Daphne MonStrk Cultivar Variegated Leaf Stability

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Solution Overview

Problem

There is a need for a new cultivar of Daphne odora that exhibits distinct variegated leaves with a wide yellow margin and elongated foliage, which are stable across different environmental conditions, as existing varieties do not consistently display these traits.

Innovation Solution

The cultivar 'MonStrk' is developed through semi-hardwood cuttings, showcasing variegated leaves with a wide yellow margin and elongated foliage, which are similar to Daphne odora 'Aureomarginata' but with a thicker yellow margin, and comparable to Daphne odora 'Rogbret' in overall plant habit, demonstrating stability across multiple generations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing Daphne odora varieties are used, then general horticultural characteristics are maintained, but distinct variegated leaves with wide yellow margin and elongated foliage are not consistently displayed

Engineering Contradiction:

Improveconsistency of variegated leaf traitsVSAvoidenvironmental adaptability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies parameter changes by selecting and propagating a mutant plant with altered genetic parameters that result in thicker yellow margins and elongated foliage. The semi-hardwood cutting propagation method maintains these altered parameters across generations, ensuring trait consistency while the cultivar demonstrates adaptability to various environmental conditions including temperature ranges from -8°C to 35°C.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If Daphne odora 'Aureomarginata' is used as parent variety, then commercial availability is maintained, but foliage yellow margin thickness is insufficient

Engineering Contradiction:

Improvecommercial propagation feasibilityVSAvoidyellow margin thickness

Core Design Contradiction:

Ease of operationVSShape

Solution Approach 1:

The patent applies local quality by focusing on the specific local characteristic of the yellow margin thickness. The mutant plant exhibits locally enhanced yellow pigmentation in the leaf margins, creating a distinct visual feature while maintaining the overall plant structure and propagation characteristics of the parent variety Daphne odora 'Aureomarginata'.

Inventive Principle:

Principle #3Local quality

3Manufacturing precision

If Daphne odora 'Rogbret' is used for comparison, then commercial variety benchmark is established, but plant habit openness and yellow margin thickness are insufficient

Engineering Contradiction:

Improvehorticultural standard consistencyVSAvoidplant habit and foliage shape

Core Design Contradiction:

Manufacturing precisionVSShape

Solution Approach 1:

The patent applies asymmetry by developing a cultivar with asymmetric visual characteristics - the broad, open plant habit creates an asymmetric overall form, and the thick yellow margins create asymmetric contrast against the green leaf centers. This distinguishes 'MonStrk' from the more uniform appearance of 'Rogbret' while maintaining commercial viability.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUSPP28725P3<i>Daphne </i>plant named ‘MonStrk’

Publication Date: 2017.12.05 MONROVIA NURSERY CO

AI summary

A new and distinct Daphne cultivar named ‘MonStrk’ is disclosed, characterized by variegated leaves with a distinctive large yellow margin. Foliage is distinctively elongated. The new cultivar is a Daphne, suitable for ornamental garden purposes.