Botanical classification: Prunus domestica x Prunus spinosa.
Varietal denomination: ‘Dhprs2’.
The present invention comprises a new and distinct cultivar of (Prunus domestica x Prunus spinosa) used as a rootstock and known by the varietal name ‘Dhprs2’. The new variety is the result of a planned breeding program conducted in Freising, Germany. The new variety is the result of a cross between Prunus domestica variety named ‘Jojo’ (female parent, unpatented) and an unnamed Prunus spinosa variety (male parent, unpatented). The new variety was first asexually reproduced via in vitro propagation using buds of one year old shoots of the original seedling plant in Freising, Germany.
‘Dhprs2’ has a similar one year old shoot color to ‘Jojo’. However, the new variety exhibits a smaller fruit size and flowers five days earlier than ‘Jojo’. Further, ‘Dhprs2’ has a similar leaf color to its male parent. However, the new variety exhibits larger leaves, larger fruits, and greater thickness of one year old shoots when compared to its male parent.
When compared to Prunus domestica variety named ‘Wangenheims’ (unpatented), ‘Dhprs2’ exhibits smaller fruits with a later ripening time. Further, the leaves of ‘Wangenheims’ are more bright green in color versus the dark green color ‘Dhprs2’ and the color of one year old shoots in August of ‘Wangenheims’ is greenish-brown versus the brown-violet color of ‘Dhprs2’.
The new variety has not been evaluated under all possible environmental conditions. The phenotype may vary with variations in environment without a change in the genotype of the plant. The new variety has been trial and field tested and has been found to retain its distinctive characteristics and remain true to type through successive asexual propagations.
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.
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 ‘Weiwa’—unpatented) 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.
Number | Name | Date | Kind |
---|---|---|---|
PP28440 | Neumuller | Sep 2017 | P3 |
Entry |
---|
UPOV hit on Prunus rootstock plant named, ‘DHPRS2’, QZ PBR 20192204, filed Sep. 9, 2019. |
CPVO application for prunus rootstock named, ‘Dhprs2’, application No. 20192204, filed Sep. 9, 2019. |
Number | Date | Country | |
---|---|---|---|
20210084860 A1 | Mar 2021 | US |
Number | Date | Country | |
---|---|---|---|
62973196 | Sep 2019 | US |