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DrisBlackTwentyThree

Blackberry

Denomination: 'DrisBlackTwentyThree'
Botanical Name: Rubus
Applicant/Holder: Driscoll's, Inc.
345 Westridge Drive
Watsonville, California
95076
United States of America
Breeder: Gavin R. Sills, Driscoll's, Inc., Watsonville, United States of America
Mark F. Crusha, Driscoll's, Inc., Watsonville, United States of America
Yunwen Wang, Watsonville, United States of America
John Fangary, Watsonville, United States of America
Agent in Canada: Lavery, De Billy, S.E.N.C.R.L. - LLP
1, Place Ville Marie, Bureau 4000
Montreal, Quebec
H3B 4M4
Canada
Tel: 514 397-5138
Application Date: 2020-01-08
Provisional Protection:: 2020-10-19
Application Number: 20-10364
Grant of Rights Date: 2022-08-09
Certificate Number: 6623
Exemption from compulsory licensing: Yes
Expiry date for exemption from compulsory licensing: 2024-08-09
Grant of Rights Termination Date: 2042-08-09

Note: The applicant has requested an exemption from compulsory licensing to allow time to multiply and distribute propagating material of the variety. If the exemption is granted, it may be allowed for two years from the date rights are granted for the variety.


Variety Description

Varieties used for comparison: 'DrisBlackSix' (Victoria) and 'Carmel'

Summary: The dormant cane of 'DrisBlackTwentyThree' is angular in cross-section with no spines while the dormant cane of 'Carmel' is rounded with very few small spines. The leaf of 'DrisBlackTwentyThree' has bi-serrate incisions of margin while the leaf of 'DrisBlackSix' has serrate incisions of margin. The flower of 'DrisBlackTwentyThree' is white while that of 'DrisBlackSix' is pinkish. The fruit of 'DrisBlackTwentyThree' is smaller than the fruit of 'Carmel' and narrower than the fruit of 'DrisBlackSix'. The time of flowering on the previous year`s canes begins late in the season for 'DrisBlackTwentyThree' while it begins mid-season for 'DrisBlackSix'.

Description:

PLANT: upright to semi-upright growth habit, many new canes, suckering from roots, leaf bud burst occurs early to mid-season, begins flowering and fruit ripening on previous years cane late in the season

YOUNG SHOOT (during rapid growth): medium to strong intensity of anthocyanin colouration, medium green, absent or few glandular hairs
DORMANT CANE: medium to strong intensity of anthocyanin colouration, many branches distributed over whole length, angular in cross-section, no spines
CURRENT YEAR'S CANE: no fruiting

PETIOLE: very small to small stipules
LEAF: predominantly three and five leaflets, odd-pinnate type, medium green on upper side, weak glossiness on upper side
TERMINAL LEAFLET: lobing absent, u-shaped in cross-section, absent or very weak undulation of margin, strong to very strong blistering between veins
LEAFLET: bi-serrate incisions of margin of medium depth

FLOWER: white, absent or very sparse glandular hairs on pedicel

FRUITING LATERAL: absent or very few prickles
FRUIT: small to medium length to width ratio, medium to many small to medium sized drupelets, oblong in longitudinal section, black

Origin & Breeding History: 'DrisBlackTwentyThree' originated from a cross between the proprietary line,'BN864.2', as the female parent, and 'DrisBlackEighteen, as the male parent, conducted in April 2010 in Santa Cruz County, California, USA. 'DrisBlackTwentyThree' was selected in 2012 on the basis of lack of spines, fruit size, fruit firmness and flavour. 'DrisBlackTwentyThree' was further propagated by root cuttings and underwent additional testing in Santa Cruz County, California, from 2014 to 2019.

Tests & Trials: The comparative trial for 'DrisBlackTwentyThree' was conducted in Chilliwack, British Columbia during the 2021 growing season with dormant cane traits being assessed late in the fall of 2020. There were four replicates per variety, arranged in a randomized complete block design. Each replicate consisted of 3 plants in a 2.7 metre row for a total of 12 plants per variety. Plants were spaced approximately 0.91 metres apart within the row with 3 metre inter-row spacing. Measurements were taken from 10 plants or parts of 10 plants of each variety. Mean differences were significant at the 5% confidence probability level based on a paired Student's t-test.


Comparison tables for 'DrisBlackTwentyThree' with reference varieties 'DrisBlackSix' and 'Carmel'

Fruit length (cm)

  'DrisBlackTwentyThree' 'DrisBlackSix' 'Carmel'
mean 2.69 2.75 3.29
std. deviation 0.14 0.30 0.28

Fruit width (cm)

  'DrisBlackTwentyThree' 'DrisBlackSix' 'Carmel'
mean 2.08 2.34 2.42
std. deviation 0.12 0.13 0.19

Click on image for larger view
DrisBlackTwentyThree
Blackberry: 'DrisBlackTwentyThree' (left) with reference varieties 'DrisBlackSix' (centre) and 'Carmel' (right)

Click on image for larger view
DrisBlackTwentyThree
Blackberry: 'DrisBlackTwentyThree' (left) with reference varieties 'DrisBlackSix' (centre) and 'Carmel' (right)

Click on image for larger view
DrisBlackTwentyThree
Blackberry: 'DrisBlackTwentyThree' (left) with reference varieties 'DrisBlackSix' (centre) and 'Carmel' (right)

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