Hydrangea Spike Cultivar Crinkled Sepals and Strong Stems
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Solution Overview
Problem
There is a lack of Hydrangea macrophylla cultivars with sterile flowers featuring crinkled sepals, which are a unique combination of characteristics in the 'Spike' cultivar, distinguishing it from other varieties like 'Blue Heaven'.
Innovation Solution
The 'Spike' cultivar, discovered as a natural branch mutation of Hydrangea 'Challenge', exhibits single sterile flowers in a blend of pink shades, crinkled and wavy sepals, strong stems, and is propagated through softwood stem cuttings, maintaining its characteristics in successive generations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If natural branch mutation is utilized to discover new cultivar characteristics, then unique ornamental features (crinkled sepals) are obtained, but breeding time and complexity increase
Solution Approach 1:
The patent applies preliminary action by maintaining a collection of Hydrangea macrophylla cultivars and observing them over time for spontaneous mutations. The inventor regularly inspected plants for unusual characteristics before formal breeding programs began, allowing early detection of the crinkled sepal mutation in the 'Spike' cultivar. This proactive monitoring approach enabled capture of the unique mutation while minimizing the time required to discover and propagate the new cultivar characteristics.
2Stability of the object's composition
If asexual propagation by softwood cuttings is used, then cultivar characteristics are maintained stable, but propagation complexity increases
Solution Approach 1:
The patent applies copying by using softwood stem cuttings to reproduce the 'Spike' cultivar. This vegetative propagation method creates genetic copies of the parent plant, ensuring that the unique crinkled sepal characteristic and other cultivar traits are faithfully reproduced in successive generations. The cutting process involves taking stem segments with nodes, placing them in suitable propagation media, and allowing root development, thereby creating true-to-type replicas without sexual recombination.
3Shape
If crinkled and wavy sepals are developed as a distinctive feature, then ornamental value increases, but genetic uniqueness requirements increase
Solution Approach 1:
The patent applies local quality by focusing the breeding objective on a specific local characteristic - the crinkled and wavy texture of the sepals - rather than attempting to modify the entire plant uniformly. The 'Spike' cultivar was selected and propagated specifically for this localized sepal feature, which appears on the sterile flowers but not necessarily on other plant parts. This approach allows the unique ornamental quality to be concentrated in the most visually important elements while maintaining overall plant health and adaptability.
Data Source
AI summary
A new cultivar of Hydrangea macrophylla named ‘Spike’ that is characterized by its single sterile flowers that are a blend of pink shades in color with crinkled and wavy sepals, its strong stems, and its free flowering habit with sturdy inflorescences.