Heuchera Plant Breeding for Dark Leaf Color and Compact Habit
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Solution Overview
Problem
There is a need for new compact Heuchera plants with attractive leaf coloration and good garden performance, as existing varieties like 'Crimson Curls' and 'Black Beauty' lack the desired dark brown to almost black leaf color and compact, dense growth habit.
Innovation Solution
A Heuchera hybrid, 'IFHEBBR', was developed through cross-pollination of 'Crimson Curls' and a proprietary selection, exhibiting compact and uniformly mounded growth, dark brown to almost black leaves, long flowering period, and greyed red flowers, achieved through asexual reproduction by in vitro meristem culture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If existing Heuchera varieties like 'Crimson Curls' and 'Black Beauty' are used, then they have good garden performance and flowering characteristics, but they lack the desired dark brown to almost black leaf color and compact, dense growth habit
Solution Approach 1:
The patent applies parameter changes by selecting and breeding for specific phenotypic parameters including extreme leaf color darkness (dark brown to almost black) and compact plant architecture. The breeding process optimized multiple parameters simultaneously: leaf color intensity, plant height, spread, and density to achieve the desired dark-leaved compact Heuchera variety that distinguishes itself from parent varieties through superior color darkness and compactness
2Shape
If Heuchera plants are bred for compact size and dense foliage, then they achieve desirable ornamental characteristics, but they may have reduced flowering period or number of inflorescences
Solution Approach 1:
The patent resolves this contradiction through multi-parameter optimization in the breeding process. The selected plant 'IFHEBBR' achieves compact habit (20-30 cm height, 20-30 cm spread) while simultaneously maintaining an extended flowering period from late spring through summer and into fall. The breeding program optimized the relationship between plant size parameters and flowering duration parameters to achieve both compactness and prolonged ornamental interest through extended blooming
3Shape
If Heuchera plants are bred for dark leaf coloration, then they achieve attractive ornamental features, but they may have reduced tolerance to environmental variations and high temperatures
Solution Approach 1:
The patent resolves this contradiction through comprehensive selection for both color intensity and environmental adaptability. The breeding process selected for extreme leaf color darkness while simultaneously testing and selecting for tolerance to temperature extremes, humidity variations, and different soil conditions. The resulting variety 'IFHEBBR' maintains dark brown to almost black foliage while demonstrating hardiness across USDA zones 3-9, proving that intense pigmentation and environmental tolerance can be co-optimized through selective breeding
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The new Heuchera plant 'IFHEBBR' demonstrates stable and true-to-type characteristics, offering improved leaf color, compactness, and garden performance, distinguishing it from parent varieties and showing good tolerance to environmental variations and high temperatures, suitable for USDA Hardiness Zones 3 through 9.
Implementation Method 1
Asexual reproduction of the new Heuchera plant by in vitro meristem culture in a controlled environment in Andijk, The Netherlands since June, 2016 has shown that the unique features of this new Heuchera plant are stable and reproduced true to type in successive generations.
Data Source
AI summary
A new and distinct cultivar of Heuchera plant named ‘IFHEBBR’, characterized by its compact and uniformly mounded plant habit; densely foliated and bushy appearance; dark brown to almost black-colored leaves; long flowering period; numerous inflorescences with greyed red-colored flowers; and good garden performance.