Grapevine plant named ‘Sheegene 28’

Abstract

‘Sheegene 28’ is a new and distinct grapevine plant with novel characteristics that include small to medium-sized green (2.5 GY 8/8) seedless grape with a very good flavor for use as a table grape and in raisin production. The ‘Sheegene 28’ harvesting period for fresh fruit is the third week of June while the harvesting period for raisins is mid- to late-July, in the San Joaquin Valley of California.

Claims

1. A new and distinct variety of grapevine called ‘Sheegene 28’ as shown and described herein.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) FIG. 1—Shows the form, foliage, and fruit of a 4-year-old ‘Sheegene 28’ vine grown in the field in Fresno, Calif. The colors shown are as true as can be reasonably obtained by conventional photographic procedures.

DETAILED BOTANICAL DESCRIPTION

(2) The following detailed description sets forth the distinctive characteristics of ‘Sheegene 28’. The detailed description was obtained between March and November using 4-year-old plants grown in the field in California, USA. The color references are to the Munsell Color Charts for Plant Tissue, 1977 Edition by Munsell Color. Classification: Family.—Vitaceae. Botanical name.—Vitis vinifera. Common name.—Grapevine. Variety name.—‘Sheegene 28’. Plant: Plant habit and growth.—Semi-erect, lateral shoots plentiful but no secondary clusters. Age at maturity.—4 years. Size (at maturity).—Height (at maturity): 220 cm. Width (at maturity): 300 cm. Vigor.—Med-high. Productivity.—High. Rootstock.—‘Freedom’ rootstock grafted in nursery. Trunk: Size.—Diameter: 6 cm measured 35 cm above ground. Surface texture: Rough. Color.—Exterior, 5YR 5/2; Interior, 2.5 YR 4/6. Canes: Size.—Diameter: 1.5 cm measured at 5th node. Length: 210 cm. Surface texture (mature cane).—Finely ribbed. Surface texture (immature cane).—Very finely ribbed. Form (woody shoot cross section form).—Pith in center with diaphragm at nodes. Color (mature).—Color and indicate specific age: 7 months, 7.5 YR 6/8. Color (immature).—4 weeks, 7.5 GY 7/6. Internode length (upper mature sun cane).—13.5 cm. Time of bud burst.—50% bud burst on March 5. Tendrils: Form.—Mostly trifid. Size.—Large. Length.—27 cm on average. Diameter.—3.5 mm measured at middle of tendril. Texture and distribution of tendril at each node beginning at base.—Smooth with very slight ribs toward base, 0000010110110110 (0 means no tendril at that node and 1 means there is tendril at the node). Color (mature).—2 weeks 5 GY 6/6. Anthocynanin (mature).—Absent. Color (immature).—4 days, 5 GY 6/4. Anthocynanin (immature).—Absent. Growing tips (young shoot): Pubescence.—Slight cottony. Color.—2.5 GY 6/6. Anthocyanin.—Present 2.5 YR 6/8. Shape.—Fully Open. Apex.—Triangular. Leaves: Shape.—Cuneiform. Apex.—Pointed. Base.—Rounded. Margin.—Erose. Length of teeth on margin.—4 to 10 mm, average=7 mm. Shape of teeth on margin.—Irregular, both sides convex. Texture (mature leaf).—Upper surface: Slight puckering along veins. Lower surface: Slight puckering along veins. Size.—Immature, length: 1 week, average 10 cm. Immature, width: 1 week, average 10 cm. Mature, length: 2.5 weeks, average 19.5 cm. Mature, width: 2.5 weeks, average 19 cm. Color, immature leaf.—Upper surface: 5 GY 6/8. Lower surface: 5 GY 6/8. Color, mature leaf.—Upper surface: 5 GY 4/6. Lower surface: 5 GY 5/6. Venation.—Pattern: veins on upper surface are flat; veins on lower surface are raised. Color: Upper surface: 5 GY 7/6. Lower surface: 5 GY 7/6. Petiolar sinus.—Slightly open to half open. Petiole.—Length: 10.5 cm on average. Diameter: 3.5 mm on average. Color: 5 GY 6/6. Floral cluster: General description and location.—Cluster are long, carrot shaped. About half of the clusters have a large wing that sticks out horizontally. Quantity of inflorescences per cluster.—520 per cluster on average. Size.—Length: 23 cm on average. Width: 16 cm wide on average. Peduncle.—Length: 3.2 cm on average. Inflorescences.—Hermaphroditic. Stamens.—Upright; straight to slightly angled; medium length. Anthers.—General description: not distinct, small. Date of bloom.—80% bloom on May 1. Pollen amount.—Moderate. Calyptra.—Insert general description 5 segments, complete separation. Calyptra color.—5GY 5/6. Fruit: Time of year of commercial harvest and shipment.—July 15 to August 1. Cluster (primary bunches).—Generally, size: Medium to large; 392 g. Length (without peduncle): 23 cm. Width: hanging, 12 cm. Density: Medium. Peduncle length: 3 cm. Peduncle diameter: 5.5 mm. Peduncle color: 2.5 GY 6/8. Number of berries per cluster: 200. Berry.—Size: Small to medium (2 g/berry). Shape: Almost round. Uniformity: Medium. Brix content: 24° Brix on August 1. Size: Diameter: 14 mm. Length: 16 mm. Skin color: 2.5 GY 8/8. Pedicel: Length: 10 mm. Diameter: 1 mm. Color: 5 GY 5/8. Strength of attachment to berry: medium. Cluster (secondary bunches).—No secondary clusters found. Berry flesh: Color.—2.5 GY 8/6. Juice, color.—Clear. Juice production.—Medium. Thickness of skin.—Medium. Flavor.—Neutral. Fragrance.—None detected. Texture.—Soft, juicy. Seeds.—No seeds. Use.—Fresh, table grape; raisins. Disease and insect resistance: This cultivar is susceptible to the main diseases of its species, such as Erysiphe necator, Plasmopara viticola, Botrytis cinerea, Daktulosphaira vifoliae, Ceratitis capitata, Planococcus ficus, Planococcus citri, Empoasca vitis.