Hydrangea Keiko Cultivar Picotee Florets Compact Growth
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Solution Overview
Problem
There is a need for Hydrangea cultivars with double-type florets and a compact-upright growth habit, specifically with a picotee flower color pattern, which is not adequately met by existing cultivars like 'Posy-Bouquet Noble II', as they lack the desired picotee pattern and have a less compact growth habit and lighter foliage color.
Innovation Solution
The development of a new Hydrangea macrophylla cultivar 'Keiko' through controlled breeding, combining the traits of proprietary selections KD10 and K15, resulting in double-type, light pink florets with a darker pink picotee pattern, dark green foliage, and a moderately vigorous, compact-upright growth habit, achieved through asexual reproduction by softwood cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If existing cultivars like 'Posy-Bouquet Noble II' are used, then they have a lacecap flower structure, but they lack the picotee color pattern and have a less compact growth habit
Solution Approach 1:
The patent combines multiple desirable traits from different parent plants through controlled cross-pollination. The female parent (KD10) contributes the compact-upright growth habit and double-type florets, while the male parent (K15) contributes the picotee color pattern. This merging of genetic material from two proprietary selections creates a new cultivar that exhibits all three desired characteristics simultaneously: double-type florets, picotee color pattern, and compact-upright growth habit.
2Ease of manufacture
If existing cultivars are used, then they have pink-colored flowers, but they lack the distinct picotee color pattern with darker pink edges
Solution Approach 1:
The picotee color pattern exhibits local quality by having different color intensities in different parts of the same flower structure. The sterile florets have light pink centers (RHS 69C) with darker pink picotee margins (RHS 68B), creating a two-toned effect within each individual floret. This local variation in color intensity is a defining characteristic that distinguishes the new cultivar from parents with uniform pink coloring.
3Ease of manufacture
If existing cultivars are used, then they have medium green foliage, but they lack the dark green-colored foliage
Solution Approach 1:
The dark green foliage color is copied from the female parent (KD10), which possesses this trait. The new cultivar faithfully reproduces the dark green foliage characteristic through asexual propagation by softwood cuttings, demonstrating genetic stability. The foliage color is consistently dark green (RHS 137A-137B) across multiple generations, matching the parent plant's composition.
Data Source
AI summary
A new and distinct cultivar of Hydrangea plant named ‘Keiko’, characterized by its double-type, modified lacecap inflorescences, having light pink-colored sterile florets with a darker pink picotee color pattern, dark green-colored foliage, and moderately vigorous, compact-upright growth habit, is disclosed.