Hydrangea PEACE Double White Flower Breeding

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Solution Overview

Problem

There is a lack of Hydrangea macrophylla cultivars with unique double white flowers, free flowering and repeating blooming habit, and strong stems resistant to rain and wind damage, which are not found in existing cultivars like 'Hanabi' or 'Yamaajisai'.

Innovation Solution

The new cultivar 'PEACE' is developed through controlled breeding, exhibiting double sterile white flowers, mop-head type inflorescences, and strong stems, derived from a cross between Hydrangea macrophylla and 'Yamaajisai', with asexual reproduction by softwood stem cuttings, ensuring stability and true-to-type reproduction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional Hydrangea macrophylla cultivars like 'Hanabi' or 'Yamaajisai' are used, then they have established breeding and propagation methods, but they lack unique double white flowers, free flowering habit, and strong stems resistant to weather damage

Engineering Contradiction:

Improveflower color variety and blooming habitVSAvoidstem strength and weather resistance

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies parameter changes by selecting and breeding for specific floral characteristics including double flower formation, white coloration, and extended blooming period. The cultivar 'PEACE' exhibits these altered parameters compared to traditional cultivars, achieving unique double sterile white flowers with continuous blooming from April to October while maintaining strong stem structure

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The cultivar 'PEACE' achieves multi-functionality by combining multiple desirable traits in a single cultivar: double flower formation, white color, extended blooming period, and strong weather-resistant stems. This allows the plant to serve multiple ornamental functions simultaneously in landscape and cut flower applications

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Stability of the object's composition

If asexual reproduction by softwood stem cuttings is used, then true-to-type reproduction is achieved, but the breeding process requires controlled conditions and time

Engineering Contradiction:

Improvegenetic stability and true-to-type reproductionVSAvoidbreeding and propagation time

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

The patent applies preliminary action by establishing controlled breeding programs and selecting parent plants with desired characteristics before the actual breeding process. The controlled cross between unnamed Hydrangea macrophylla and 'Yamaajisai' was planned and executed in advance to produce the unique double white flower cultivar, ensuring genetic stability from the outset

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses asexual reproduction by softwood stem cuttings to create exact genetic copies of the selected cultivar. This copying method ensures true-to-type reproduction where each new plant is an identical clone of the parent, maintaining the unique double white flower characteristics and strong stem traits consistently across generations

Inventive Principle:

Principle #26Copying

Data Source

PatentUSPP22025P2Hydrangea plant named `PEACE`

Publication Date: 2011.07.12 IIE RYOJI

AI summary

A new cultivar of Hydrangea macrophylla named ‘PEACE’ that is characterized by its free-flowering and reblooming habit, its well-developed mop-head type inflorescences comprised of double sterile flowers that are white in color, and its strong stems that resist rain and wind damage.