CRAB APPLE TREE NAMED 'B17CRAB7'

Abstract

A new crab apple tree particularly distinguished by fruit with a distinct ellipsoid conical (ovoid) shape, long pedicel that is red (stem), and range in weight from 20-45 g. The fruit have a predominantly dark red, reddish-purple skin colour and cherry coloured red flesh. When pressed, crimson red juice is extracted that is high in acidity and polyphenols. The tree is moderately vigorous, red leaves at bloom that turn dark green during development. Flowers are pink in color when fully open. The shoots have a distinctly red colour which is clearly distinguishable from other apple cultivars, is disclosed.

Description

Genus and species: sylvestris L.

Variety denomination: ‘B17Crab7’.

BACKGROUND OF THE NEW PLANT

The present invention comprises a new and distinct variety of crab apple, botanically known as sylvestris L. and hereinafter referred to by the variety name ‘B17Crab7’. B17Crab7’ originated from an open pollinated cross conducted in 2000 between the female parent variety ‘Empire’ (unpatented) and an unknown male parent. It was bred and developed in Simcoe, Ontario, Canada. The resulting seeds were germinated in 2001 and transplanted in an orchard in 2002. One resulting seedling of ‘B17Crab7’ was selected for its fruit qualities such as showy bloom, and large fruit with red flesh. The selected seedling was propagated onto clonal M.26 rootstock for further evaluation. Trees were then planted in 2007 in replicated and randomized fashion of two trees per plot with other crab apple selections as well as the reference cultivars for further evaluation in 2007.

‘B17Crab7’ has shown uniformity and stability, as described in the following variety description information. Crab apple cultivar ‘B17Crab7’ was tested for uniformity and stability a sufficient number of generations with careful attention to uniformity of plant type and has been increased with continued observation for uniformity.

SUMMARY

The following are the most outstanding and distinguishing characteristics of this new variety when grown under normal horticultural practices in Simcoe, Ontario, Canada.

• • 1. The fruit of ‘B17Crab7’ have a distinct ellipsoid conical (ovoid) shape, long pedicel that is red (stem), and range in weight from 20-45 g;
  • 2. The fruit have a predominantly dark red, reddish-purple skin colour and cherry coloured red flesh;
  • 3. When pressed, crimson red juice is extracted that is high in acidity and polyphenols;
  • 4. The tree is moderately vigorous, red leaves at bloom that turn dark green during development;
  • 5. Flowers are pink in color when fully open; and
  • 6. The shoots have a distinctly red colour which is clearly distinguishable from other apple cultivars.

DESCRIPTION OF THE PHOTOGRAPHS

This new crab apple tree is illustrated by the accompanying photographs from October 2023 of plants grown in Simcoe, Ontario, Canada. The colors shown are as true as can be reasonably obtained by conventional photographic procedures.

FIG. 1 shows a whole tree of ‘B17Crab7’ showing foliage and fruit.

FIG. 2 shows the leaves, buds and flowers of ‘B17Crab7’.

FIG. 3 shows the flesh and seeds of the fruit of ‘B17Crab7’.

DESCRIPTION OF THE NEW VARIETY

The following detailed descriptions set forth the distinctive characteristics of ‘B17Crab7’. The data which define these characteristics was collected in Simcoe, Ontario on two year old and nine year old trees. All colour determinations were made using 2015 Royal Horticultural Society (R.H.S.) Colour Chart.

• Classification:
  • • Family.—Rosaceae.
    • Species.—Malus sylvestris L.
    • Denomination.—‘B17Crab7’.
• General:
  • • Overall shape.—Spreading.
    • Vigour.—Medium to strong vigour with many fruit.
    • Height.—3.34 M (9 years old).
    • Width.—2.02 M (9 years old).
• Trunk:
  • • Diameter.—7.45 cm (9 years old).
    • Bark texture/surface appearance.—Young: 2 years old Rough. Mature: 9 years old Rough.
    • Bark color.—Young: RHS 183A (2 years old). Mature: RHS 177A (9 years old).
    • Lenticels.—Color: RHS 162A. Shape: Ellipse. Size: Length: 3.0 mm. Width: 1.0 mm.
• Branches (9 years old).
  • • Length.—120.33 cm.
    • Width.—4.5 cm.
    • Shape in cross-section.—Spreading.
    • Color, young branches.—RHS 200B.
    • Color, mature branches.—RHS 177A.
    • Lenticels.—Color: RHS 164C. Shape: Oval. Size: Length: 1.0 mm. Width: 0.5 mm.
    • Dormant buds.—Shape: Cylindrical, Pointed. Apex: Pointed. Base: Wide, flat. Color: RHS 166A.
    • Internode length.—4.0 cm, 9 years old.
• Foliage: (9 years old).
  • • General.—Medium length to width ratio, no lobing, crenate type incisions of margin, mainly red before leaf fall.
    • Quantity of leaves per branch.—Various with branch length and age.
    • Arrangement and type.—Alternate, simple.
    • Length.—9.87 cm.
    • Width.—5.86 cm.
    • Shape.—Ovate.
    • Apex.—Pointed.
    • Base.—Round.
    • Margin.—Crenulate.
    • Texture, immature.—Upper surface: Smooth. Lower surface: Smooth.
    • Color, immature.—Upper surface: Medium Green, weak intensity of anthocyanin coloration. Lower surface: Light green/yellow.
    • Texture, mature.—Upper surface: Medium glossiness (smooth). Lower surface: Smooth.
    • Color, mature.—Upper surface: Dark Green, reddish hue, mainly red before leaf fall. Lower surface: Light Yellow/Green.
    • Venation pattern.—Pinnate.
    • Venation color, mature.—Upper surface: Reddish. Lower surface: Pinkish. Petioles: Color: RHS 183B. Length: 3.29 mm. Width: 0.94 mm. Stipules: Not observed.
• Flowers: (9 years old).
  • • Type.—Single type, medium pink on outer side at balloon stage, flat, overlapping petal arrangement.
    • Flowering date.—May 15 (on average in Simcoe, Ontario).
    • Fragrance.—Not observed.
    • Number of flowers per cluster.—5.
    • Shape of flowers.—Flat, overlapping arrangement.
    • Bud.—Length: 8.8 mm (average of 10 buds). Width: 5.2 mm (average of 10 buds).
    • Color.—RHS 145D.
• Petals: (9 years old).
  • • Quantity per flower.—5.
    • Shape.—Ovate, excluding claw.
    • Apex.—Round.
    • Base.—Pointed.
    • Margin.—Entire (smooth).
    • Length.—6.14 cm.
    • Width.—3.29 cm.
    • Color.—Upper surface: RHS 59D on marginal and middle zone, RHS NN155D on Basal Zone. Lower surface: RHS 59D.
    • Surface texture.—Upper surface: Smooth, no prominent veins. Lower surface: Smooth, no prominent veins.
• Sepals: (9 years old).
  • • Quantity per flower.—5.
    • Apex.—Pointed.
    • Base.—Round.
    • Margin.—Smooth, non serrated.
    • Length.—3.7 mm.
    • Width.—2.4 mm.
    • Color.—Upper surface: RHS 160C and RHS 183C. Lower surface: RHS 160D.
    • Surface texture.—Upper surface: Fuzzy. Lower surface: Fuzzy.
    • Pedicel.—Color: RHS N138C. Length: 13.03 mm. Width: 1.02 mm.
• Reproductive organs: (9 years old).
  • • Stamens.—Stamen quantity per flower: 17. Filament length: 6.4 mm. Anther color: RHS 166C for older stamens, RHS 162D for new.
    • Pollen amount.—Not Observed.
    • Pistils.—Stigma shape: Lobed. Stigma color: RHS 151C. Style length: 4.12 mm. Style color: RHS 151D.
    • Ovary color.—RHS 196B.
    • Ovary shape.—Oblong.
• Fruit: (9 years old).
  • • Number of fruits per cluster.—3-5.
    • Stalk.—Long.
    • Size.—Small (20-45 g) (when the trees are not thinned).
    • Shape.—Ellipsoid Conical.
    • Skin texture.—Smooth, non-glossy.
    • Skin color.—RHS 59A or RHS 187B (blush); RHS 53A and RHS 186C (ground).
    • Flesh color.—RHS 46B or RHS 53B (Range).
    • Seeds.—Reddish/brown.
    • Fruit production.—Heavy.

COMPARISON WITH PARENTAL LINE AND KNOWN VARIETY

‘B17Crab7’ is distinguished from its female parent as described in Table 1.

TABLE 1
Comparison with Female Parent
Characteristic	‘Empire’	‘B17Crab7’
Fruit surface colour	Red skin with green	Red skin
	background colour
Fruit Shape	globose	ellipsoid conical
		(ovoid) shape
Flesh colour	White	Red
Fruit size	100-150 g	30-40 g
Fruit flavour	Sweet with mild acidity	Tart, high acidity
Tree leaf colour	Green	Red early in the season,
		turning green
Flower colour	White	Pink
Juice colour	Clear	Crimson red
Pedicel length	Relatively short	Relatively long
Tree habit	Spreading	Spreading to drooping

Table 2 below shows trials for ‘B17Crab7’ were conducted from 2014 to 2017 in Simcoe, Ontario. The trials consisted of 7 trees of ‘B17Crab7’, grown on M.26 rootstock, and five trees of ‘Kerr’, grown on Bud.9 rootstock. In 2014, the trees were planted in 86 metre length rows, with 4.5 metre spacing between rows and 2 metres between trees. Mean differences were significant at the 5% confidence probability level based on a paired Student's t-test.

TABLE 2
Characteristics	‘B17Crab7’	‘Kerr’
Petiole length	3.29 cm	1.90 cm
Leaf blade length mean	9.87 cm	6.92 cm
Leaf blade width mean	5.86 cm	3.99 cm
Flower diameter	6.14 cm	4.6 cm
Color of flower petal	RHS 59C	RHS NN155D

Claims

1. A new and distinct variety of crab apple tree designated ‘B17Crab7’ as illustrated and described herein.