NCORNSP-021SHJB

Sweet Potato

Denomination: 'NCORNSP-021SHJB'
Trade name: Sweet Caroline Sweetheart Jet Black
Botanical Name: Ipomoea batatas
Applicant/Holder: North Carolina State University
Office of Technology Transfer
1021 Main Campus Drive
Raleigh, North Carolina
27606
United States of America
Breeder: G. Craig Yencho, North Carolina State University, Raleigh, United States of America
Meri K. Reeber, North Carolina State University, Raleigh, United States of America
Kenneth Pecota, North Carolina State University, Raleigh, United States of America
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-631-6241
Application Date: 2016-07-08
Application Number: 16-8969

Variety Description

Variety used for comparison: 'Bright Ideas Cordate Black'

Summary: The stem of 'NCORNSP-021SHJB' is medium to thick whereas the stem of 'Bright Ideas Cordate Black' is thin to medium thick. The leaf blade of 'NCORNSP-021SHJB' is broader than the leaf blade of 'Bright Ideas Cordate Black'. The shape of the leaf blade of 'NCORNSP-021SHJB' is cordate whereas the shape is triangular for 'Bright Ideas Cordate Black'. Excluding anthocyanin colouration, the upper side of the leaf blade of 'NCORNSP-021SHJB' is black whereas the leaf blade of 'Bright Ideas Cordate Black' is dark brown. The intensity of anthocyanin colouration of the petiole is very strong for 'NCORNSP-021SHJB' whereas the intensity is strong for 'Bright Ideas Cordate Black'. The petiole of 'NCORNSP-021SHJB' is brown purple whereas the petiole of 'Bright Ideas Cordate Black' is blue pink.

Description:

PLANT: growth habit is initially upright becoming spreading with age, strong degree of branching

STEM: brown purple (RHS N186A), medium to thick, medium to large diameter of internode, strong intensity of anthocyanin colouration of tip, strong intensity of anthocyanin colouration of node, absent or sparse pubescence of tip

PETIOLE: very strong intensity of anthocyanin colouration, brown purple (RHS N77A)
YOUNG LEAF BLADE: dark green (RHS 144A) on upper side
LEAF BLADE: cordate shape, entire margin, absent to weak degree of rugosity, black (close to RHS 202A) upper side (excluding anthocyanin colouration), black (RHS N187A) lower side, strong intensity of anthocyanin colouration of upper side, very strong intensity and very large extent of anthocyanin colouration on upper side of abaxial veins

INFLORESCENCE: few
UPPER COROLLA LOBE: light blue violet (RHS 76A) inner side

Origin & Breeding History: 'NCORNSP-021SHJB' was bred and developed by the breeders, Dr. G. Craig Yencho, Meri K. Reeber, and Dr. Kenneth V. Pecota, all employees of North Carolina State University, in Raleigh, North Carolina, USA. It originated from an open pollinated cross between the proprietary breeding line designated 'NC6751-045ORN', as the female parent, and an unknown male parent. This cross was part of the summer advanced ornamental replicated trials that occurred between June and November 2012 in Clinton, North Carolina. The resultant seeds were sown and the seedlings were transplanted to 15 cm pots. Vegetative cuttings of the seedlings were taken for propagation in April 2013. The resultant plants were planted in the field in a two plant unreplicated plot in June 2013. 'NCORNSP-021SHJB' was selected on September 6, 2013, at the Horticultural Crops Research Station, in Clinton, North Carolina, for its plant growth habit, plant vigour, leaf shape, and leaf colour.

Tests & Trials: The comparative trial of 'NCORNSP-021SHJB' was conducted in a polyhouse during the spring of 2017 at BioFlora Inc., in St. Thomas, Ontario. The trial included a total of 20 plants each of the candidate and reference variety. All plants were grown from rooted cuttings and transplanted into 15 cm pots on April 18, 2017. The observations and measurements were taken from 10 plants or 10 parts of plants of each variety on June 8, 2017. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.


Comparison tables for 'NCORNSP-021SHJB' with reference variety 'Bright Ideas Cordate Black'

Leaf blade width (cm)

  'NCORNSP-021SHJB' 'Bright Ideas Cordate Black'
mean 6.4 4.8
std. deviation 0.32 0.48

Colour of petiole (RHS)

  'NCORNSP-021SHJB' 'Bright Ideas Cordate Black'
outer side N77A N186C

Colour of leaf blade (excluding anthocyanin colouration) (RHS)

  'NCORNSP-021SHJB' 'Bright Ideas Cordate Black'
upper side close to 202A greener than 200A

Click on image for larger view
NCORNSP-021SHJB
Sweet Potato: 'NCORNSP-021SHJB' (left) with reference variety 'Bright Ideas Cordate Black' (right)

Click on image for larger view
NCORNSP-021SHJB
Sweet Potato: 'NCORNSP-021SHJB' (left) with reference variety 'Bright Ideas Cordate Black' (right)

Click on image for larger view
NCORNSP-021SHJB
Sweet Potato: 'NCORNSP-021SHJB' (left) with reference variety 'Bright Ideas Cordate Black' (right)

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