Seedless Grapevine Plant Named ‘ARD7’

Classification: The present invention relates to a new Vitis vinifera Grapevine.

Variety denomination: The new Grapevine has a varietal denomination ‘ARD7’.

BACKGROUND OF THE INVENTION

A breeding program was initiated during the late 1990's near Bakersfield in San Joaquin Valley of Central California. In 2013, during this breeding program, a new variety of Vitis vinifera was created by deliberate cross breeding of two parent plants by emasculation of the pollen bearing organ of the female and introducing pollen from another male origin. The female parent of the new variety was 10-19+5, which is a large size, meaty and juicy black table grape with a naturally sweet flavor (non-patented in the United States). The male parent (i.e. the pollen parent) of the new variety was 11704/20, a very fertile creamy white table grape variety with a small seed trace (non-patented in the United States).

TABLE 1

‘ARD7’ compared with parents & closely related variety:

‘AUTUMN

ROYAL’

‘ARD7’ 10-19+5 11704/20 (non-patented)

Seed Sterile Rudimentary Rudimentary Prominent

trace

Berry Crispy Meaty and Meaty Firm &

Texture Juicy Translucent

Bunch Lax Medium Medium loose Medium

density

The parentage of the new variety can be summarized as follows: 10-19+5 X 11704/20

An artificial pollination was created, and the result was an embryo which possessed unique genetic qualities. The rudiments resulting from the above pollination were embryo rescued.

In 2014 the plant was transplanted to Bakersfield in San Joaquin Valley of Central California.

It was found that the new grapevine of the present invention possesses the following combination of characteristics:

•

• (a) Forms attractive crispy seedless berries with a black skin coloration; in lax and small clusters which display a naturally sweet flavor; • (b) Commonly bears fruit during the month of June in the San Joaquin Valley of Central California, U.S.A.; • (c) Bears fruit that is firm and is well amenable for storage, handling, and shipping; and • (d) Produces 32 bunches per vine, and an average of about 2 bunches per shoot, at a total of 32 lbs. fruit per vine.

The new variety during observation to date has displayed no visible disease, and has displayed an ability to well resist cold, drought, and heat, but is sensitive to direct exposure to sun and wind. The fruit of the new variety has been found to display excellent handling and shipping qualities combined with desirable dessert eating qualities.

The new variety of the present invention has been found to undergo asexual propagation beginning in 2015 near Bakersfield in the San Joaquin Valley of Central California, U.S.A. by bud grafting on mature ‘Thompson Seedless’ rootstock (non-patented in the United States). Such asexual propagation has been conducted thereafter in successive years to date and has shown that the characteristics of the new variety are strictly transmissible from one generation to another. Accordingly, the new variety undergoes asexual propagation in a true to type manner.

SUMMARY OF THE INVENTION

The new variety ‘ARD7’ is a black seedless table grape with a high production, e.g., about 32 bunches per vine, and an average of about 2 bunches per shoot. Asexual reproduction by micro propagation of the new variety as performed near Bakersfield, California, U.S.A., shows that the forgoing and other distinguishing characteristics come true to form and are established and transmitted through succeeding propagations.

BRIEF DESCRIPTION OF THE DRAWING

The accompanying photographic illustration shows typical six-year-old specimens of the new variety, vegetatively propagated, in color as nearly true as it is reasonably possible to make in a color illustration of this character. Colors in the photograph may differ from the color values cited in the detailed botanical description below, which accurately describes the colors of the new Grapevine.

The drawing shows leaves, stems and grapes of ‘ARD7’.

DETAILED BOTANICAL DESCRIPTION

The chart used in the identification of colors is The R.H.S. Colour Chart of The ROYAL HORTICULTURAL SOCIETY (3 rd Edition). The description is based on the observation of plants growing on ‘Thompson Seedless’ rootstock outdoors near San Joaquin Valley of Central California, U.S.A.

VINE CHARACTERISTICS:

Vigor Vigorous upright shoots

Productive capacity Bearing at a natural, average capacity.

Spur pruning.

Trunk Strong and developed.

Diameter is 3.1 inches at 4.3 inches

above ground.

Rough with a fibrous, shaggy exterior.

Light maple brown coloring Greyed

orange 166C

• Date of bud burst in Bakersfield California: February, 21 st .

YOUNG SHOOT CHARACTERISTICS:

Openness of tip Fully Open

Density of prostrate hairs on tip Sparse

Anthocyanin coloration of prostrate None

hairs on tip

Density of erect hairs on tip Medium

YOUNG LEAF CHARACTERISTICS:

Color of upper side of blade Yellow green 152A

Color of lower side of blade Yellow green 152B

Density of erect hairs between main Absent or very sparse

veins on upper side of blade

Density of erect hairs between main Absent or very sparse

veins on lower side of blade

Density of prostrate hairs on main Absent or very sparse

veins on upper side of blade

Density of prostrate hairs on main Absent or very sparse

veins on lower side of blade

SHOOT CHARACTERISTICS:

Attitude (before tying) Erect

Color of dorsal side of internodes Yellow green 144A

Color of ventral side of internodes Yellow green 145A

Color of dorsal side of nodes Yellow green 144A

Color of ventral side of nodes Yellow green 144B

Density of erect hairs on internodes Sparse

Density of prostrate hairs on Sparse

internodes

Length of tendrils 6.07 inches

Diameter of tendrils 0.07 inches

Color of tendrils Yellow green 152A

Number of tendrils at bloom 3

Positioning of first flowering and The first bunch is in the

fruiting node 3rd node

Inflorescence number per flowering 2

shoot

FLOWER CHARACTERISTICS:

Reproductive organs Fully developed stamens and

fully developed gynoecium

Flower length 0.22 inches

Flower diameter 0.13 inches

Pistil length 0.09 inches

Pistil color Green 143B

Pollen Amount Rich

Pollen color Yellow 11A

Stamen color Yellow green 145C

Stamen length 0.07 inches

Number of stamen 5

• First bloom in Bakersfield, California: April, 26 th . • Date of full bloom in Bakersfield, California: May, 1 st .

MATURE LEAF CHARACTERISTICS:

Size of blade 6 inches × 6.5 inches

Shape of blade Pentagonal

Base descriptors Pentagonal

Leaf margin Serrate

Leaf apex Acute

Blistering of upper side of blade Absent or very sparse

Depth of upper lateral sinuses Medium

Number of lobes Five

(Only varieties with lobed leaves) Closed

Arrangement of lobes of upper

lateral sinuses

Arrangement of lobes of petiole Slightly open

sinus

Length of teeth 0.5 inches

Ratio length/width of teeth Medium

Shape of teeth Mixture of both sides straight

and both sides convex

Density of prostrate hairs between Absent or very sparse

main veins on lower side of blade

Density of erect hairs on main Absent or very sparse

veins on lower side of blade

Density of erect hairs between Absent or very sparse

the main veins on upper side of

blade

Density of prostrate hairs on main Absent or very sparse

veins on upper side of blade

Length of petiole compared to Moderately shorter

length of middle vein

Top side color Green 137B

Bottom side color Yellow green 147C

Texture of upper side of blade Rough

Texture of lower side of blade Rough

Vein color on upper blade Yellow green 146D

Vein color on lower blade Yellow green 145C

Venation pattern for upper blade Netlike venation

Venation patten for lower blade Netlike venation

Petiole length 3.86 inches

Petiole diameter 0.08 inches

Petiole color Yellow green 145B

Petiole texture Smooth

• Date of beginning of berry ripening in Bakersfield California: June, 5 th .

BUNCH CHARACTERISTICS:

Size (peduncle excluded) Small

Density of berries on bunch Lax

Bunch length 6.5 inches

Bunch diameter 4.63 inches

Length of peduncle of primary bunch 6.03 inches

Diameter of peduncle of primary bunch 0.21 inches

Peduncle of primary bunch color Yellow green 145B

Peduncle texture Rough

Bunches per vine 32

Average bunch weight 1 lbs

BERRY CHARACTERISTICS:

Size Small

Length 0.83 inches

Weight 0.15 oz

Diameter 0.7 inches

Shape Broad ellipsoid

Color of skin (without bloom) Black 202A

Flesh color Yellow green 145D

Brix 25.3

Titrabable acidity percentage 0.3%

Juice 4.44 pH

Ease of detachment from pedicel Difficult

Thickness of skin Medium

Anthocyanin coloration of flesh None

Firmness of flesh Moderately firm

Particular flavor None

Formation of seeds None

Berries per bunch 111

PEDICEL CHARACTERISTICS:

Length 0.4 inches

Diameter 0.08 inches

Color Yellow green 145A

Pedicel texture Rough

WOODY SHOOT CHARACTERISTICS:

Woody shoot texture Smooth

Woody shoot color Greyed orange 165A

Woody shoot length 128 inches

Diameter 0.4 inches

Internode length 3 inches

• Market use of observed plants: Fresh market. • Age and growing conditions: Six years growing under Y system in South Joaquin Valley (hot, dry summers). • Shipping characteristics: Fruit was in cold storage. Stored in poly bags inside Styrofoam boxes with sulfur pads. After 60 Days: rachises were 75% green; 7% berry shattering; no berry wrinkling or cracks were apparent. • DNA profile: To further characterize the new variety DNA was extracted from plant samples and a DNA profile was obtained in, California USA using base pairs for 10 standard microsatellite DNA markers. The data is presented hereafter.

TABLE 2

DNA profile for ‘ARD7’

‘Microsatellite

DNA Marker Allele Sizes in Base Pairs

M 1 232 234

M 2 239 249

M 3 179 194

M 4 210 212

M 5 271 271

M 6 133 151

M 7 189 201

M 8 255 257

M 9 214 214

M 10 237 239

The ‘ARD7’ variety has not been observed under all possible environmental conditions to date. Accordingly, it is possible that the phenotypic expression may vary somewhat with changes in light intensity and duration, cultural practices, and other environmental conditions.

Additional information relating to plant and fruit disease and pest resistance or susceptibility has not been observed to date. Specification of the plant hardiness zone and the heat/cold resistance has not been observed to date.