Echeveria ECRAQ03-0 Cultivar with Temperature-Responsive Leaf Coloration

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Solution Overview

Problem

Existing Echeveria cultivars lack distinct leaf margin undulation and temperature-dependent foliage coloration, limiting their ornamental value and commercial appeal.

Innovation Solution

The Echeveria cultivar 'ECRAQ03-0' is developed through crossbreeding, exhibiting a distinctive red leaf margin, temperature-dependent leaf color change from dark red in winter to medium green in summer, and a non-branching rosette form, achieved through asexual reproduction by tissue culture.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If conventional Echeveria cultivars are used, then basic horticultural characteristics are maintained, but leaf margin undulation and temperature-dependent coloration are lacking

Engineering Contradiction:

Improvetemperature-dependent colorationVSAvoidfoliage color consistency

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The cultivar exhibits parameter changes in foliage color based on temperature conditions. The leaf color transitions from dark red in winter (lower temperatures) to medium green in summer (higher temperatures), while the leaf margin maintains consistent red coloration across all temperatures. This temperature-responsive color change enhances ornamental versatility without compromising plant stability.

Inventive Principle:

Principle #35Parameter changes

2Shape

If existing Echeveria varieties are used, then general ornamental properties are provided, but distinctive leaf margin undulation and red coloration are absent

Engineering Contradiction:

Improveleaf margin undulationVSAvoidundulation consistency

Core Design Contradiction:

ShapeVSManufacturing precision

Solution Approach 1:

The leaf margin exhibits distinct local quality characteristics with tight undulations and red coloration that differ from the rest of the leaf blade. This localized feature creates a visually striking contrast while maintaining overall plant health and stability, providing unique ornamental value without requiring changes to the entire plant structure.

Inventive Principle:

Principle #3Local quality

3Adaptability or versatility

If crossbreeding is performed to achieve unique characteristics, then ornamental value is enhanced, but breeding complexity increases

Engineering Contradiction:

Improveornamental characteristicsVSAvoidbreeding program complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The breeding program leveraged the natural genetic variation present in the parent lines to produce the desired traits. The cross between Echeveria gibbiflora 'Line 127' and 'Line 176' naturally yielded seedlings with the distinctive red leaf margin and temperature-dependent coloration, reducing the need for complex artificial selection and intervention processes.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUSPP26385P3<i>Echeveria </i>plant named ‘ECRAQ03-0’

Publication Date: 2016.02.02 OATES JOHN DAVID

AI summary

A new and distinct Echeveria cultivar named ‘ECRAQ03-0’ is disclosed, characterized by a non-branching rosulate plant form, long pink scape, unique leaf margin coloration and tight leaf edge undulations. Additionally, leaf color varies with temperature. The new variety is an Echeveria, normally produced as an ornamental garden or container plant.