Grapevine plant named ‘PINOT ISKRA’

Abstract

A new grape variety distinguished by its resistance to downy mildew and powdery mildew, strong blistering on the upper side of the leaf blade, early-medium harvesting time (end of August in northeastern Italy), and semi-erect shoot attitude.

Claims

1. A new and distinct variety of Vitis vinifera L. plant substantially as illustrated and described herein.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a photograph showing a shoot a leaf of the new variety Pinot Iskra taken on May 24, 2017, in Rauscedo, Italy.

(2) FIG. 2 is a photograph showing a leaf of the new variety Pinot Iskra taken on May 24, 2017, in Rauscedo, Italy.

(3) FIG. 3 is a photograph showing fruit of the new variety Pinot Iskra taken on Aug. 24, 2016, in Rauscedo, Italy.

(4) FIG. 4 is a photograph showing a plant of the new variety Pinot Iskra taken on Aug. 24, 2016, in Rauscedo, Italy.

(5) The color photograph shows 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.

DETAILED DESCRIPTION

Botanical

(6) The following detailed description of the PINOT ISKRA 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.

(7) The chart used in the identification of colors described herein is The R.H.S. Colour Chart, 5.sup.th 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. Scientific name: Vitis vinifera L. Parentage: Seed parent.Sk-00-1/7. Pollen parent.Pinot Blanc. Plant: Vigor.Medium-high. Growth habit.Horizontal. Trunk: Diameter at 50 cm.29 mm (6 yr-old plants). Bark texture.Ribbed. Bark coloration.N187A. Mature cane: Diameter.9 mm. Bark texture.Ribbed. Bark coloration.RHS 179D. Shoot: Opening of the shoot tip.Fully open for young shoot. Distribution of the anthocyanin coloration of the prostrate hairs of the shoot tip.On the margin. Density of prostate hair on the shoot tip.Low. Attitude (before tying).Semi-erect. Color of the dorsal side of internodes.Green 140B and red 53A. Color of the ventral side of internodes.Green 140B and red 53A. Distribution of anthocyanin coloration on the bud scales.Absent. Number of consecutive tendrils.2 or less. Tendrils: Length.23.4 cm. Diameter.2 mm. Color.RHS 145C and RHS 179C. Leaves: Shape.Pentagonal. Ratio length/width of teeth.Medium (Chasselas blanc). Arrangement of lobes of upper lateral sinuses.Slightly overlapped (Cabernet Sauvignon). Blistering.Strong blistering of upper side of blade. Size of blade.Very small to small (Gamay N; Gewurztraminer Rg); average length 97 mm; average width 131 mm. Young leaf.Color of upper surface is green RHS 134A, color of the lower surface RHS 142B and RHS N187D, with medium prostrate hairs between main veins on the lower side of blade. Mature leaf.Color of upper surface is dark green N134A, color of the lower surface RHS 140B, with sparse prostrate hairs between main veins on the lower side of blade. Mature leaf.Five lobes. Area of anthocyanin coloration of main veins on upper side and lower of mature blade.Up to the 1.sup.st bifurcation. Goffering/depressions of mature blade between the main veins.Medium (Trebbiano Toscano, Merlot). Shape of base of petiole sinus.Brace-shaped ({) Petiole sinus base limited by vein.Not limited. Petiole length compared to length of middle vein.Slightly longer. Petiole average length.98.8 mm. Petiole color (upper surface).RHS 145B and RHS 184D. Petiole color (lower surface).RHS 145B and RHS 185B. Density of prostrate hairs on petiole.Low. Density of erect hairs on petiole.None or very low. Depth of upper lateral sinuses.Medium; average depth of the sinus 32.6 mm. Flower bud: Shape.Round. Size.Average. Color.Light brown. Bud burst.Beginning of April in Rauscedo, Italy. Flowers: Fully developed stamens and fully developed gynoecium. Insertion of 1.sup.st inflorescence.3.sup.rd and 4.sup.th node. Number of inflorescences per shoot.1 to 3. Flowering period (time of beginning of flowering).Beginning of June in Rauscedo, Italy. Average flower diameter.2 mm. Inflorescence average length.131 mm. Inflorescence average width.90 mm. Fruit: Cluster.Low weight (about 170 g), cylindrical with one or two middle size wings, compact. Time of beginning of berry ripening.Early. Berry shape.Globose. Berry length.About 13 mm. Berry width.About 13 mm. Thickness of berry skin.Medium-to-thick. Berry hilium.Visible. Color of skin (without bloom).Yellow green (154C). Texture.Soft flesh. Flesh color.RHS 150C. Anthocyanin coloration of flesh.Absent or very weak. Flavor.None/neutral. Berry shipping quality.N.a. Berry storage quality.N.a. Formation of seeds.Complete. Average number of seeds.2-3. Seed size.Medium (Pinot noir, Merlot). Seed color.Brown RHS 200C. Harvest time.Early-medium (end of August in northeastern Italy). Bunch length (peduncle excluded).Short-to-medium (about 120 to 160 mm; Gewurztraminer, Muller-Thurgau). Bunch width.Narrow (about 80 mm; Riesling, Sauvignon). Bunch density.Dense. Length of peduncle of primary bunch.Short-to-medium, (about 50 to 70 mm; Gewurztraminer, Barbera). Color of peduncle.RHS 156A and RHS N200A. Diameter of peduncle.4-5 mm. Lignification of peduncle.Up to about the middle to more than the middle. Pedicel: Average length.6-9 mm. Average diameter.1-1.5 mm. Color.RHS 145B. Grape juice characteristics: Sugars (brix).20.6. pH.3.3. Total acidity.6.1 g/l. Tartaric acid.5.52 g/l. Malic acid.1.76 g/l. Production characteristics Clusters per shoot.1.7. Grape production.3133 g/plant. No. of bunches/vine (at harvest).27.6. Average weight of the bunch.168 g. Average berry weight.1.53 g. Pruning wood weight.610 g/plant. Index of ravaz.5.13. Wine produced from grapes: Total acidity.5.7 g/l. Tartaric acid.3.3 g/l. pH.3.2. Net extract.19.1 g/l. Alcohol.13.9 g/l. Volatile acidity.0.3 g/l. Reducing sugars.1.4 g/l.

(8) TABLE-US-00002 TABLE 2 Molecular Analysis VVS2 VVMD5 VVMD7 VVMD25 VVMD27 N + N + N + 6 N + N + 8 N + N + 6 N + N + N + 10 28 10 26 14 14 14 VVMD28 VVMD32 VRZAG62 VRZAG 79 N + 2 N + N + 5 N + N + N + N + 8 N + 20 37 20 20 22
Use international coding based on N (see European project GENRES 081A basis for the preservation and utilization of Vitis genetic resources) Phenological characteristics (in Rauscedo, Italy): Germination.April 6. Flowering.June 2. Veraison (change of color).August 4. Maturation.August 29. Use: Wine grape. Disease/pest resistance: Resistance to downy mildew and powdery mildew.