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DrisBlackTwelve

Blackberry

Denomination: 'DrisBlackTwelve'
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
Andrea M. Pabon, Driscoll's, Inc., Watsonville, United States of America
Mark Crusha, Driscoll's, Inc., 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: 2015-12-14
Application Number: 15-8772
Grant of Rights Date: 2020-08-18
Certificate Number: 6247
Grant of Rights Termination Date: 2040-08-18

Variety Description

Variety used for comparison: 'DrisBlackNine'

Summary: The plants of 'DrisBlackTwelve' have many new canes while the plants of 'DrisBlackNine' have few new canes. The plants of 'DrisBlackTwelve' have suckering from the roots while the plants of 'DrisBlackNine' are non-suckering. There are few branches on the dormant cane of 'DrisBlackTwelve' while there are medium to many branches on the dormant cane of 'DrisBlackNine'. There are no spines on the dormant cane of 'DrisBlackTwelve' while there are many spines on the dormant cane of 'DrisBlackNine'. During rapid growth, the intensity of anthocyanin colouration on the young shoot of 'DrisBlackTwelve' is weak to medium while it is absent or very weak for that of 'DrisBlackNine'. The young shoot of 'DrisBlackTwelve' is medium green with many glandular hairs while that of 'DrisBlackNine' is light green with absent or few glandular hairs. The terminal leaflet of 'DrisBlackTwelve' is smaller than that of 'DrisBlackNine'. The leaflet of 'DrisBlackTwelve' has deep incisions along the margin while that of 'DrisBlackNine' has very shallow incisions. The upper side of the leaf of 'DrisBlackTwelve' is dark green with weak glossiness while the leaf of 'DrisBlackNine' is medium green with medium to strong glossiness. There are no prickles on the fruiting lateral of 'DrisBlackTwelve' while there are many on the fruiting lateral of 'DrisBlackNine'. The fruit of 'DrisBlackTwelve' is narrower than that of 'DrisBlackNine'. The fruit of 'DrisBlackTwelve' has a medium number of large drupelets and is circular while the fruit of 'DrisBlackNine' has many medium sized drupelets and is oblong.

Description:

PLANT: upright growth habit, many new canes, suckering from the roots

DORMANT CANE: very weak to weak anthocyanin colouration, few branches, distribution of branches predominantly over whole length of cane, angular to grooved in cross-section
SPINES: absent

YOUNG SHOOT: weak to medium intensity of anthocyanin colouration, medium green, many glandular hairs

TIME OF LEAF BUD BURST: mid-season
LEAF: predominantly three leaflets per leaf, palmate type, dark green on upper side, weak glossiness of upper side, medium sized stipules
TERMINAL LEAFLET: no lobing, u-shaped in cross-section, weak undulation of margin, medium to strong blistering between veins, deep bi-serrated incisions of margin

BEGINNING OF FLOWERING: late on previous year's and current year's cane
FLOWER: white, dense glandular hairs on pedicel

BEGINNING OF FRUIT RIPENING: late on previous year's and current year's cane
FRUITING LATERAL: no prickles
FRUIT: large length/width ratio, circular in longitudinal cross-section, black
DRUPELETS: medium number, large

Origin & Breeding History: 'DrisBlackTwelve' was discovered in Santa Cruz County, California, USA in June 2008 originating from a cross conducted in April 2006 between 'BM711', 858A5, (proprietary female parent) and 'BH936-6' (proprietary male parent). The original seedling was first asexually propagated at a nursery in Santa Cruz County, California in October 2008. Initial selection criteria included thornlessness and primocane fruiting. 'DrisBlackTwelve' was further propagated by tissue culture and root cuttings and underwent testing at a nursery in Santa Cruz County, California from 2012 to 2014.

Tests & Trials: The comparative trial for 'DrisBlackTwelve' was conducted in Chilliwack, British Columbia during the 2017 and 2018 growing seasons. Each variety consisted of 3 replicates per variety with 3 plants per replicate for a total of 9 plants of each variety. Plants were spaced approximately 1 metre apart in the row. Measured characteristics were based on 10 measurements.


Comparison tables for 'DrisBlackTwelve' with reference variety 'DrisBlackNine'

Terminal leaflet length (cm)

  'DrisBlackTwelve' 'DrisBlackNine'
mean 7.35 10.5
std. deviation 1.17 1.59

Terminal leaflet width (cm)

  'DrisBlackTwelve' 'DrisBlackNine'
mean 5.52 9.24
std. deviation 1.42 2.17

Fruit width (cm)

  'DrisBlackTwelve' 'DrisBlackNine'
mean 2.07 2.52
std. deviation 0.12 0.36

Click on image for larger view
DrisBlackTwelve
Blackberry: 'DrisBlackTwelve' (left) with reference variety 'DrisBlackNine' (right)

Click on image for larger view
DrisBlackTwelve
Blackberry: 'DrisBlackTwelve' (left) with reference variety 'DrisBlackNine' (right)

Click on image for larger view
DrisBlackTwelve
Blackberry: 'DrisBlackTwelve' (left) with reference variety 'DrisBlackNine' (right)

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