Blackberry plant variety named ‘DrisBlackTwenty’

Abstract

A new and distinct variety of blackberry plant named DrisBlackTwenty, particularly characterized by its plant vigor, yield, fruit shelf-life, and flavor, is disclosed.

Claims

1. A new and distinct variety of blackberry plant designated DrisBlackTwenty as shown and described herein.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) This new blackberry plant is illustrated by the accompanying photographs, which show fruit of the plant, flowers, a leaf, a cane, and a plant. The colors shown are as true as can be reasonably obtained by conventional photographic procedures. The photographs are of plants that are three years old.

(2) FIG. 1 illustrates typical fruit of variety DrisBlackTwenty at various stages of development.

(3) FIG. 2 illustrates typical flowers of variety DrisBlackTwenty at various stages of development.

(4) FIG. 3 illustrates a typical leaf of variety DrisBlackTwenty.

(5) FIG. 4 illustrates a typical cane of variety DrisBlackTwenty.

(6) FIG. 5 illustrates a plant of variety DrisBlackTwenty.

DETAILED BOTANICAL DESCRIPTION

(7) The following descriptions set forth the distinctive characteristics of DrisBlackTwenty. The data that define these characteristics are based on observations taken in Los Reyes, Mexico from 2012 to 2018. This description is in accordance with UPOV terminology. Color designations, color descriptions, and other phenotypical descriptions may deviate from the stated values and descriptions depending upon variation in environmental, seasonal, climatic and cultural conditions. DrisBlackTwenty has not been observed under all possible environmental conditions. The botanical description of DrisBlackTwenty was taken from plants that were three years old. The indicated values represent averages calculated from measurements of several plants. Color references are primarily to The R.H.S. Colour Chart of The Royal Horticultural Society of London (R.H.S.) (2015 edition). Descriptive terminology follows the Plant Identification Terminology, An Illustrated Glossary, 2.sup.nd edition by James G. Harris and Melinda Woolf Harris, unless where otherwise defined. Classification: Family.Rosaceae. Botanical.Rubus L. subgenus Rubus. Common name.Blackberry. Variety name.DrisBlackTwenty. Parentage: Female parent.BN843.2 (unpatented). Male parent.BL481.3 (unpatented). Plant: Propagation.Root cuttings. Growth habit.Upright to semi-upright. Plant height.170 cm. Plant width.100 cm. Canes: Fruiting lateral length (4.sup.th lateral from tip).53.4 cm. Number of fruits per fruiting lateral.11.4. Internodal distance.4.8 cm. Dormant cane.Anthocyanin coloration: Absent or very weak. Predominant distribution of branches: Only on upper half. Cross-section: Rounded to angular. Presence of spines: Absent. Young shoots: Anthocyanin coloration (during rapid growth).Absent or very weak. Intensity of green color.RHS 143C (Strong yellow green). Young shoot length.56 cm. Young shoot diameter.0.743 cm. Young shoot texture.Medium rough. Leaves: Terminal leaflet.Length: 77.44 mm. Width: 57.28 mm. Length/width ratio: 1.35. Lobing: Absent. Shape in cross-section: V-shaped. Undulation of margin: Weak. Lateral leaflets (basal pair).Length: 57.53 mm. Width: 41.99 mm. Length/width ratio: 1.37. Rachis length between terminal leaflet and adjacent lateral leaflets.25.54 mm. Petiole.Length: 59.63 mm. Diameter: 1.46 mm. Petiole color: RHS 144A (Strong yellow-green). Leaflet.Type of incision of margin: Bi-serrate. Leaflet shape: Ovate. Leaflet texture: Soft medium. Leaflet color of lower side: RHS 146A (Moderate olive green). Leaf.Predominant number of leaflets: 5. Type: Palmate. Intensity of green color of upper side: RHS 139A (Dark green). Leaf arrangement: Alternate. Leaf venation pattern: Dichotomous. Leaf vein color: RHS 144A (Strong yellow-green). Approximate date of leaf bud burst: January-April. Stipule.Stipule length: 0.692 cm. Stipule width: 0.09 cm. Stipule texture: Medium hairy. Stipule color: RHS 138B (Moderate yellow-green). Flowers: Diameter.45.60 mm. Petal.Length: 24.20 mm. Width: 15.34 mm. Length/width ratio: 1.57. Color: RHS 155C (Greenish white) for both upper and lower sides of the petal. Number of petals per flower: 5. Petal texture: Soft medium. Shape of apex: Rounded. Shape of base: Cuneate. Petal margin: Retuse. Number of flowers observed at 3.sup.rd node from tip of lateral.2.4. Number of flowers per panicle.9. Pedicel.Length: 48.60 mm. Diameter: 1.24 mm. Pedicel color: RHS 137B (Moderate olive green). Sepal.Sepal length: 0.733 cm. Sepal width: 0.124 cm. Sepal texture: Soft medium. Sepal color: RHS 138A (Moderate yellowish green). Stigma.Stigma length: 0.00349 mm. Stigma width: 0.00328 mm. Stigma shape: Capitate. Stigma color: RHS 144B (Strong yellow-green). Style.Style length: 3.31 mm. Style width: 0.015 mm. Style shape: Elongate. Style color: RHS 145B (Light yellow-green). Ovary.Ovary length: 0.12 mm. Ovary width: 0.045 mm. Ovary shape: Capitate. Ovary color: RHS 134B (Strong yellowish green). Stamen.Stamen length: 5.8 mm. Stamen width: 0.25 mm. Stamen shape: Tetradynamous. Stamen color: RHS 155B (Yellowish white). Anther.Anther length: 1.33 mm. Anther width: 0.99 mm. Anther shape: Elongate. Anther color: RHS 155B (Yellowish white). Pollen.Pollen diameter: 0.00025 mm. Pollen shape: Oblate spheroidal. Pollen color: RHS 8B (Light greenish yellow). Peduncle.Peduncle diameter: 0.85 mm. Peduncle color: RHS 138A (Moderate yellow-green). Flower bud.Bud length: 6.91 mm. Bud width: 5.65 mm. Bud shape: Oblong. Bud color: RHS 144C (Strong yellow-green). Time of beginning of flowering.August-September. Duration of flowering.45 days. Fruit: Length of mature fruit.33.36 mm. Diameter of mature fruit.26.09 mm. Ratio of fruit length to width.1.3. Average number of drupelets per fruit.109. Drupelet diameter.2.24 mm. Fruit weight.9.2 g/fruit. Soluble solids (in brix).16.2%. Titratable acidity (as citric acid).0.93%. Seed weight.0.006 g/seed. Seed diameter.2.03 mm. Seed shape.Elliptic. Seed color.RHS 146B (Light yellow-green). Shape of fruit in longitudinal section.Medium ovate. Immature fruit color.RHS 146A (Green). Maturing fruit color.RHS 185A (Purple). Mature fruit color.RHS 202A (Black). Fruiting on current year's cane.Absent. Harvest interval on previous year's cane.October-June. Yield.18,000 kg/hectare to 22,500 kg/hectare of fruit per season from 9-month-old plants when grown in Los Reyes, Michoacan, Mexico. Date of first fruit pick.September 24. Date of last fruit pick.December 31. Market use of fruit.Fresh market. Shipping and storage characteristics.Following harvest, fruit can be stored for 10 days if maintained under cooled temperatures (e.g. at 2 Celsius) that are standard for blackberry storage. Resistance to diseases, pests, and abiotic stress: Spotted-wing drosophila (Drosophila suzukii).Moderately susceptible. Powdery mildew (Podosphaera macularis).Moderately susceptible. Fusarium wilt (Fusarium oxysporum).Resistant.

COMPARISONS TO PARENTAL AND COMMERCIAL BLACKBERRY VARIETIES

(8) DrisBlackTwenty differs from the proprietary female parent BN843.2 (unpatented) in that DrisBlackTwenty has higher vigor compared to BN843.2. Moreover, DrisBlackTwenty differs from the proprietary female parent BN843.2 in that DrisBlackTwenty is spineless, whereas BN843.2 is spiny.

(9) DrisBlackTwenty differs from the proprietary male parent BL481.3 (unpatented) in that DrisBlackTwenty has higher yield potential than BL481.3.

(10) DrisBlackTwenty differs from commercial variety Tupy (also spelled Tupi, unpatented) in that DrisBlackTwenty has no spines on dormant cane, absent or few number of glandular hairs on young shoot, a V shape of terminal leaflet in cross-section, and a medium ovate fruit shape in longitudinal section. In contrast, Tupy has spines present on dormant cane, medium number of glandular hairs on young shoot, a U shape of terminal leaflet in cross-section, and a circular to medium ovate fruit shape in longitudinal section.

(11) DrisBlackTwenty differs from commercial variety DrisBlackSeventeen (U.S. Plant Pat. No. 31,291) in that DrisBlackTwenty has an upright to semi-upright plant growth habit, no spines on dormant cane, absent or few number of glandular hairs on young shoot, and early beginning of fruit ripening on previous year's cane. In contrast, DrisBlackSeventeen has a semi-upright plant growth habit, spines present on dormant cane, many glandular hairs on young shoot, and medium beginning of fruit ripening on previous year's cane.