Compact Fragrant Rose Resisting Common Diseases

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Solution Overview

Problem

There is a need for a rose variety that combines compact growth habit, fragrant pink flowers, disease resistance, ease of propagation, extended flowering period, heat tolerance, and cold hardiness, which existing rose varieties do not adequately address.

Innovation Solution

The development of the Rosa×hybrida variety 'ZARsunfrapk', resulting from a cross between 'MORsegold' and KNOCK OUT 'RADrazz', which exhibits compact growth, fragrant pink flowers, resistance to powdery mildew, rust, and black spot, and is heat and cold hardy, with ease of propagation and long-lasting flowering.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If a rose variety is bred for compact growth habit, then the plant size is reduced and requires less pruning, but the flowering period and fragrance intensity may be compromised

Engineering Contradiction:

Improveplant sizeVSAvoidflowering period

Core Design Contradiction:

Volume of moving objectVSDuration of action of moving object

Solution Approach 1:

The patent combines multiple desirable traits from different parent varieties into a single hybrid rose variety. The compact growth habit from one parent is merged with extended flowering capability and fragrance from the other parent, achieving a plant that simultaneously exhibits small size and long-lasting blooms throughout the growing season.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If a rose variety is bred for disease resistance, then resistance to powdery mildew, rust, and black spot is improved, but the flower color intensity and fragrance may be reduced

Engineering Contradiction:

Improvedisease resistanceVSAvoidflower quality

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent applies local quality by providing different traits to different parts of the plant system. The foliage and structural components exhibit strong disease resistance traits, while the flowers maintain intense color and fragrance. This allows the plant to have localized disease resistance without compromising overall floral quality.

Inventive Principle:

Principle #3Local quality

3Adaptability or versatility

If a rose variety is bred for heat tolerance and cold hardiness, then the adaptability to different climates is improved, but the growth vigor and flowering intensity may be compromised

Engineering Contradiction:

Improveclimate toleranceVSAvoidgrowth vigor

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent creates a multi-functional rose variety that simultaneously performs multiple functions: it tolerates both heat and cold extremes, maintains disease resistance, produces fragrant flowers, and exhibits vigorous growth. This universal variety can adapt to diverse climate zones while maintaining high productivity and flowering intensity throughout the growing season.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUSPP25847P2Miniature rose plant named ‘ZARsunfrapk’

Publication Date: 2015.09.01 AMERICAN DAYLILY & PERENNIALS

AI summary

A new rose plant designated ‘ZARsunfrapk’ particularly distinguished by being a landscape (miniature) shrub rose having fragrant pink flowers, a compact growth habit requiring little pruning, easy to root and propagate, shows resistance to powdery mildew, rust, and black spot, grows vigorously on its own roots, shown to be heat tolerant and cold hardy in trials, and hardy to USDA Zones 5 to 10 is disclosed.