Miniature Rose JACdandy Breeding for Compact Size and Disease Resistance

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Solution Overview

Problem

There is a need for a new miniature rose variety that combines the vigor and own root capabilities of one parent with the small flowers and foliage of another, while also offering improved disease resistance and ease of propagation.

Innovation Solution

The development of the 'JACdandy' miniature rose, achieved by crossing 'JACbow' and 'Chipmunk', results in a compact, disease-resistant plant with unique flower colors and improved rooting capabilities, distinct from its parents and other varieties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a cross between 'JACbow' and 'Chipmunk' is performed to combine vigor and own root capabilities with small flowers and foliage, then the plant vigor and rooting capability are improved, but the plant size increases beyond the miniature scale

Engineering Contradiction:

Improveown root capabilityVSAvoidplant height

Core Design Contradiction:

ReliabilityVSLength of stationary object

Solution Approach 1:

The breeding process involved selecting and combining specific genetic parameters from parent plants to achieve the desired balance. The F1 hybrid 'JACdandy' exhibits intermediate parameters for plant size (60-80 cm height) while maintaining improved rooting capability, representing a parameter optimization between the vigorous but large 'JACbow' and the small but weak-rooting 'Chipmunk'

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The 'JACdandy' hybrid combines multiple functions: it maintains the own-root capability and vigor of 'JACbow' while simultaneously achieving the compact size and small flowers of 'Chipmunk'. This multi-functional plant serves both as a vigorous, disease-resistant variety and as a true miniature rose suitable for compact spaces

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Length of stationary object

If selection focuses on compact growth habit and small flowers, then plant size is reduced, but disease resistance and rooting capability are compromised

Engineering Contradiction:

Improveplant sizeVSAvoiddisease resistance

Core Design Contradiction:

Length of stationary objectVSReliability

Solution Approach 1:

The breeding strategy applied local quality by selecting specific traits from each parent: compact growth habit and small flowers from 'Chipmunk', while disease resistance and vigor from 'JACbow'. The resulting 'JACdandy' hybrid exhibits locally optimized characteristics, being compact (60-80 cm) yet possessing strong disease resistance to rust and powdery mildew

Inventive Principle:

Principle #3Local quality

3Ease of manufacture

If propagation is attempted from soft wood cuttings, then ease of propagation is improved, but rooting success rate varies without proper selection

Engineering Contradiction:

Improveease of propagationVSAvoidrooting success rate

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The 'JACdandy' hybrid exhibits self-service capability in propagation through its exceptional ease of rooting from soft wood cuttings. The plant's genetic constitution enables reliable vegetative propagation without requiring complex propagation techniques or special conditions, making it self-sufficient for multiplication

Inventive Principle:

Principle #25Self-service

Data Source

PatentUSPP19485P2Miniature rose plant named 'JACdandy'

Publication Date: 2008.11.25 JACKSON & PERKINS WHOLESALE INC

AI summary

Miniature rose plant having novel lavender pink and brown flower color; compact, well-branched plant habit of growth; ease of own root rooting from soft wood cuttings; and resistance to rust and powdery mildew.