Lobtrablu

Lobelia

Denomination: 'Lobtrablu'
Trade name: Arcade Trailing Blue with Eye
Botanical Name: Lobelia erinus
Applicant/Holder: Syngenta Seeds B.V.
P.O. Box 2
1600 AA
Enkhuizen
Netherlands
Breeder: Theodorus C. M. van Kleinwee, Syngenta Seeds B.V., Enkhuizen, Netherlands
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Canada
Tel: 519-631-6241
Application Date: 2005-11-07
Application Number: 06-5637
Date Withdrawn: 2008-07-30

Variety Description

Varieties used for comparison: 'Big Blue' and 'Lobeto' (Laguna Trailing Dark Blue)

Summary: 'Lobtrablu' has a shorter plant height and narrower plant width than 'Big Blue'. The foliage of 'Lobtrablu' is sparse in comparison to 'Big Blue' which has medium foliage density. 'Lobtrablu' has thinner stems than the reference varieties. 'Lobtrablu' has lighter green leaf coloration than both reference varieties. 'Lobtrablu' has a dark blue stigma while 'Lobeto' has a purple stigma.

Description:

PLANT: vegetatively propagated annual, spreading/trailing growth habit, sparse to medium branching, sparse foliage

STEM: thin, medium to dark green, weak anthocyanin colouration, no pubescence

LEAF: alternate arrangement, simple type, spatulate shape, apex obtuse with very small tip, attenuate base, sparsely serrate margin, light to medium green with no variegation, very sparse and short pubescence

SEPAL: triangular, very weak anthocyanin colouration on tips only

INFLORESCENCE: raceme type, terminal and axillary position, upright attitude
PEDICEL: absent or very weak anthocyanin colouration
UPPER COROLLA LOBE: acute and cuspidate apex, elliptic, violet blue
LOWER COROLLA LOBE: elliptic and obovate shape, violet blue on upper and lower sides, small white with dark blue blotched markings, very small yellow palate
STIGMA: dark blue

Origin & Breeding History: 'Lobtrablu' originated from a controlled cross made in 2000, in Enkhuizen, The Netherlands, between the female parent Z0892 and the male parent 'Big Blue'. The new variety 'Lobtrablu' was selected from the resultant progeny as a single plant in April 2001. It was tested as a clone one year later for greenhouse and field performance, branching and plant habit, flower colour and size and continuity criteria. The first asexual reproduction by cuttings was conducted in April 2001.

Tests & Trials: Tests and trials were conducted in a polyhouse during the summer of 2007 in St. Thomas, Ontario. The trial included a total of 15 plants of each variety. All plants were grown from rooted cuttings and transplanted into 11cm pots on April 23, 2007. Observations and measurements were taken from 10 plants of each variety on June 20, 2007. All colour measurements were made using the 2001 Royal Horticultural Society (RHS) Colour Chart.


Comparison tables for 'Lobtrablu' with reference varieties 'Big Blue' and 'Lobeto'

Plant height (cm)

  'Lobtrablu' 'Big Blue' 'Lobeto'
mean 10.7 22.2 N/A
std. deviation 1.76 4.14 N/A

Plant width (cm)

  'Lobtrablu' 'Big Blue' 'Lobeto'
mean 55.5 78.8 70.3
std. deviation 6.69 4.10 5.25

Corolla colour (RHS)

  'Lobtrablu' 'Big Blue' 'Lobeto'
upper lobe- upper side 94A 96A 96B with 96A at apex
lower lobe-upper side 95C 96B with darker apex 96A 96B with faded areas of 96D
lower lobe- lower side 96D (darker than) at apex 95C 97C with streaks of 96B

Click on image for larger view
Lobtrablu
Lobelia: 'Lobtrablu' (left) with reference varieties 'Big Blue' (center) and 'Lobeto' (right)

Click on image for larger view
Lobtrablu
Lobelia: 'Lobtrablu' (left) with reference varieties 'Big Blue' (center) and 'Lobeto' (right)

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