Sweet Potato

Denomination: 'Iposgbro'
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: 10-6957
Grant of Rights Date: 2012-02-15
Certificate Number: 4265
Date rights revoked: 2016-02-15

Variety Description

Variety used for comparison: 'Sweet Caroline Bronze'

Summary: The plants of 'Iposgbro' have a compact bushy-rounded growth habit while the plants of 'Sweet Caroline Bronze' have a mounded-spreading growth habit. The plants of 'Iposgbro' are narrower than the plants of 'Sweet Caroline Bronze'. The leaf blade of 'Iposgbro' has mainly three lobes while the leaf blade of 'Sweet Caroline Bronze' has mainly five lobes. The upper side of the leaf blade is dark brown and brown for 'Iposgbro' while the leaf blade of 'Sweet Caroline Bronze' is dark brown and brown purple.


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

LEAF: alternate arrangement, simple, ovate to palmate shape, acute apex, acute base, lobed margin, absent or very sparse pubescence on upper and lower side, absent or very weak glaucosity on upper side, dark brown (RHS 200C) and brown (RHS 200D) on upper surface, brown purple (RHS 184B-C) on lower surface, no variegation
PETIOLE: strong to very strong anthocyanin colouration.

Origin & Breeding History: The variety 'Iposgbro' originated from a cross made in Lompoc, California, USA in 2006. The cross was between the varieties 'Sweet Caroline Sweetheart Light Green' and 'Sweet Caroline Purple'. 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 'Iposgbro' 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 improve the light green and red colouration in the palmate leaf forms. Plant habit and branching ability were also used as selection criteria.

Tests & Trials: Trials for 'Iposgbro' 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 'Iposgbro' with reference variety 'Sweet Caroline Bronze'

Plant width (cm)

  'Iposgbro' 'Sweet Caroline Bronze'
mean 19.43 34.71
std. deviation 1.99 3.15

Colour of leaf blade (RHS)

  'Iposgbro' 'Sweet Caroline Bronze'
upper side 200C and 200D 200B and N199B-178B

Click on image for larger view
Sweet Potato: 'Iposgbro' (left) with reference variety 'Sweet Caroline Bronze' (right)

Click on image for larger view
Sweet Potato: 'Iposgbro' (left) with reference variety 'Sweet Caroline Bronze' (right)

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