Kakegawa AU20


Denomination: 'Kakegawa AU20'
Trade name: Crescendo Primrose
Botanical Name: Osteospermum
Applicant/Holder: Sakata Seed Corporation
2-7-1 Nakamachidai
Breeder: Akinobu Ui, Sakata Seed Corporation, Shizuoka, Japan
Shin Ishikawa, Sakata Seed Corporation, Kakegawa City, Japan
Agent in Canada: BioFlora Inc.
38723 Fingal Line
R.R. #1
St. Thomas, Ontario
N5P 3S5
Tel: 519-631-6241
Application Date: 2006-03-31
Application Number: 06-5407
Grant of Rights Date: 2008-05-29
Certificate Number: 3225
Date rights surrendered: 2014-05-23

Variety Description

Varieties used for comparison: 'Seikilrem' (Lemon Symphony) and 'Crescendo Yellow'

Summary: 'Kakegawa AU20' differs from the reference varieties, 'Seikilrem' and 'Crescendo Yellow', mainly in leaf length, leaf width, inflorescence diameter, ray floret length, ray floret width, ray floret colour and disc diameter. The leaves of 'Kakegawa AU20' are long to very long and very wide whereas they are short to medium in length and medium in width in 'Seikilrem' and medium in length and medium to wide in 'Crescendo Yellow'. The diameter of the inflorescence of 'Kakegawa AU20' is very wide whereas it is medium to wide in 'Seikilrem' and wide to very wide in 'Crescendo Yellow'. The ray florets of 'Kakegawa AU20' are very long and wide to very wide whereas they are medium to long and narrow to medium in width in 'Seikilrem' and long and medium in width in 'Crescendo Yellow'. The main colour of the upper side of the ray floret of 'Kakegawa AU20' is light yellow whereas it is yellow orange in both reference varieties. Before dehiscence, the disc diameter of 'Kakegawa AU20' is wider than that of 'Seikilrem'.


PLANT: erect to semi-erect shoots with medium to strong anthocyanin, tall

LEAF: long to very long, very wide, spatulate shape, shallow to medium depth of incisions of margins, no variegation, medium green on the upper side

FLOWER: long peduncle, one or two complete ray floret whorls, very wide inflorescence diameter
RAY FLORET: very long, wide to very wide, elliptic to oblanceolate in shape, with a rounded - dentate apex, reflexing present, no inward rolling of longitudinal margins, horizontal attitude, light yellow on the upper side, yellow with brown stripes on the lower side
DISC: grey-purple with yellow base before dehiscence

Origin & Breeding History: 'Kakegawa AU20' originated from the cross of the proprietary breeding line, 'G-769', as the female parent, with another proprietary breeding line, 'SL-4', as the male parent, conducted in 2000 in Kakegawa, Japan. The initial selection was made in 2000 based on flower colour and early flowering. Asexual propagation through the use of vegetative cuttings was first conducted in 2001.

Tests & Trials: The trials for 'Kakegawa AU20' were conducted in a polyhouse at BioFlora in St. Thomas, Ontario, during the spring of 2007. The trials included 15 plants of each variety grown from rooted cuttings and transplanted into 11 cm pots. Observations and measurements were taken from 10 plants of each variety. All colour characteristics were determined using the 2001 Royal Horticultural Society (RHS) colour chart.

Comparison tables for 'Kakegawa AU20' with reference varieties 'Seikilrem' and 'Crescendo Yellow'

Leaf length (cm)

  'Kakegawa AU20' 'Seikilrem' 'Crescendo Yellow'
mean 7.3 4.8 5.6
std. deviation 0.39 0.81 0.80

Leaf width (cm)

  'Kakegawa AU20' 'Seikilrem' 'Crescendo Yellow'
mean 3.7 1.7 2.2
std. deviation 0.41 0.26 0.31

Inflorescence diameter (cm)

  'Kakegawa AU20' 'Seikilrem' 'Crescendo Yellow'
mean 10.6 7.6 8.6
std. deviation 0.18 0.50 0.76

Ray floret length (cm)

  'Kakegawa AU20' 'Seikilrem' 'Crescendo Yellow'
mean 5.4 3.9 4.4
std. deviation 0.08 0.16 0.22

Ray floret width (cm)

  'Kakegawa AU20' 'Seikilrem' 'Crescendo Yellow'
mean 1.2 0.7 0.8
std. deviation 0.04 0.07 0.06

Main colour of ray floret (RHS)

  'Kakegawa AU20' 'Seikilrem' 'Crescendo Yellow'
upper side 8C-D (fades towards base) 13C 13B with tones of 13A

Disc diameter before dehiscence (cm)

  'Kakegawa AU20' 'Seikilrem' 'Crescendo Yellow'
mean 1.2 0.9 1.1
std. deviation 0.16 0.04 0.08

Click on image for larger view
Kakegawa AU20
Osteospermum: 'Kakegawa AU20' (left) with reference varieties 'Seikilrem' (centre) and 'Crescendo Yellow' (right)

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