Hydrangea Harbits Bi-Colored Lacecap Inflorescence Breeding
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Solution Overview
Problem
Existing Hydrangea cultivars lack a combination of attractive foliage and flower coloration, with limited variation in inflorescence form and susceptibility to environmental and cultural variations.
Innovation Solution
The development of Hydrangea macrophylla 'Harbits' through planned breeding, characterized by an upright and mounded habit, strong roots and stems, dark green leaves, and bi-colored white and red-purple lacecap-type inflorescences, which are stable and reproduce true to type via softwood cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing Hydrangea cultivars are used, then they have established growth patterns, but they lack a combination of attractive foliage and flower coloration with limited variation in inflorescence form
Solution Approach 1:
The patent combines multiple desirable traits from different parent plants into a single cultivar. The 'Harlequin' parent contributed disease resistance and foliage quality, while the unknown pollen parent contributed the lacecap inflorescence form and bi-colored flowers. This merging of traits from different sources creates a new cultivar that exhibits all desired characteristics simultaneously - attractive dark green foliage, disease resistance, and the rare combination of lacecap form with bi-colored flowers.
Solution Approach 2:
The new cultivar exhibits different qualities in different parts of the plant. The foliage maintains the dark green, disease-resistant characteristics inherited from the 'Harlequin' parent, while the inflorescences display the lacecap form and bi-colored flowers from the other parent. This local differentiation of traits allows the plant to optimize each component for its specific function and aesthetic contribution.
2Reliability
If existing Hydrangea cultivars are used, then they have established characteristics, but they show susceptibility to environmental and cultural variations
Solution Approach 1:
The patent converts the potential harm of environmental variability into a benefit by selecting for plants that not only tolerate but thrive under varying conditions. The open-pollination process exposed the progeny to natural environmental variations, and the selection process identified individuals that maintained stable, desirable characteristics despite these variations. This resulted in a cultivar that is both reliable in its trait expression and adaptable to different growing conditions.
Solution Approach 2:
The new cultivar demonstrates the ability to maintain stable genetic parameters (dark green foliage, disease resistance) while adapting to changes in environmental parameters (temperature, light intensity, cultural practices). The phenotype may vary somewhat with environmental conditions, but the genotype remains stable, ensuring true-to-type reproduction through asexual propagation.
3Adaptability or versatility
If open-pollination breeding is used, then genetic diversity is increased, but the stability and true-to-type reproduction of new traits must be verified
Solution Approach 1:
The patent performs preliminary verification of trait stability through asexual reproduction before releasing the cultivar. Softwood cuttings were taken and propagated to produce multiple clones of the selected plant. These clones were then evaluated to confirm they all exhibited the same desirable characteristics - lacecap inflorescences with bi-colored flowers and dark green foliage. This preliminary propagation and evaluation step ensures that the genetic diversity captured through open-pollination has been stabilized into a reliable, true-to-type cultivar.
Data Source
AI summary
A new and distinct cultivar of Hydrangea plant named ‘Harbits’ characterized by its upright and mounded plant habit; strong roots and stems; strong and dark green-colored leaves; and large lacecap-type inflorescences with white and red purple bi-colored flowers.