Kyuikukan 2
| Denomination: | 'Kyuikukan 2' |
|---|---|
| Trade name: | Desana Maple |
| Botanical Name: | Ipomoea batatas |
| Applicant/Holder: |
National Agriculture and Food Research Organization 3-1-1, Kannondai, Tsukuba-shi Ibaraki 305-8517 Japan Suntory Flowers Limited Administrative Division 4-17-5 Shiba, Minato-ku Tokyo 108-0014 Japan Tel: +81-3-5419-1382 |
| Breeder: |
Yasuhiro Takahata, Suntory Flowers Limited, Miyazaki, Japan Masaru Yoshinaga, Suntory Flowers Limited, Miyazaki, Japan Hiroki Nakayama, Suntory Flowers Limited, Miyazaki, Japan Masaru Tanaka, Suntory Flowers Limited, Miyazaki, Japan Yoshinori Nakazawa, Suntory Flowers Limited, Kumamoto, Japan Toru Kumagai, Suntory Flowers Limited, Ibaraki, Japan Yumi Kai, Suntory Flowers Limited, Miyazaki, Japan Kenji Katayama, Suntory Flowers Limited, Miyazaki, Japan Tetsufumi Sakai, Suntory Flowers Limited, Miyazaki, Japan Kazunari Iwaki, Suntory Flowers Limited, Shiga, Japan Yasuyuki Murakami, Suntory Flowers Limited, Shiga, Japan |
| Agent in Canada: |
BioFlora Inc. 38723 Fingal Line R.R. #1 St. Thomas, Ontario N5P 3S5 Canada Tel: 519-317-7511 |
| Application Date: | 2007-03-30 |
| Application Number: | 07-5828 |
| Grant of Rights Date: | 2010-09-23 |
| Certificate Number: | 3952 |
| Date rights surrendered: | 2024-09-23 |
Variety Description
Variety used for comparison: 'Sweet Caroline Purple'
Summary: The stems and lower side of the leaf blades of 'Kyuikukan 2' have denser pubescence than those of 'Sweet Caroline Purple'. 'Kyuikukan 2' has larger leaves with broader terminal lobes than 'Sweet Caroline Purple'.
Description:
PLANT: vegetatively propagated, annual, upright-bushy growth habit, moderate degree of branching
STEM: purple, very strong anthocyanin colouration, moderate pubescence, medium thickness, smooth
LEAF: alternate arrangement along stem, simple
LEAF BLADE: palmate shape, acuminate apex, cordate-like base, lobed, medium to deep incisions between lobes, moderate pubescence on upper side, sparse pubescence on lower side, no variegation, upper side is dark green (RHS 144A) with purple tones changing to greyed purple black (RHS N186A) with green tones at maturity, lower side is brown green (RHS 146B) changing to dark violet (greyer than N79A) at maturity
MIDRIB: upper side is dark violet (RHS N79A), lower side is dark violet (RHS N79B)
PETIOLE: upper side has strong brown purple (RHS N77A) anthocyanin colouration, lower side has strong dark violet (N79B) anthocyanin colouration
Origin & Breeding History: 'Kyuikukan 2' originated from a cross between the female parent designated '99US-OR' and the male parent made up of a mix of pollen from proprietary selections of Ipomoea batatas identified as 'KOP99205-1', 'KOP99210-1', 'Kyuikukan 1 gou', 'KOP99211-3', 'KOP99211-4' and 'KOP97286-5'. The cross was conducted in June 2001 at the Miyakonojo Upland Farming Research Station National Agricultural Reseach Center for Kyushu Okinawa Region in Miyakonojo-shi, Miyazaki, Japan. The resultant seedlings were grown in pots in a glasshouse and evaluated. One seedling was selected based on its leaf colour and growth habit, propagated by cutting and planted in pots to be trialed in Miyakonojo-shi in Miyazaki, Japan and at the Omi R&D Center of Suntory Flowers Ltd. located in Higashiomi-shi, Shiga-ken, Japan during 2002. The botanical characteristics of this seedling were examined and compared to similar varieties 'Sweet Caroline Purple' and 'Sweet Caroline Bronze'. It was concluded that this Ipomoea plant named 'Kyuikukan 2' is distinguishable from any other varieties, and uniform and stable in its characteristics.
Tests & Trials: The trial of 'Kyuikukan 2' was conducted in a polyhouse during the summer of 2009 at BioFlora Inc. in St. Thomas, Ontario. It included 15 plants of each variety. All plants were grown from rooted cuttings transplanted into 15 cm pots on June 30, 2009. Most observations and measurements were taken from 10 plants or parts of plants of each variety on August 6, 2009. All colour determinations were made using the 2007 Royal Horticultural Society (RHS) Colour Chart.
Comparison tables for 'Kyuikukan 2' with reference variety 'Sweet Caroline Purple'
Leaf blade length (cm)
| 'Kyuikukan 2' | 'Sweet Caroline Purple' | |
|---|---|---|
| mean | 18.3 | 15.2 |
| std. deviation | 1.02 | 1.21 |
Leaf blade width (cm)
| 'Kyuikukan 2' | 'Sweet Caroline Purple' | |
|---|---|---|
| mean | 19.3 | 14.2 |
| std. deviation | 1.08 | 1.76 |
Width of terminal lobe of leaf blade (cm)
| 'Kyuikukan 2' | 'Sweet Caroline Purple' | |
|---|---|---|
| mean | 6.0 | 4.3 |
| std. deviation | 0.44 | 0.44 |
Click on image for larger view
Sweet Potato: 'Kyuikukan 2' (left) with reference variety 'Sweet Caroline Purple' (right)
Click on image for larger view
Sweet Potato: 'Kyuikukan 2' (left) with reference variety 'Sweet Caroline Purple' (right)
Click on image for larger view
Sweet Potato: 'Kyuikukan 2' (left) with reference variety 'Sweet Caroline Purple' (right)
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