Tomeina-blue Hydrangea Breeding for Stable Blue Double Inflorescences
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Solution Overview
Problem
Existing Hydrangea cultivars do not consistently produce double-type, blue-colored inflorescences under acidic soil conditions, and there is a need for a cultivar with distinct characteristics such as flower type, growth vigor, and inflorescence color.
Innovation Solution
The development of the 'Tomeina-blue' Hydrangea macrophylla cultivar, resulting from controlled cross-pollination between 'Morino-izumi' and a proprietary Hydrangea macrophylla breeding selection, which exhibits double-type, light purple-colored inflorescences that turn pale blue under acidic conditions, dark green foliage, and a moderately vigorous, upright growth habit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional Hydrangea cultivars are grown under acidic soil conditions, then they may produce blue-colored inflorescences, but they do not consistently produce double-type inflorescences
Solution Approach 1:
The patent applies parameter changes by selecting and breeding for specific genetic traits that control inflorescence type (single vs. double) and color response to soil pH. The cultivar 'Tomeina-blue' has been bred to consistently express double-type inflorescences with reliable color change in response to acidic soil conditions, changing the genetic parameters to achieve both consistency and desired characteristics.
2Reliability
If Hydrangea cultivars are bred for distinct characteristics, then they may achieve unique flower types and colors, but they may lose growth vigor
Solution Approach 1:
The patent applies local quality by selecting for specific local traits (double-type inflorescences, blue color under acidic conditions) while maintaining overall plant health and moderate vigor. The cultivar exhibits distinct characteristics in the inflorescence region while preserving adequate growth capability, achieving localized differentiation without complete loss of productivity.
3Reliability
If Hydrangea cultivars produce larger inflorescences, then they may be more visually striking, but they may have reduced compactness and habit
Solution Approach 1:
The patent applies dynamics by creating a balanced relationship between inflorescence size and plant habit. The cultivar 'Tomeina-blue' produces substantial double-type inflorescences while maintaining a compact, upright growth habit through controlled branching and stem development, achieving dynamic balance between flower display and overall plant form.
Data Source
AI summary
A new and distinct cultivar of Hydrangea plant named ‘Tomeina-blue’, characterized by its light purple-colored inflorescences that are pale blue-colored when grown under acidic soil conditions, dark green-colored foliage, and moderately vigorous, upright growth habit, is disclosed.