Sweet Potato

Denomination: 'Iposghpur'
Botanical Name: Ipomoea batatas
Applicant/Holder: Floranova Service Corp.
22 North A Street
Lompoc, California
United States of America
Breeder: Paul Talmadge, Floranova Service Corp., Lompoc, United States of America
Agent in Canada: Variety Rights Management
475 County Road 18
R.R. #2
Oxford Station, Ontario
K0G 1T0
Tel: 613-258-9015
Application Date: 2010-05-03
Application Number: 10-6955
Grant of Rights Date: 2012-02-15
Certificate Number: 4268
Date rights revoked: 2016-02-15

Variety Description

Variety used for comparison: 'Sweet Caroline Sweetheart Purple'

Summary: The plants of 'Iposghpur' have a bushy-rounded growth habit while the plants of 'Sweet Caroline Sweetheart Purple' have a mounded-spreading growth habit. The plants of 'Iposghpur' are narrower than the plants of 'Sweet Caroline Sweetheart Purple'. The leaf blade and petiole of 'Iposghpur' are shorter than the leaf blade and petiole of 'Sweet Caroline Sweetheart Purple'.


PLANT: bushy-rounded growth habit, medium degree of branching
STEM: purple, very strong anthocyanin colouration, absent or very weak glaucosity, absent or very sparse pubescence, medium thickness, smooth shape

LEAF: alternate arrangement, simple, cordate shape, acute to acuminate apex, cordate base, entire margin, absent or very sparse pubescence on upper and lower side, absent or very weak glaucosity on upper side, black (RHS N186A-B) on upper surface, brown purple (RHS 187A) on lower surface, no variegation
PETIOLE: very strong anthocyanin colouration.

Origin & Breeding History: The variety 'Iposghpur' originated from a cross made in Lompoc, California, USA in 2006. The cross was between the varieties 'Sweet Caroline Purple' and 'Sweet Caroline Sweetheart Light Green'. The F1 population was viewed in the spring of 2007 and mass pollinated in the fall of 2007 to produce the F2 population. The variety 'Iposghpur' was selected from this population in April 2008 and underwent further vegetative trials throughout the summer of 2008. The initial selection criteria and objectives of the breeding program were to transfer the plant habit of the male parent to other leaf colours and shapes. Plant habit and branching ability were also used as selection criteria.

Tests & Trials: Trials for 'Iposghpur' were conducted during the summer of 2010 in Oxford Station, Ontario. Twenty plants of each variety were grown in 15 cm pots in a polyhouse. Plants were spaced approximately 40 cm apart. Observations and measurements were taken on 10 plants of each variety. Colours were determined using the 2001 Royal Horticultural Society (RHS) Colour Chart.

Comparison tables for 'Iposghpur' with reference variety 'Sweet Caroline Sweetheart Purple'

Plant width (cm)

  'Iposghpur' 'Sweet Caroline Sweetheart Purple'
mean 28.33 41.17
std. deviation 1.97 3.50

Leaf blade length (cm)

  'Iposghpur' 'Sweet Caroline Sweetheart Purple'
mean 7.00 9.13
std. deviation 0.65 0.44

Petiole length (cm)

  'Iposghpur' 'Sweet Caroline Sweetheart Purple'
mean 4.13 8.86
std. deviation 0.44 0.75

Colour of leaf blade (RHS)

  'Iposghpur' 'Sweet Caroline Sweetheart Purple'
upper surface N186A-B N200A-200A

Click on image for larger view
Sweet Potato: 'Iposghpur' (left) with reference variety 'Sweet Caroline Sweetheart Purple' (right)

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