USPP34880P2 - Blackberry plant named ‘Celestial’ - Google Patents

Blackberry plant named ‘Celestial’ Download PDF

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USPP34880P2
USPP34880P2 US17/697,900 US202217697900V USPP34880P2 US PP34880 P2 USPP34880 P2 US PP34880P2 US 202217697900 V US202217697900 V US 202217697900V US PP34880 P2 USPP34880 P2 US PP34880P2
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blackberry
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Michael A. Hardigan
Chad E. Finn
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  • the new blackberry plant claimed is of the variety denominated ‘Celestial’ Rubus subg. Rubus Watson.
  • the present invention relates to a new and distinct blackberry cultivar designated ‘Celestial’ and botanically known as Rubus subg. Rubus Watson.
  • This new thornless blackberry cultivar was discovered in Corvallis, Oreg. in July 2015, and is the result of a 2012 cross between the maternal blackberry plant ‘Eclipse’ (U.S. Plant Pat. No. 30,448) and the paternal blackberry plant ORUS 3681-1 (unpatented) and contains 1 ⁇ 8 th genetics from Rubus georgicus .
  • ‘Eclipse’ was a selection from a cross of the thorny erect blackberry ORUS 1392-1 (unpatented) and thornless semi-erect blackberry ‘Triple Crown’ (unpatented).
  • ORUS 3681-1 was a selection from a cross of the thornless erect blackberry plant ‘Navaho’ (U.S. Plant Pat. No. 6,679) and the thorny semi-erect blackberry ORUS 1726-3 (unpatented) and contains 1 ⁇ 4 th wild genetics from Rubus georgicus .
  • ‘Celestial’ thornlessness is originally derived from ‘Merton Thornless’ (U.S. Plant Pat. No. 571).
  • the original seedling of the new cultivar was asexually propagated in Benton County, Oreg.
  • the new cultivar was established in vitro from a cane cutting and microcuttings have been taken and rooted from this sort of culture.
  • the cultivar was referred to as “ORUS 4670-1” internally as an experimental designation prior to release.
  • the present invention has been found to be stable and reproduce true to type through successive asexual propagations.
  • the new cultivar is thornless and possesses a semi-erect growth habit.
  • the new cultivar has outstanding plant vigor, the highest among any semi-erect plant so far released by the USDA-ARS-HCRU breeding program in Corvallis, Oreg. and at least as high as ‘Chester Thornless’ (unpatented).
  • the new cultivar has shown minimal foliar heat stress and low fruit UV damage in years when other semi-erect standards experienced high temperature stress in Oregon, possibly due to the partial wild R. georgicus and southeastern blackberry pedigree.
  • the new cultivar ripens 7-14 days earlier than ‘Chester Thornless’ with similarly high yields of fruit with significantly improved flavor (sweet and aromatic when firm), while ripening at a roughly similar time to ‘Triple Crown’ with much higher yields.
  • the new cultivar has a long production window for fresh market that extends 2 weeks beyond ‘Triple Crown’ despite ripening starting at a similar time.
  • the new cultivar produces small-to-medium sized berries that are slightly larger than ‘Chester Thornless’ berries and smaller than ‘Triple Crown’, and the berries are firmer and have lower defects than either previous standard.
  • the new cultivar appears to combine the high plant vigor and exceptional yields of semi-erect varieties like ‘Chester Thornless’ with the improved eating quality and flavor of more recent, albeit lower yielding semi-erect varieties from the Pacific Northwest such as ‘Eclipse’, ‘Galaxy’ (U.S. Plant Pat. No. 30,062) and ‘Twilight’ (U.S. Plant Pat. No. 30,879), while also introducing some improvements in heat tolerance. No significant disease resistance or susceptibility has been observed in ‘Celestial’.
  • This new blackberry plant is illustrated by the accompanying photographs that show the plants, ripening fruit morphology, and harvested fruit; the colors shown are as true as can be reasonably obtained by conventional photographic procedures.
  • FIG. 1 shows an example of a fruiting cluster with ripe ‘Celestial’ fruit.
  • FIG. 2 shows a close-up example of the morphology of ‘Celestial’ fruit and how it appears on the plant during ripening.
  • FIG. 3 shows a clamshell of ‘Celestial’ fruit after 7 days of refrigerated storage at ⁇ 4° C. (right) compared to a clamshell of ‘Chester Thornless’ fruit (left).
  • FIG. 4 shows a flat of harvested ‘Celestial’ fruit (right) compared to a flat of ‘Chester Thornless’ fruit (left).
  • FIG. 5 shows a plot of entire 3 year old ‘Celestial’ plants during flowering season in early July.
  • FIG. 6 shows the morphology of a ‘Celestial’ flower.
  • Table 1 shows plant characteristics of the new cultivar compared with plant characteristics of the blackberry plant ‘Twilight’. Characteristics include plant vigor, growth habit, date of bud-break, presence of spines further than 0.6 m from the soil surface, presence of spines less than 0.6 m from the soil surface, weight of primary fruit, uniformity of berry shape, fruit firmness, fruit flavor, fruit soluble solids (%; in Brix), fruit pH, fruit titratable acidity (% as citric acid), and yield (actual kg ⁇ plt- 1 ). Fruit measurements are from 2020 trial data collected from OSU-NWREC (Aurora, Oreg.).
  • Table 2 shows floricane and mature primocane characteristics of the new cultivar compared with floricane and mature primocane characteristics of the blackberry plant ‘Twilight’. Characteristics include diameter at base, diameter at midpoint, diameter at terminus, internode length at base, internode length at midpoint, internode length at terminus, presence of spines further than 0.6 m from the soil surface, presence of spines less than 0.6 m from the soil surface, floricane color at base, floricane color at midpoint, floricane color at terminus, floricane lateral length, floricane lateral strength, primocane color at base, primocane color at midpoint, primocane color at terminus, and floricane length (range).
  • Primocane characteristics include mature compound leaf width, mature compound leaf length, number of leaflets per primocane compound leaf, mature leaflet shape, mature leaflet apex, mature leaflet base, mature terminal leaflet width, mature terminal leaflet length, mature first lateral leaflet width, mature first lateral leaflet length, leaflet margin, leaflet serration teeth length, leaflet serration teeth width at base, spine presence on leaves, pubescence on primocane leaflet: upper surface, pubescence on primocane leaflet: undersurface, primocane leaf color abaxial, primocane leaf color adaxial, petiole length, petiole color: upper surface, petiole color: undersurface, petiolule length: terminal leaflet, petiolule length: first distal leaflet, petiolule color: abaxial, petiolule color:
  • Table 4 shows floricane foliage characteristics of the new cultivar compared with floricane foliage characteristics of the blackberry plant ‘Twilight’.
  • Floricane characteristics include mature compound leaf width, mature compound leaf length, number of leaflets per floricane compound leaf, mature leaflet shape, mature leaflet apex, mature leaflet base, mature terminal leaflet width, mature terminal leaflet length, mature first lateral leaflet width, mature first lateral leaflet length, leaflet margin, leaflet serration teeth length, leaflet serration teeth width at base, spine presence on leaves, pubescence on floricane leaflet: upper surface, pubescence on floricane leaflet: undersurface, floricane leaf color abaxial, floricane leaf color adaxial, petiole length, petiole color: upper surface, petiole color: undersurface, petiolule length: terminal leaflet, petiolule length: first distal leaflet, petiolule color: abaxial, petiolule color: adaxial, stipule length
  • Table 5 shows flower and flowering characteristics of the new cultivar compared with flower and flowering characteristics of the blackberry plant ‘Twilight’ .
  • Flower and flowering characteristics include date 1st bloom, date full bloom, date last bloom, petal color, number flowers per cluster, number of petals per flower, flower diameter, petal length, petal width, and number of sepals per flower.
  • Table 6 shows fruit and fruiting characteristics of the new cultivar compared with fruit and fruiting characteristics of the blackberry plant ‘Twilight’.
  • Fruit and fruiting characteristics include date 5% of fruit were ripe, date 50% of fruit were ripe, date 95% of fruit were ripe, weight of primary fruit, weight of secondary fruit, weight of tertiary fruit, diameter of primary fruit at equator, diameter of 2° fruit at equator, diameter of 3° fruit at equator, diameter of 1° fruit at poles: tip, diameter of 1° fruit at poles: base, diameter of 2° fruit at poles: tip, diameter of 2° fruit at poles: base, diameter of 3° fruit at poles: tip, diameter of 3° fruit at poles: base, berry length primary fruit, berry length 2° fruit, berry length 3° fruit, ratio of primary fruit length to width, shape description, uniformity of berry shape, color when full ripe, number of drupelets per fruit, individual seed weight, glossiness, firmness, flavor, texture
  • ‘Celestial’ differs from the female parent blackberry plant ‘Eclipse’ in that it has a more vigorous plant with greater heat tolerance and significantly greater yields.
  • the fruit are slightly smaller than ‘Eclipse’, but it produces larger numbers with a higher number of fruits per lateral.
  • the flavor is of similar quality, while the fruit are slightly less glossy, and suffer fewer defects under high temperatures.
  • the fruit have slightly lower sweetness (13.01% Brix) and acidity (10.10% citric acid) compared to ‘Eclipse’ with slightly higher sweetness (13.38% Brix) and acidity (11.30% citric acid), but still a pleasant sweet and aromatic flavor with low bitter aftertaste.
  • ‘Celestial’ differs from the male parent blackberry plant ORUS 3681-1 in that it is thornless with a slightly less erect growth habit, and significantly greater yields.
  • the fruit are slightly less glossy than ORUS 3681-1, but have better firmness and flavor, much better shape and uniformity, and lower seediness.
  • ‘Celestial’ differs from the commercial trailing varieties ‘Chester Thornless’ and ‘Twilight’ in that it is 10-14 days earlier ripening than ‘Chester Thornless’ and begins ripening at a similar time to ‘Twilight’ but continues for a longer period. ‘Celestial’ has similar or higher fruit quality after 7 days in refrigerated storage in plastic clam shell packaging at 4° C. to ‘Chester Thornless’ and similar to ‘Twilight’.
  • the ‘Celestial’ fruit are smaller than ‘Twilight’ and slightly larger than ‘Chester Thornless’, with yields that are similar to or better than ‘Chester Thornless’ and significantly higher than ‘Twilight’ at the OSU-NWREC in Aurora, Oreg.
  • the fruit flavor is mildly sweet and aromatic, with a flavor slightly less strong than ‘Twilight’ but much stronger, sweeter, and less tart than ‘Chester Thornless’. Both the plant and fruit appear somewhat more resistant to heat-related stress and defects than ‘Chester Thornless’ and ‘Twilight’.

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Abstract

A new and distinct blackberry cultivar that originated from seed produced from a cross between the thornless semi-erect maternal blackberry plant ‘Eclipse’ and the thorny erect paternal blackberry plant ORUS 3681-1, the latter of which introduces genetics from cultivated and wild Rubus germplasm from the southeastern U.S. This new blackberry cultivar can be distinguished by its high plant vigor, exceptional yields of small-to-medium sized berries with high gloss, low defects, excellent flavor and fruit quality, and high heat tolerance. The berries are well suited for fresh eating, with good sweetness, aroma, and gloss when picked firm. The new and distinct blackberry variety has fruit that are borne on vigorous canes which contain the ‘Merton Thornless’ source of genetic thornlessness.

Description

Latin name of the genus and species of the plant claimed: ‘CELESTIAL’ is a blackberry plant that is Rubus subg. Rubus Watson.
Variety denomination: The new blackberry plant claimed is of the variety denominated ‘Celestial’ Rubus subg. Rubus Watson.
BACKGROUND OF THE NEW PLANT
The present invention relates to a new and distinct blackberry cultivar designated ‘Celestial’ and botanically known as Rubus subg. Rubus Watson. This new thornless blackberry cultivar was discovered in Corvallis, Oreg. in July 2015, and is the result of a 2012 cross between the maternal blackberry plant ‘Eclipse’ (U.S. Plant Pat. No. 30,448) and the paternal blackberry plant ORUS 3681-1 (unpatented) and contains ⅛th genetics from Rubus georgicus. ‘Eclipse’ was a selection from a cross of the thorny erect blackberry ORUS 1392-1 (unpatented) and thornless semi-erect blackberry ‘Triple Crown’ (unpatented). ORUS 3681-1 was a selection from a cross of the thornless erect blackberry plant ‘Navaho’ (U.S. Plant Pat. No. 6,679) and the thorny semi-erect blackberry ORUS 1726-3 (unpatented) and contains ¼th wild genetics from Rubus georgicus. ‘Celestial’ thornlessness is originally derived from ‘Merton Thornless’ (U.S. Plant Pat. No. 571). The original seedling of the new cultivar was asexually propagated in Benton County, Oreg. The new cultivar was established in vitro from a cane cutting and microcuttings have been taken and rooted from this sort of culture. The cultivar was referred to as “ORUS 4670-1” internally as an experimental designation prior to release. The present invention has been found to be stable and reproduce true to type through successive asexual propagations.
SUMMARY OF THE NEW PLANT
The following are the most outstanding and distinguishing characteristics of this new cultivar when grown under normal horticultural practices in Oregon. The new cultivar is thornless and possesses a semi-erect growth habit. The new cultivar has outstanding plant vigor, the highest among any semi-erect plant so far released by the USDA-ARS-HCRU breeding program in Corvallis, Oreg. and at least as high as ‘Chester Thornless’ (unpatented). The new cultivar has shown minimal foliar heat stress and low fruit UV damage in years when other semi-erect standards experienced high temperature stress in Oregon, possibly due to the partial wild R. georgicus and southeastern blackberry pedigree. The new cultivar ripens 7-14 days earlier than ‘Chester Thornless’ with similarly high yields of fruit with significantly improved flavor (sweet and aromatic when firm), while ripening at a roughly similar time to ‘Triple Crown’ with much higher yields. The new cultivar has a long production window for fresh market that extends 2 weeks beyond ‘Triple Crown’ despite ripening starting at a similar time. The new cultivar produces small-to-medium sized berries that are slightly larger than ‘Chester Thornless’ berries and smaller than ‘Triple Crown’, and the berries are firmer and have lower defects than either previous standard. Thus, the new cultivar appears to combine the high plant vigor and exceptional yields of semi-erect varieties like ‘Chester Thornless’ with the improved eating quality and flavor of more recent, albeit lower yielding semi-erect varieties from the Pacific Northwest such as ‘Eclipse’, ‘Galaxy’ (U.S. Plant Pat. No. 30,062) and ‘Twilight’ (U.S. Plant Pat. No. 30,879), while also introducing some improvements in heat tolerance. No significant disease resistance or susceptibility has been observed in ‘Celestial’.
BRIEF DESCRIPTION OF THE PHOTOGRAPHS
This new blackberry plant is illustrated by the accompanying photographs that show the plants, ripening fruit morphology, and harvested fruit; the colors shown are as true as can be reasonably obtained by conventional photographic procedures.
FIG. 1 shows an example of a fruiting cluster with ripe ‘Celestial’ fruit.
FIG. 2 shows a close-up example of the morphology of ‘Celestial’ fruit and how it appears on the plant during ripening.
FIG. 3 shows a clamshell of ‘Celestial’ fruit after 7 days of refrigerated storage at ˜4° C. (right) compared to a clamshell of ‘Chester Thornless’ fruit (left).
FIG. 4 shows a flat of harvested ‘Celestial’ fruit (right) compared to a flat of ‘Chester Thornless’ fruit (left).
FIG. 5 shows a plot of entire 3 year old ‘Celestial’ plants during flowering season in early July.
FIG. 6 shows the morphology of a ‘Celestial’ flower.
 DETAILED DESCRIPTION OF THE NEW CULTIVAR
The following description of ‘Celestial’ is based on observations taken from 2016 to 2020 growing seasons in trials in Corvallis and Aurora, Oreg. 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. ‘Celestial’ has not been observed under all possible environmental conditions. Color terminology follows The Royal Horticultural Society Colour Chart. London (R.H.S.) (5th edition, 2007).
Table 1 shows plant characteristics of the new cultivar compared with plant characteristics of the blackberry plant ‘Twilight’. Characteristics include plant vigor, growth habit, date of bud-break, presence of spines further than 0.6 m from the soil surface, presence of spines less than 0.6 m from the soil surface, weight of primary fruit, uniformity of berry shape, fruit firmness, fruit flavor, fruit soluble solids (%; in Brix), fruit pH, fruit titratable acidity (% as citric acid), and yield (actual kg·plt-1). Fruit measurements are from 2020 trial data collected from OSU-NWREC (Aurora, Oreg.).
TABLE 1
Characteristic Celestial Twilight
Plant vigor Very High High
Growth habit Semi-erect Semi-erect
Date of budbreak Week 2, Week 1,
March (2022) March (2022)
Presence of spines further than Absent Absent
0.6 m from the soil surface
Presence of spines less than Absent Absent
0.6 m from the soil surface
Weight of primary fruit 6.3 g 8.4 g
Uniformity of berry shape Very good Excellent
Fruit firmness Very good Very good
Fruit flavor Very Good Excellent
Fruit soluble solids (%; in Brix) 13.01 14.53
Fruit pH 3.70 3.64
Fruit titratable acidity 10.10 10.90
(% as citric acid)
Yield (actual kg · plt-1) 10.64 6.26
Table 2 shows floricane and mature primocane characteristics of the new cultivar compared with floricane and mature primocane characteristics of the blackberry plant ‘Twilight’. Characteristics include diameter at base, diameter at midpoint, diameter at terminus, internode length at base, internode length at midpoint, internode length at terminus, presence of spines further than 0.6 m from the soil surface, presence of spines less than 0.6 m from the soil surface, floricane color at base, floricane color at midpoint, floricane color at terminus, floricane lateral length, floricane lateral strength, primocane color at base, primocane color at midpoint, primocane color at terminus, and floricane length (range).
TABLE 2
Characteristic Celestial Twilight
Diameter at base 1.74 cm 2.00 cm
Diameter at midpoint 1.27 cm 1.23 cm
Diameter at terminus 0.37 cm 0.37 cm
Internode length at base 8.58 cm 11.93 cm 
Internode length at midpoint 8.72 cm 2.87 cm
Internode length at terminus 4.01 cm 2.87 cm
Presence of spines further than Absent Absent
0.6 m from the soil surface
Presence of spines less than Absent Absent
0.6 m from the soil surface
Floricane color at base RHS 144B RHS 146A
Floricane color at midpoint RHS 183B RHS 144A w/
RHS 175A tint
Floricane color at terminus RHS 144A RHS 144A
Floricane lateral length Medium-long Medium
Floricane lateral strength Medium Medium
Primocane color at base RHS N199D + 77A RHS 144A
Primocane color at midpoint RHS 184A + RHS 144A w/
N144A RHS 176A streaks
Primocane color at terminus RHS 144A RHS 144A w/
RHS 185A tint
Floricane length (range) NA (semi-erect NA (semi-erect
mgmt.) mgmt.)
Table 3 shows primocane foliage characteristics of the new cultivar (no primocane foliage information is available for program semi-erect cultivar standard ‘Twilight’). Primocane characteristics include mature compound leaf width, mature compound leaf length, number of leaflets per primocane compound leaf, mature leaflet shape, mature leaflet apex, mature leaflet base, mature terminal leaflet width, mature terminal leaflet length, mature first lateral leaflet width, mature first lateral leaflet length, leaflet margin, leaflet serration teeth length, leaflet serration teeth width at base, spine presence on leaves, pubescence on primocane leaflet: upper surface, pubescence on primocane leaflet: undersurface, primocane leaf color abaxial, primocane leaf color adaxial, petiole length, petiole color: upper surface, petiole color: undersurface, petiolule length: terminal leaflet, petiolule length: first distal leaflet, petiolule color: abaxial, petiolule color: adaxial, stipule length, and stipule width.
TABLE 3
Characteristic Celestial
Mature compound leaf width 17.83 cm 
Mature compound leaf length 15.35 cm 
Number of leaflets per primocane Usually 3-5
compound leaf
Mature leaflet shape Ovate
Mature leaflet apex Broadly acuminate
Mature leaflet base Acute
Mature terminal leaflet width 5.78 cm
Mature terminal leaflet length 8.25 cm
Mature first lateral leaflet width 5.00 cm
Mature first lateral leaflet length 7.68 cm
Leaflet margin Double serrate
Leaflet serration teeth length 0.30 cm
Leaflet serration teeth width at 0.14 cm
base
Spine presence on leaves Absent
Pubescence on primocane leaflet: None
upper surface
Pubescence on primocane leaflet: Medium
undersurface
Primocane leaf color abaxial RHS 147B
Primocane leaf color adaxial RHS 147A
Petiole length 6.27 cm
Petiole color: upper surface RHS 177B
Petiole color: undersurface RHS 177A
Petiolule length: terminal leaflet 3.42 cm
Petiolule length: first distal leaflet 2.37 cm
Petiolule color: abaxial RHS 144D
Petiolule color: adaxial RHS 177A
Stipule length 1.91 cm
Stipule width 0.46 cm
Dormant cane average length 382.5 cm 
Dormant cane average diameter 17.33 (base) 12.4 (midpoint)
Dormant cane intensity of Strong
anthocyanin
Dormant cane number of 8.3
branches
Dormant cane cross section shape Rounded to angular
Table 4 shows floricane foliage characteristics of the new cultivar compared with floricane foliage characteristics of the blackberry plant ‘Twilight’. Floricane characteristics include mature compound leaf width, mature compound leaf length, number of leaflets per floricane compound leaf, mature leaflet shape, mature leaflet apex, mature leaflet base, mature terminal leaflet width, mature terminal leaflet length, mature first lateral leaflet width, mature first lateral leaflet length, leaflet margin, leaflet serration teeth length, leaflet serration teeth width at base, spine presence on leaves, pubescence on floricane leaflet: upper surface, pubescence on floricane leaflet: undersurface, floricane leaf color abaxial, floricane leaf color adaxial, petiole length, petiole color: upper surface, petiole color: undersurface, petiolule length: terminal leaflet, petiolule length: first distal leaflet, petiolule color: abaxial, petiolule color: adaxial, stipule length, and stipule width.
TABLE 4
Characteristic Celestial Twilight
Mature compound leaf width 16.55 cm  16.65 cm 
Mature compound leaf length 14.30 cm  13.44 cm 
Number of leaflets per primocane Usually 3-5 Usually 3
compound leaf
Mature leaflet shape Ovate Ovate
Mature leaflet apex Broadly acuminate Acute
Mature leaflet base Acute Roundly truncate
Mature terminal leaflet width 6.97 cm 7.25 cm
Mature terminal leaflet length 9.90 cm 9.25 cm
Mature first lateral leaflet width 4.83 cm 6.43 cm
Mature first lateral leaflet length 8.62 cm 8.52 cm
Leaflet margin Double serrate Serrated
Leaflet serration teeth length 0.38 cm 0.33 cm
Leaflet serration teeth width at 0.25 cm 0.38 cm
base
Spine presence on leaves Absent Absent
Pubescence on primocane leaflet: None Light
upper surface
Pubescence on primocane leaflet: Medium Heavy, dense
undersurface
Primocane leaf color abaxial RHS 147B RHS 137A
Primocane leaf color adaxial RHS N137A RHS 138B
Petiole length 4.03 cm 5.72 cm
Petiole color: upper surface RHS 146 D RHS 165A
Petiole color: undersurface RHS 146 D RHS N144D
Petiolule length: terminal leaflet 2.34 cm 1.52 cm
Petiolule length: first distal leaflet 0.58 cm 2.11 cm
Petiolule color: abaxial RHS 146 D RHS 165A
Petiolule color: adaxial RHS 146 D RHS N144D
Stipule length 1.11 cm 1.00 cm
Stipule width 0.51 cm 0.24 cm
Table 5 shows flower and flowering characteristics of the new cultivar compared with flower and flowering characteristics of the blackberry plant ‘Twilight’ . Flower and flowering characteristics include date 1st bloom, date full bloom, date last bloom, petal color, number flowers per cluster, number of petals per flower, flower diameter, petal length, petal width, and number of sepals per flower.
TABLE 5
Characteristic Celestial Twilight
Date 1st bloom 12-May 13-May
Date full bloom 20-May 20-May
Date last bloom 28-June 30-May
Petal color RHS NN155D RHS 69C
Number flowers per cluster 12.00 8.83
Number of petals per flower  5.17 5.33
Flower diameter 3.23 cm 3.24 cm
Petal length 1.55 cm 1.43 cm
Petal width 1.27 cm 1.13 cm
Number of sepals per flower  5.00 4.83
Peduncle length (cm) 13.39 3.67
Rachis length (cm) 20.43 10.85 
Peduncle color RHS 144A RHS N144A
streaked w/RHS
185A
Cyme type Elongate simple cyme Elongate simple cyme
Table 6 shows fruit and fruiting characteristics of the new cultivar compared with fruit and fruiting characteristics of the blackberry plant ‘Twilight’. Fruit and fruiting characteristics include date 5% of fruit were ripe, date 50% of fruit were ripe, date 95% of fruit were ripe, weight of primary fruit, weight of secondary fruit, weight of tertiary fruit, diameter of primary fruit at equator, diameter of 2° fruit at equator, diameter of 3° fruit at equator, diameter of 1° fruit at poles: tip, diameter of 1° fruit at poles: base, diameter of 2° fruit at poles: tip, diameter of 2° fruit at poles: base, diameter of 3° fruit at poles: tip, diameter of 3° fruit at poles: base, berry length primary fruit, berry length 2° fruit, berry length 3° fruit, ratio of primary fruit length to width, shape description, uniformity of berry shape, color when full ripe, number of drupelets per fruit, individual seed weight, glossiness, firmness, flavor, texture of fruit when chewed, drupelet skin resistance to abrasion, ease of separation of fruit from pedicel, machine harvestability, resistance to heat damage of fruit, berries per inflorescence—mean, berries per inflorescence range, soluble solids (%; in Brix), pH, titratable acidity (% as citric acid), and yield (actual kg·plt-1). Fruit chemistry data is from 2020 field season at OSU-NWREC.
TABLE 6
Characteristic Celestial Twilight
Date 5% of fruit were ripe 20-July 10-July
Date 50% of fruit were ripe 31-July 21-July
Date 95% of fruit were ripe 24-August 9-August
Weight of primary fruit 6.50 g 8.03 g
Weight of secondary fruit 5.60 g 5.91 g
Weight of tertiary fruit 5.60 g 6.00 g
Diameter of primary fruit at equator 2.13 cm 2.16 cm
Diameter of 2° fruit at equator 1.78 cm 2.22 cm
Diameter of 3° fruit at equator 1.72 cm 2.03 cm
Diameter of 1° fruit at poles: tip 1.69 cm 1.70 cm
Diameter of 1° fruit at poles: base 1.69 cm 2.18 cm
Diameter of 2° fruit at poles: tip 1.43 cm 1.70 cm
Diameter of 2° fruit at poles: base 1.52 cm 2.08 cm
Diameter of 3° fruit at poles: tip 1.44 cm 1.61 cm
Diameter of 3° fruit at poles: base 1.44 cm 1.96 cm
Berry length primary fruit 3.00 cm 2.85 cm
Berry length 2° fruit 2.60 cm 2.51 cm
Berry length 3° fruit 2.22 cm 2.47 cm
Ratio of primary fruit length to 1.3 1.32
width
Shape description Blunt conical Blocky
Uniformity of berry shape Medium Very Consistent
Color when full ripe RHS 203A RHS 203A
Number of drupelets per fruit 112 68.50
Individual seed weight 2.67 mg 2.96 mg
Glossiness Medium Very glossy
Firmness Very firm Very firm
Flavor Very good Excellent
Texture of fruit when chewed Very good Very good
Drupelet skin resistance to abrasion Excellent Excellent
Ease of separation of fruit from Easy Medium
pedicel
Machine haryestability Good Good
Resistance to heat damage of fruit Very good Good
Berries per inflorescence - mean 24.33 7.50
Berries per inflorescence range 12-39 7-8
Soluble solids (%; in Brix) 13.01 14.53
pH 3.70 3.64
Titratable acidity (% as citric acid) 10.10 10.90
Yield (actual kg · plt-1) 10.64 6.26
COMPARISON WITH PARENTAL AND COMMERCIAL VARIETIES
‘Celestial’ differs from the female parent blackberry plant ‘Eclipse’ in that it has a more vigorous plant with greater heat tolerance and significantly greater yields. The fruit are slightly smaller than ‘Eclipse’, but it produces larger numbers with a higher number of fruits per lateral. The flavor is of similar quality, while the fruit are slightly less glossy, and suffer fewer defects under high temperatures. The fruit have slightly lower sweetness (13.01% Brix) and acidity (10.10% citric acid) compared to ‘Eclipse’ with slightly higher sweetness (13.38% Brix) and acidity (11.30% citric acid), but still a pleasant sweet and aromatic flavor with low bitter aftertaste.
‘Celestial’ differs from the male parent blackberry plant ORUS 3681-1 in that it is thornless with a slightly less erect growth habit, and significantly greater yields. The fruit are slightly less glossy than ORUS 3681-1, but have better firmness and flavor, much better shape and uniformity, and lower seediness.
‘Celestial’ differs from the commercial trailing varieties ‘Chester Thornless’ and ‘Twilight’ in that it is 10-14 days earlier ripening than ‘Chester Thornless’ and begins ripening at a similar time to ‘Twilight’ but continues for a longer period. ‘Celestial’ has similar or higher fruit quality after 7 days in refrigerated storage in plastic clam shell packaging at 4° C. to ‘Chester Thornless’ and similar to ‘Twilight’. The ‘Celestial’ fruit are smaller than ‘Twilight’ and slightly larger than ‘Chester Thornless’, with yields that are similar to or better than ‘Chester Thornless’ and significantly higher than ‘Twilight’ at the OSU-NWREC in Aurora, Oreg. The fruit flavor is mildly sweet and aromatic, with a flavor slightly less strong than ‘Twilight’ but much stronger, sweeter, and less tart than ‘Chester Thornless’. Both the plant and fruit appear somewhat more resistant to heat-related stress and defects than ‘Chester Thornless’ and ‘Twilight’.

Claims (1)

We claim:
1. A new and distinct cultivar of thornless blackberry plant named ‘CELESTIAL’, substantially as illustrated and described, characterized by its plant vigor, heat tolerance, and exceptional yields of medium sized berries with good fresh eating quality, flavor, gloss, and low defects.
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Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
Research Progress Reports Oregon Raspberry & Blackberry Commision 2019-2020, retrieved from the Internet at https://oregon-berries.com/wp-content/uploads/2020/02/2019-20ORBCreports.pdf, 2 intro pages. pp. 14, 41. (Year: 2020). *
Southeast AgNet Radio Network, New Blackberries: Eclipse, Galaxy, and Twilight 2020, retrieved on Apr. 7, 2022 at https://southeastagnet.com/2020/10/21/new-blackberries-eclipse-galaxy-and-twilight/, 4 pp. (Year: 2020). *
Trademark Electronic Search System (TESS) retrieved on Aug. 3, 2022 at https://tmsearch.uspto.gov/bin/showfield?f=doc&state=4803:z1gxi3.2.3, 2 pp. (Year: 2022). *
Trademark Electronic Search System for Supernova retrieved on Apr. 7, 2022 at https://tmsearch.uspto.gov/bin/showfield?f=doc&state=4805:3nh3vy.2.3, 2 pp. (Year: 2022). *
Upov Explanatory Notes on Variety Denominations under the Upov Convention 2021 UPOV/EXN/DEN/1, retrieved on Apr. 7, 2022 at https://www.upov.int/edocs/expndocs/en/upov_exn_den.pdf, pp. 1-20. (Year: 2021). *

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