Patent Grant
PP32534
Latin name of the genus and species of the plant claimed: Vitis vinifera L.
Variety denomination: ‘KERSUS’.
This application claims the benefit of priority from QZ Community Plant Variety Office (CPVO) Application No. 20183519, filed Dec. 20, 2018.
The present application relates to a new and distinct variety of grape named ‘KERSUS’. Our new plant resulted from a controlled cross and is a selection from crossing SK-00-1/7 (unpatented) as the seed parent with Pinot Blanc (unpatented) as the pollen parent in 2005. The resulting plant was selected in 2013 when growing in a cultivated area in Udine, Italy.
‘KERSUS’ is primarily adapted to the climate and growing conditions of the temperate regions with average yearly temperature about 13° C., minimum winter temperature about −20° C., annual rainfall around 700-1500 mm of rain (e.g. North-Eastern Italy, Friuli). This region provides the necessary year-round temperatures required for it to produce and maintain a strong vigorous plant with consistent fruit production.
The ‘KERSUS’ variety is distinguished from other grape varieties due to the following unique combination of characteristics: high vigour, circular shaped leaves, medium weight fruit clusters, early-medium harvesting time (end of August in northeastern Italy), green dorsal and ventral internodes, and resistance to downy mildew and powdery mildew. A comparison of the new variety to its parents, Vitis vinifera ‘Pinot blanc’ (unpatented) and Vitis cross ‘SK-00-1/7’ (unpatented), and to the variety ‘PINOT ISKRA’ (co-pending application Ser. No. 16/602,637) is provided in Table 1.
Of the many commercial cultivars known to the present inventor, the most similar to the new grapevine ‘KERSUS’ is the male parent ‘Pinot blanc’, to which a comparison has been provided above.
Asexual reproduction of this new variety by grafting onto K5BB rootstock was first performed in February 2014 in Rauscedo, Friuli Venezia Giulia Region, Italy, and has demonstrated that the foregoing characteristics for the new cultivar come true to form, are firmly fixed, and are established and transmitted through succeeding propagations. The new cultivar reproduces true to type.
Certain characteristics of this variety may change with changing environmental conditions (such as photoperiod, temperature, moisture, soil conditions, nutrient availability, or other factors). Color descriptions and other terminology are used in accordance with their ordinary dictionary descriptions, unless the context clearly indicates otherwise. Color designations (hue/value/chroma) are made with reference to The Royal Horticultural Society (R.H.S.) Colour Chart, 5th edition, London, England, 2007.
The color photographs show typical specimens of the new variety and depict the color as nearly true as is reasonably possible to make the same in a color illustration of this character. It should be noted that colors may vary, for example due to lighting conditions at the time the photograph is taken. Therefore, color characteristics of this new variety should be determined with reference to the observations described herein, rather than from the photograph alone.
The following detailed description of the ‘KERSUS’ variety is based on observations of asexually reproduced progeny. The observed progeny are plants which were 3-5 years of age. The following detailed description concerns the plants growing in an open field taken in Rauscedo, Italy in 2016-2018. The original plant and progeny have been observed growing in a cultivated area in Rauscedo, Italy, with medium texture soil that is rich in skeleton and alluvial in nature. Temperatures in Rauscedo, Italy range from a high of 29° C. to a low of −2° C. Average rainfall is 822 mm per year, with an average rainfall during the growing season (April-September) of 453 mm. The chart used in the identification of colors described herein is The R.H.S. Colour Chart, 5th edition, except where general color terms of ordinary significance are used. The color values were determined in August-September 2018 under natural light conditions in Rauscedo, Italy.
Use international coding based on “N” (see European project GENRES 081—A basis for the preservation and utilization of Vitis genetic resources)
| Number | Date | Country | Kind |
|---|---|---|---|
| PBR 20183519 | Dec 2018 | QZ | national |
| Number | Date | Country | |
|---|---|---|---|
| 20200205332 P1 | Jun 2020 | US |
