Evolvulus Cultivar BURUSIERU Compact Growth and Branching

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Solution Overview

Problem

There is a need for a distinct cultivar of Evolvulus pilosus that exhibits specific horticultural traits such as shorter plant height, compact growth habit, and increased branching, which are not consistently observed in existing varieties under varying environmental conditions.

Innovation Solution

The cultivar 'BURUSIERU' is developed through planned breeding, characterized by its short overall plant height, compact and well-branched growth, narrow leaf shape, and stability across generations, differing from its parent variety and commercial counterparts like 'Blue Coral' in internode length and branching.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing Evolvulus varieties are grown under varying environmental conditions, then they exhibit variable phenotypes, but they fail to consistently display the desired horticultural traits such as short plant height and compact growth habit

Engineering Contradiction:

Improveconsistency of horticultural traitsVSAvoidenvironmental condition variability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies parameter changes by selecting and stabilizing specific genetic parameters through controlled breeding. The cultivar 'BURUSIERU' was developed through planned self-crossing to fix traits such as short plant height (20 cm), compact growth habit, and narrow leaf shape (0.7 cm width). These genetic parameter changes ensure consistent expression of desired horticultural characteristics across varying environmental conditions.

Inventive Principle:

Principle #35Parameter changes

2Length of moving object

If plant height is reduced to achieve compact growth, then space utilization improves, but branching may be reduced

Engineering Contradiction:

Improveplant heightVSAvoidbranching capacity

Core Design Contradiction:

Length of moving objectVSProductivity

Solution Approach 1:

The patent applies local quality by differentiating the growth characteristics of different plant parts. The cultivar 'BURUSIERU' exhibits short internode length (1.5 cm) creating compact overall height, while simultaneously maintaining very free branching with approximately 12 leaves per lateral branch and 21.7 cm lateral branch length. This local differentiation allows compact stature without sacrificing branching capacity.

Inventive Principle:

Principle #3Local quality

3Shape

If leaf width is reduced to achieve narrow leaf shape, then aesthetic appeal improves, but photosynthetic area may be reduced

Engineering Contradiction:

Improveleaf shapeVSAvoidphotosynthetic capacity

Core Design Contradiction:

ShapeVSUse of energy by moving object

Solution Approach 1:

The patent applies dimensionality change by compensating for reduced leaf width (0.7 cm) through increased leaf arrangement density and lateral branching. The narrow ovate leaves with acute apex and base are arranged alternately with approximately 12 leaves per lateral branch, and multiple lateral branches per node. This dimensional compensation in the vertical and radial dimensions maintains photosynthetic capacity despite narrow leaf shape.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20090113579P1Evolvulus plant named 'burusieru'

Publication Date: 2009.04.30 AKAI NOBUTAKA

AI summary

A new and distinct Evolvulus cultivar named ‘BURUSIERU’ is disclosed, characterized by a shorter, compact plant habit, prolific branching and more linear foliage. The new variety is an Evolvulus, and naturally blooms from early Spring through late Summer.