Heucherella Mojito Leaf Color Mutation
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Solution Overview
Problem
There is a need for a new cultivar of ×Heucherella that offers distinct leaf coloration, habit, and flower characteristics, differing from existing varieties like 'Buttered Rum' and 'Golden Zebra', with improved vigor and propagation stability through asexual methods.
Innovation Solution
The development of ×Heucherella 'Mojito', characterized by yellow to lime leaf color with a strong red pattern, denser habit, and medium plant size, achieved through a whole plant mutation of ×Heucherella 'Buttered Rum', and propagated via division and tissue culture, ensuring consistent progeny characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If ×Heucherella 'Buttered Rum' is used as the parent variety, then the plant exhibits orange amber to red brown leaf coloration, but the new cultivar requires yellow to lime basic leaf color with red pattern
Solution Approach 1:
The patent describes a whole plant mutation that fundamentally changed the leaf color parameters from orange amber to red brown (parent variety) to yellow to lime with red pattern (new cultivar). This parameter change approach resolved the contradiction by creating a new genetic variant with the desired coloration while maintaining species characteristics.
2Quantity of substance
If ×Heucherella 'Golden Zebra' is used as a reference variety, then the plant has a less dense habit with fewer crowns, but the new cultivar requires a denser habit with multiple crowns
Solution Approach 1:
The mutation resulted in changed growth parameters including increased crown multiplication and denser habit. The plant now produces multiple crowns compared to the single or fewer crowns of reference varieties, resolving the contradiction between quantity of crowns and habit density through natural mutational variation.
3Length of moving object
If ×Heucherella 'Golden Zebra' is used as a reference variety, then the plant has longer flower spikes, but the new cultivar requires shorter flower spikes
Solution Approach 1:
The mutation caused a reduction in flower spike length parameter. The new cultivar produces shorter flower spikes compared to the reference variety, while maintaining stable flowering characteristics through asexual propagation, thus resolving the contradiction between spike length and flowering stability.
4Reliability
If asexual propagation methods are used, then consistent progeny characteristics are achieved, but environmental variations may still affect the phenotype
Solution Approach 1:
The patent employs asexual propagation methods (division and tissue culture) to create genetic copies of the mutant plant. This copying approach ensures that the unique leaf coloration and growth characteristics are faithfully reproduced in progeny, maintaining reliability while allowing phenotypic expression to respond to environmental conditions.
Data Source
AI summary
A new and distinct ×Heucherella plant substantially as shown and described, characterized by spring leaves of yellow with a strong red pattern in the center of the leaves, along the veins, summer through winter leaves yellow green with the strong red center, palmately lobed leaves, small white flowers on short flower stalks, medium plant size with multiple crowns, and excellent vigor.