AUScrowd Shrub Rose Breeding for Petal Count and Disease Resistance

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Solution Overview

Problem

Current rose cultivars lack a variety that combines large, many-petalled blooms of deep pink with a strong fruity fragrance and a shapely, broad, rounded shrub with dark green foliage, which are desirable characteristics for rose enthusiasts.

Innovation Solution

The development of a new Rosa hybrida shrub variety, 'AUScrowd', which is characterized by large, many-petalled blooms of deep pink that pale over time, a strong fruity fragrance, and dark green foliage, achieved through asexual reproduction by budding on an unpatented Rosa dumetorum 'Laxa' rootstock, distinguishing it from existing cultivars like 'AUSpike' and 'AUSvibrant'.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If existing rose cultivars are used, then they have smaller blooms with fewer petals, but they lack the combination of large many-petalled deep pink blooms with strong fruity fragrance and shapely rounded shrub

Engineering Contradiction:

Improvenumber of petalsVSAvoidcombination of characteristics

Core Design Contradiction:

Quantity of substanceVSAdaptability or versatility

Solution Approach 1:

The patent combines multiple desirable traits (large bloom size, many petals, deep pink color, strong fruity fragrance, and shapely rounded shrub form) into a single rose cultivar through controlled cross-breeding, merging characteristics that were previously分散 in different cultivars

Inventive Principle:

Principle #5Merging (Combining)

2Shape

If existing rose cultivars are used, then they have simpler shrub forms, but they lack the broad rounded shapely form with dark green foliage

Engineering Contradiction:

Improveshrub formVSAvoidcomplexity of characteristics

Core Design Contradiction:

ShapeVSDevice complexity

Solution Approach 1:

The patent develops a rose cultivar with specific localized characteristics including broad rounded shrub form, dark green foliage, and profuse blooming habit, creating distinct quality features in different parts of the plant

Inventive Principle:

Principle #3Local quality

3Quantity of substance

If existing rose cultivars are used, then they have fewer petals (around 90), but they lack the approximately 125 petals with round bloom shape

Engineering Contradiction:

Improvenumber of petalsVSAvoidbloom symmetry

Core Design Contradiction:

Quantity of substanceVSManufacturing precision

Solution Approach 1:

The patent achieves a significant increase in petal count from around 90 to approximately 125 petals per bloom, while simultaneously improving bloom symmetry to a perfectly round shape when viewed from above, through selective breeding parameter optimization

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUSPP32849P2Shrub rose plant named ‘AUScrowd’

Publication Date: 2021.03.02 DAVID AUSTIN ROSES

AI summary

A variety of rose plant of the shrub class, named ‘AUScrowd’. The ‘AUScrowd’ is a variety of a rose shrub having vigorous roses on a broad, rounded shrub with dark green foliage. The shrub bears large, many-petalled rosette blooms of a deep pink and outer petals of each bloom that pale slightly over time and have a strong fruity fragrance.