: Elliptic. [0030] Base: Obtuse-truncate. [0031] Apex: Apiculate. [0032] Margin: Crenate-serrate. [0033] Mature leaf color: [0034] Upper surface: RHS 137A. [0035] Lower surface: RHS 137C. [0036] Petiole: [0037] Length: 11-14 mm. [0038] Diameter: 1.5-1.8 mm. [0039] Color: RHS N77A. [0040] Veins: [0041] Venation type: Reticulate. [0042] Color: RHS 141D. [0043] Tree winter hardiness: High. [0044] Bud winter hardiness: High. [0045] Drought tolerance: Good.