Heuchera 'Coco' Cultivar Development via Controlled Crossing
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Solution Overview
Problem
Existing Heuchera cultivars lack distinct characteristics such as deep leaf color, flowering habits, and vigor, and there is a need for a cultivar with unique features like dark brown to black leaves, light pink to white flowers, and repeat blooming on short stems.
Innovation Solution
A new Heuchera cultivar 'Coco' is developed through controlled crossing, characterized by medium-small glossy dark brown to black leaves, light pink to white flowers, repeat blooming on short stems, small multi-crowned habit, and excellent vigor, achieved through asexual propagation techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional Heuchera cultivars are used, then available color variations are limited, but achieving deep dark brown to black leaf color with glossy texture and distinct flower patterns requires specific controlled crossing
Solution Approach 1:
The patent applies parameter changes by selectively crossing Heuchera K409-2 (seed parent) and Heuchera K367-2 (pollen parent) to achieve specific phenotypic parameters - dark brown to black leaf color, glossy texture, light pink to white flowers, and short flower stalks. The controlled cross resolves the contradiction by systematically combining parental traits to produce a cultivar with distinct characteristics that were not available in traditional cultivars.
2Reliability
If asexual propagation is used, then cultivar characteristics are maintained consistently, but propagation time and labor requirements increase
Solution Approach 1:
The patent employs asexual propagation methods (cuttings and tissue culture) to create copies of the Heuchera 'Coco' cultivar that maintain identical genetic characteristics and phenotypic traits. This copying approach ensures trait consistency across all propagules while the tissue culture method specifically addresses the time loss issue by enabling rapid, standardized propagation compared to traditional seed propagation or manual cuttings.
3Illumination intensity
If leaf color is deepened to dark brown to black, then visual distinction from other cultivars is improved, but leaf glossiness and lobe rounding become more difficult to achieve simultaneously
Solution Approach 1:
The patent applies local quality by achieving different surface characteristics in different regions of the leaf - deep dark brown to black coloration combined with glossy texture and rounded lobes. The controlled crossing of specific parents (K409-2 and K367-2) allows simultaneous expression of these local qualities through genetic combination, resolving the contradiction between color depth and surface texture achievement.
4Duration of action of stationary object
If flower stalks are shortened, then repeat blooming capability is enhanced, but flower production per season may be reduced
Solution Approach 1:
The patent applies continuity of useful action by creating a cultivar with short flower stalks that enables repeat blooming throughout the growing season. The controlled cross between K409-2 and K367-2 produces plants that can bloom multiple times (first flush in spring, second flush in summer), extending the useful action period. This continuous blooming capability resolves the contradiction by prioritizing prolonged flowering duration over single-season flower volume.
Data Source
AI summary
A new and distinct Heuchera plant characterized by medium small glossy dark brown to black leaves, light pink buds to white flowers, repeat blooming on short, dark flower stalks, small, multi-crowned, low mounding habit, and excellent vigor.