Apple tree named ‘Duke Fuji’

Abstract

Duke Fuji apple tree is a naturally occurring limb sport mutation of Brak Fuji notable for its distinctive fruit, which has an attractive sold red flush. Duke Fuji colors early and evenly, allowing it to be harvested in a single picking.

Claims

1. A new and distinct Apple tree, substantially as described and illustrated herein.

Description

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

(1) FIG. 1 shows blossoms, trunk and leaves of a Duke Fuji tree;

(2) FIG. 2 shows a comparison of fruit color on Duke Fuji and Aztec trees;

(3) FIG. 3 shows a Duke Fuji tree and fruit;

(4) FIG. 4 shows fruit of Duke Fuji (left), Aztec (center) and Fubrax (right);

(5) FIG. 5 shows young fruit of Fubrax (left) and Duke Fuji (right);

(6) FIG. 6 shows fruit and leaves of Duke Fuji; and

(7) FIG. 7 shows leaves and whole and sectioned fruit of Duke Fuji.

(8) Actual colors will vary with lighting conditions; color characteristics of Duke Fuji apple tree should therefore be determined with reference to the observations described herein below, rather than from these illustrations alone.

DETAILED BOTANICAL DESCRIPTION OF THE VARIETY

(9) The attached illustrations and the following detailed botanical description of Duke Fuji apple tree are based on observations made and photographs taken during the 2014 through 2017 growing seasons at Cornaiano, Italy of trees planted in 2012 on M9 T337 virus free rootstock. All colors are described according to The Royal Horticultural Society Colour Chart. The characteristics described will vary somewhat depending upon cultural practices and climatic conditions, and will vary with location and season. Quantified measurements are expressed as an average of measurements taken from a number of individual plants of the new variety. The measurements of any individual plant or any group of plants of the new variety may vary from the stated average. Tree: Vigor.Strong, typical of Fuji varieties. Type.Ramified. Habit.Drooping. Height.1.7 m to 1.8 m (1 year old tree). 2.2 to 2.5 m (2 year old tree). Trunk diameter at 30 cm above the graft.12 mm to 16 mm (1 year old tree). 25 to 30 mm (2 year old tree). Bark texture.Smooth. Bark color.Greyed-green 197A. Type of bearing.On spurs and long shoots. Branch (fruiting branches located at around 1 m above the graft union): Length.50 cm to 100 cm. Diameter.1.5 cm+/0.1 cm at 5 cm from the stem. Crotch angle.35 to 45 degrees (1 and 2 year old tree) 55 to 60 degrees (3 year old tree). Bark color.Brown N200B; Brown N200C on older trees. Lenticel length.0.19 cm+/0.03 cm. Lenticel color.White 155A to 155B. Number of lenticels.8+/4 per cm.sup.2. One year old shoot: Length.30 cm to 50 cm (1 year old tree) 50 to 60 cm (2 year old tree). Color.Greyed-orange 177A. Pubescence.Weak. Thickness.0.8 cm+/0.1 cm (medium). Internode length.Medium, about 3 cm. Number of lenticels.Many, 8+/6 per cm.sup.2. Flower buds: Quantity per spur.6. Shape.Oval. Length.0.6 cm. Diameter.0.4 cm. Color.Greyed-purple N187A. Flowers: Diameter of fully open flower 4 cm+/0.5 cm. Relative position of petal margin.Touching. Number per cluster.5 plus king flower. Date of first bloom.April 8 (typical of Fuji). Date of full bloom.April 17. Pollination requirement.Pollenizer such as Gala required. Color at balloon stage.Red 52A. Petals (measured on king flower): Number per flower.5. Shape.Oval. Length.2.4 cm+/0.2 cm. Width.1.4 cm+/0.2 cm. Apex.Round. Base.Pointy. Margin.Unruffled. Color of upper surface.White N155D. Color of lower surface.White N155D with slight traces of red 47A on edges. Pistils: Size.Vessels of pistil are erect, number from 10 to 12, length 5.5 mm. Color.Green 138B. Stigma: Position.Above anthers (like Golden Delicious). Size.0.08 cm+/0.1 cm. Color.Yellow 5A. Style: Size.1.0 cm+/0.2 cm. Color.Yellow-green 145C. Ovary: Length.0.5 cm+/0.1 cm. Color.Yellow-green 144A. Anthers: Quantity.10+/2. Length.0.6 cm+/0.1 cm. Presence of pollen.Present, abundant. Pollen color.Yellow-orange 17A. Anther color.Yellow-orange 17A. Stamen: Length.5.5 mm. Color.Green 138B. Pedicel: Length.3 cm+/0.8 cm. Diameter.0.16 cm+/0.02 cm. Color.Yellow-green 145A. Texture.Pubescent. Sepals: Quantity.5. Color.Yellow-green 145A. Shape.Pointed, triangular. Margin.Smooth. Length.0.75 cm+/0.05 cm. Width.0.5 cm+/0.05 cm. Texture.Upper surface smooth, lower surface pubescent. Leaves: Shape.Elliptic. Length.Up to about 10 cm. Width.Up to about 6 cm. Length/width ratio.2+/0.1 to 1. Blade margin.Serrulate. Apex.Acute. Base shape.Aequilateral. Color of upper surface.Green 137A to 137B for younger trees Green 138A for older trees. Color of lower surface.Green 137C to 138A for younger trees Green 137C for older trees. Texture of upper surface.Smooth. Texture of lower surface.Pubescent. Vein color.Upper surface Yellow-green 145B. Vein color.Lower surface Red 47B. Attitude in relation to shoot.Outward. Petiole: Length.2.6 cm to 3.6 cm. Diameter.1.2 cm+/0.1 cm. Color.Green 138B. Fruit: Quantity per cluster.Up to 5. Diameter.88 mm+/8 mm. Height.88 mm+/8 mm. Weight.270 g+/25 g. Ratio of height to width.1 to 1. General shape in profile.Globose. Position of maximum diameter.50% in profile. Ribbing.Absent or weak. Crowning at calyx end.Absent or weak. Depth of eye basin.Small: 1 cm deep. Width of eye basin.2.8 cm+/0.2 cm. Bloom of skin.Medium. Greasiness of skin.Absent. Skin texture.Smooth with prominent lenticels. Background color of skin.Not visible. Amount of over color.100%. Over color of skin.Red 46A. Intensity of over color.High. Pattern of over color.Only solid flush. Amount of russet around stalk cavity.Absent or small. Amount of russet on cheeks.Absent. Area of russet around eye basin.Absent. Length of stalk.Short, 1.7 cm+/0.3 cm. Thickness of stalk.Medium, 1.8 cm 30 /0.2 cm. Stalk texture.Smooth. Stalk color.Greyed-orange 177A. Depth of stalk cavity.Medium, 1.2 cm+/0.1 cm. Width of stalk cavity.Broad, 2.8 cm+/0.1 cm. Firmness of flesh.Medium, 6.5 kg per cm.sup.2. Flesh texture.Crunchy. Aroma.Sweet. Juiciness.High. Brix.14 to 15. Flesh color.Yellow 13D. Number of lenticels.5 to 8 per cm.sup.2. Lenticel diameter.Medium, up to 1.5 mm. Color of lenticels.Greyed-yellow 160B. Locules.5 per fruit; width 0.4 cm+/0.1 cm. Aperture of locules.Moderately open. Seeds: Quantity per fruit.Up to 2 per chamber, up to 10 per fruit. Shape.Pointed. Length.0.8 cm+/0.1 cm. Width.0.5 cm+/0.1 cm. Color.Greyed-orange 166C. Harvest: Time for harvest.Mid-October, similar to other mid-season Fuji-type varieties. Number of picks.1. Amount of fruit produced per tree per harvest.25 kg+/2 kg. Disease resistance/susceptibility.None noted; same as other Fuji-type. varieties Market use.Fresh. Storageability.Up to 7 months in controlled atmosphere storage.