Hydrangea Hortmasun Bi-Color Sepals Strong Rooting
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Solution Overview
Problem
Existing Hydrangea macrophylla cultivars lack bi-colored sterile flowers with strong rooting and sturdy texture, and there is a need for new cultivars with improved growth habits and flowering characteristics.
Innovation Solution
The development of the 'Hortmasun' cultivar, which results from a controlled breeding program, exhibits mophead type inflorescences with pink and white margin sterile flower sepals, sturdy texture, and a strong rooting habit, achieved through asexual propagation by stem cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing Hydrangea macrophylla cultivars are used, then the plant structure is simple and easy to maintain, but the flowers lack bi-coloration and strong rooting
Solution Approach 1:
The patent applies parameter changes by selectively breeding for specific phenotypic parameters including bi-coloration (pink with white margins), sturdy texture, and strong rooting habit. The controlled cross between reference plants 03-015-06 and 02-029-06 targeted these specific parameters to produce cultivar Hortmasun with improved rooting strength while maintaining manageable plant structure.
2Strength
If sterile flower sepals are made thicker and sturdier, then the texture improves, but the plant requires more resources for growth
Solution Approach 1:
The patent applies local quality by concentrating resources on developing thick, sturdy sterile flower sepals with bi-coloration, while maintaining overall plant health through controlled breeding. The sepal thickness and texture are locally enhanced without requiring excessive overall plant energy, as the breeding program selected for efficient resource allocation to these specific floral structures.
3Stability of the object's composition
If the plant exhibits strong rooting habit, then the growth stability improves, but the propagation difficulty increases
Solution Approach 1:
The patent applies copying through asexual propagation by stem cuttings, which allows the strong rooting habit and bi-colorated sepals to be copied true-to-type in successive generations. This propagation method preserves the stable growth habit and improved characteristics without requiring complex breeding processes, making the cultivar easy to multiply while maintaining its superior traits.
4Shape
If bi-colored sterile flowers with white margins are developed, then the aesthetic quality improves, but the breeding complexity increases
Solution Approach 1:
The patent applies segmentation by breaking down the complex bi-coloration trait into manageable components through controlled crossing. The sterile flower sepals are segmented into distinct color zones (pink base with white margins), allowing the breeding program to select for and combine specific color genes from the parent plants 03-015-06 and 02-029-06 to produce the desired bi-colorated cultivar.
Data Source
AI summary
A new cultivar of Hydrangea macrophylla plant named ‘Hortmasun’ that is characterized by its mophead type inflorescences with sterile flower sepals that are pink in color with white margins, its sterile flower sepals with a sturdy and thick texture and its strong rooting habit.