Heuchera TNHEUNER Cultivar Sun Tolerance and Crown Vigor
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Solution Overview
Problem
Existing Heuchera cultivars lack a combination of dark red to burgundy colored leaves, medium-sized, slightly lobed foliage, yellow green flowers, good sun tolerance, and a medium to large mounding habit with excellent crown count and vigor, which are not adequately met by current varieties like Heuchera 'K797-3', 'K994-1', 'Cherry Cola', and 'Root Beer'.
Innovation Solution
A new Heuchera cultivar 'TNHEUNER' is developed through controlled crossing of Heuchera 'K797-3' and 'K994-1', exhibiting dark red to burgundy leaves, yellow green flowers, and a larger habit, propagated asexually to ensure consistent characteristics, with improved sun tolerance and vigor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If asexual propagation is used to maintain consistent characteristics, then genetic uniformity is improved, but propagation time and complexity increase
Solution Approach 1:
The patent performs preliminary selection and characterization of parent plants before crossing, and establishes asexual propagation protocols in advance. This allows the new cultivar to be rapidly propagated once developed, reducing the time loss associated with maintaining genetic uniformity across multiple generations.
2Adaptability or versatility
If controlled crossing of parent plants is performed to develop new traits, then genetic diversity is improved, but breeding complexity and time increase
Solution Approach 1:
The patent applies local quality by selecting parent plants with specific localized traits (Heuchera 'K797-3' for foliage color, Heuchera 'K994-1' for habit and flower color) and crossing them to concentrate desired properties in specific regions of the genome, thereby achieving genetic diversity without excessive breeding complexity.
3Volume of moving object
If larger habit and leaf size are achieved, then landscape suitability is improved, but plant density per area decreases
Solution Approach 1:
The patent changes key parameters of the Heuchera plant including habit size (from compact to medium-large mounding), leaf size (increased dimensions), and foliage color intensity (dark red to burgundy). These parameter changes create a cultivar optimized for landscape use where individual plant impact is prioritized over maximum planting density.
Data Source
AI summary
A new and distinct Heuchera plant characterized by dark red to burgundy colored leaves, medium size, slightly lobed, geranium-like leaves, yellow green flowers in short spikes in spring, good sun tolerance, a medium large, mounding habit with excellent crown count, and excellent vigor.