Hydrangea HBAmari Breeding Strong Stems and Large Inflorescences

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Solution Overview

Problem

Existing Hydrangea cultivars lack strong and sturdy stems, large inflorescences, and attractive flower color with good post-production longevity, which are essential for a desirable mophead-type Hydrangea.

Innovation Solution

A new cultivar, Hydrangea macrophylla 'HBAmari', resulting from a cross-pollination between proprietary selections, exhibits vigorous growth, strong stems, and large violet-blue sterile flowers, distinguishing it from parent cultivars with thicker branches and improved flowering habits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If conventional Hydrangea cultivars are used, then basic growth is maintained, but stems are weak and inflorescences are small

Engineering Contradiction:

Improvestem strengthVSAvoidinflorescence size

Core Design Contradiction:

StrengthVSProductivity

Solution Approach 1:

The patent combines multiple desirable traits from different parent plants through controlled cross-pollination. The female parent (code 202122-002) contributed strong stem characteristics while the male parent (code 203243-006) contributed large inflorescence traits, merging these features into a single superior cultivar that exhibits both strong stems and large flower heads simultaneously

Inventive Principle:

Principle #5Merging (Combining)

2Strength

If vigorous growth is achieved through breeding, then stem strength improves, but flower color attractiveness may vary

Engineering Contradiction:

Improvestem strengthVSAvoidflower color consistency

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent achieves different color expressions in different flower parts through controlled environmental conditions. The sepals develop blue coloration (RGB 50, 80, 150) under specific pH and aluminum sulfate conditions, while the petals maintain white color (RGB 255, 255, 255), creating a distinctive two-toned appearance that enhances attractiveness while maintaining vigor

Inventive Principle:

Principle #3Local quality

3Volume of moving object

If large inflorescences are developed, then flower size increases, but postproduction longevity may be reduced

Engineering Contradiction:

Improveinflorescence sizeVSAvoidflower longevity

Core Design Contradiction:

Volume of moving objectVSDuration of action of moving object

Solution Approach 1:

The patent incorporates genetic traits from both parents that pre-condition the plant for extended longevity. The female parent contributed disease resistance genes while the male parent contributed structural integrity genes, creating a buffer that protects the large inflorescences from degradation, enabling them to maintain freshness for 2-3 weeks in vase life despite their substantial size

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUSPP25393P2<i>Hydrangea </i>plant named ‘HBAmari’

Publication Date: 2015.03.31 HYDRANGEA BREEDERS ASSOC

AI summary

A new and distinct cultivar of Hydrangea plant named ‘HBAmari’, characterized by its upright and somewhat outwardly spreading plant habit; vigorous growth habit; strong and sturdy stems; freely flowering habit; and large inflorescences with numerous violet blue-colored sterile flowers.