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NCBX1

Japanese Barberry

Denomination: 'NCBX1'
Trade name: Sunjoy Todo
Botanical Name: Berberis ×media
Applicant/Holder: North Carolina State University
Office of Technology Transfer
1021 Main Campus Drive
Raleigh, North Carolina
27606
United States of America
Breeder: Thomas Green Ranney, Arden, United States of America
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-317-7511
Application Date: 2017-04-03
Provisional Protection:: 2017-04-03
Application Number: 17-9157

Variety Description

Variety used for comparison: 'Concorde'

Summary: The plants of 'NCBX1' are larger than those of 'Concorde'. The young shoot of 'NCBX1' is dark brown purple with dark brown purple leaves while that of 'Concorde' is dark purple red to dark red with dark red leaves. The spines on the stem of 'NCBX1' are shorter than those of 'Concorde'. The leaf of 'NCBX1' is wider than that of 'Concorde'. The upper side of the leaf of 'NCBX1' is black while that of 'Concorde' is dark brown.

Description:

PLANT: deciduous, compact rounded, very dense foliage, broader than tall

BRANCH: semi-erect attitude
YOUNG SHOOT: dark brown purple (RHS 183B), leaf dark brown purple (RHS 178A)
STEM: simple spines, ranging between four to six to more than six leaves per node

LEAF: broad elliptic to obovate, spines only on apex, obtuse apex, black (duller than RHS N186A) on upper side when mature, no secondary colour, absent or weak glossiness, flat or weakly convex profile in cross-section, absent or very weak undulation of margin

FLOWER: single or raceme type
FLOWER BUD: red
PETAL: medium yellow (RHS 12A), rounded apex

FRUIT: absent

Origin & Breeding History: 'NCBX1' originated from a hybrid cross conducted in the spring of 2004 in Mills River, North Carolina, USA. The cross was made between the female parent variety Berberis x media 'Red Jewel' and the male parent variety Berberis thunbergii 'Concorde'. From the resulting progeny, a single unique seedling was selected in the summer of 2005 based on its compact plant growth habit, purple foliage colour and very low flower fertility. Asexual reproduction of 'NCBX1' was first conducted by stem cuttings in 2006 in Mills River, North Carolina, USA.

Tests & Trials: The comparative trial for 'NCBX1' was conducted in a greenhouse at Spring Meadow Nursery in Grand Haven, Michigan, USA from 2022 to 2023. The trial included a total of 10 plants each of the candidate and reference variety. All plants were grown from rooted cuttings and transplanted in 11 litre pots in 2022. Observations and measurements were taken from 10 plants, or parts of plants, of each variety on July 31, 2023. All colour determinations were made using the 2015 Royal Horticultural Society (RHS) Colour Chart. Mean differences were significant at the 5% confidence probability level based on a paired Student's t-test.


Comparison tables for 'NCBX1' with reference variety 'Concorde'

Plant height (cm)

  'NCBX1' 'Concorde'
mean 41.9 25.0
std. deviation 3.75 2.56

Plant width (cm)

  'NCBX1' 'Concorde'
mean 60.8 46.6
std. deviation 3.82 5.80

Colour of young shoot (RHS)

  'NCBX1' 'Concorde'
stem 183B 46A-B
leaf 178A N34A
Spine length on stem (mm)    
mean 5.5 8.0
std. deviation 0.94 0.78

Leaf blade width (cm)

  'NCBX1' 'Concorde'
mean 1.2 0.9
std. deviation 0.11 0.07

Colour of mature leaf blade (RHS)

  'NCBX1' 'Concorde'
upper side duller than N186A more red than 200A-B

Click on image for larger view
NCBX1
Japanese Barberry: 'NCBX1' (left) with reference variety 'Concorde' (right)

Click on image for larger view
NCBX1
Japanese Barberry: 'NCBX1' (left) with reference variety 'Concorde' (right)

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