Hydrangea JPD01 Cultivar Traits and Breeding
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Solution Overview
Problem
There is a need for a new cultivar of Hydrangea macrophylla x Hydrangea serrata that exhibits dark leaves, attractive fall foliage, and flower colors, while being free flowering and hardy, as existing cultivars either lack these specific traits or are not stable across generations through asexual propagation.
Innovation Solution
The cultivar 'JPD01' is developed through controlled breeding, combining Hydrangea 'Julisa' and Hydrangea 'MAK20', resulting in dark-colored leaves that change with soil pH, pink-red lacecap inflorescences, compact and well-branched growth, and excellent cold hardiness, achieved through asexual propagation by stem cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing Hydrangea cultivars are used, then some may have dark leaves or attractive flowers, but they lack the combination of dark leaves, attractive fall foliage, free flowering, and hardiness simultaneously
Solution Approach 1:
The patent combines multiple desirable traits from different parent cultivars through controlled hybridization. The cross between 'Julisa' (providing dark foliage and fall color) and 'MAK20' (providing hardiness and flowering characteristics) merges these traits into a single cultivar that exhibits all four desired characteristics simultaneously, resolving the contradiction between trait combination and stability.
Solution Approach 2:
The cultivar exhibits free flowering without requiring specific environmental triggers or intensive care, and maintains hardiness that allows it to survive and thrive in various conditions independently. This self-sufficient nature ensures reliable expression of traits across generations with minimal human intervention.
2Shape
If a cultivar is selected for specific aesthetic traits like dark leaves and flower color, then it may lack hardiness or stable inheritance of these traits
Solution Approach 1:
The hybridization process merges the aesthetic traits of dark leaves and pink-red flowers from one parent with the hardiness traits from the other parent, creating a balanced cultivar that possesses both visual appeal and environmental resilience, along with stable inheritance of all traits.
3Duration of action of moving object
If a cultivar blooms on terminal buds only, then it may have extended flowering period, but it becomes vulnerable to spring frost damage
Solution Approach 1:
The flowering function is segmented across multiple bud types (terminal, lateral, and basal buds) rather than relying on a single bud type. This segmentation allows the plant to flower from multiple locations simultaneously, extending the overall flowering period while the basal and lateral buds provide backup flowering capacity that is less susceptible to spring frost damage.
Data Source
AI summary
A new cultivar of Hydrangea hybrid plant named ‘JPD01’ that is characterized by its leaves that are dark in color and fade to dark red in autumn, becoming more black in color in acidic soil and more red in color in neutral soil, its blooms on terminal, lateral and basal buds with a period of flowering that begins in mid-June, its lacecap inflorescences that are pink-red in color turning dark red in color in autumn until frost, its dried flowers that stay dark red in color in a vase for more than a year, its compact plant habit that is well-branched with rigid stems, and its good cold hardiness and is not affected by the frost in spring as it blooms on basal and lateral buds.