Hydrangea Cultivar SCHROLL121-12-01 Compact Habit and Flowering

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Solution Overview

Problem

Current Hydrangea macrophylla cultivars lack compact, upright growth habits with early flowering and attractive leaf and flower coloration, as well as consistent performance across varying environmental conditions.

Innovation Solution

The development of the new Hydrangea macrophylla cultivar 'SCHROLL121-12-01' through controlled breeding, which exhibits a compact, upright growth habit, freely branching with strong stems, and unique flower coloration that changes from bright green to white, along with a longer flowering period and improved post-production quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If conventional Hydrangea macrophylla cultivars are used, then they exhibit typical growth habits, but they lack compact, upright growth habits with early flowering and attractive leaf and flower coloration

Engineering Contradiction:

Improveplant habitVSAvoidflowering speed

Core Design Contradiction:

ShapeVSProductivity

Solution Approach 1:

The patent applies parameter changes by selecting and breeding for specific genetic traits that modify plant architecture parameters (compactness, upright habit, branching pattern) and physiological parameters (flowering time, flower color, leaf color). The new cultivar 'SCHROLL121-12-01' exhibits these altered parameters resulting from controlled cross-pollination and selective breeding, achieving both compact shape and early flowering simultaneously

Inventive Principle:

Principle #35Parameter changes

2Volume of moving object

If Hydrangea cultivars are bred for compact growth habit, then plant size is reduced, but flowering period and postproduction quality may be compromised

Engineering Contradiction:

Improveplant sizeVSAvoidflowering period

Core Design Contradiction:

Volume of moving objectVSDuration of action of moving object

Solution Approach 1:

The breeding program systematically changed multiple parameters simultaneously: reduced plant volume through compact growth habit selection, while extending flowering duration through selection of early-flowering genotypes. The resulting cultivar maintains a compact form (20 cm height, 35 cm diameter) while achieving a prolonged flowering period from June through summer, demonstrating that parameter changes can achieve multiple improvements together

Inventive Principle:

Principle #35Parameter changes

3Productivity

If Hydrangea cultivars are selected for early flowering, then flowering speed increases, but plant vigor and stem strength may be reduced

Engineering Contradiction:

Improveflowering speedVSAvoidstem strength

Core Design Contradiction:

ProductivityVSStrength

Solution Approach 1:

The patent resolves this contradiction by selecting for a combination of genetic traits that simultaneously enhance flowering speed and stem strength. The new cultivar forces faster than both parent selections while developing strong, freely branching stems with strong lateral branches. This is achieved through controlled cross-pollination combining desirable traits from both parents and selective breeding for early flowering response

Inventive Principle:

Principle #35Parameter changes

4Stability of the object's composition

If conventional breeding methods are used, then existing cultivar traits are maintained, but new unique coloration and growth habits are not achieved

Engineering Contradiction:

Improvetrait consistencyVSAvoidphenotypic variation

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The patent applies preliminary action through controlled cross-pollination designed to combine specific traits from selected parent plants before environmental exposure. The breeding program pre-combines desirable genetic traits for compact growth, early flowering, and unique coloration (bright green sterile flowers turning white, light green leaves) through controlled mating, then selects progeny exhibiting these predetermined traits. This preliminary genetic combination enables the new cultivar to express unique phenotypes that maintain stability across asexual reproduction

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUSPP29852P2<i>Hydrangea </i>plant named ‘SCHROLL121-12-01’

Publication Date: 2018.11.20 SCHROLL MANAGEMENT APS

AI summary

A new and distinct cultivar of Hydrangea plant named ‘SCHROLL121-12-01’, characterized by its compact, upright and mounded plant habit; moderately vigorous growth habit; freely branching habit and strong stems; large mophead-type inflorescences with initially bright green-colored sterile flowers which become bright green and white in color with development; long flowering period; and good postproduction quality and longevity.