Ground Cover Rose ‘WEKsusacofloc’ Color Stability and Disease Resistance
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Solution Overview
Problem
Current rose cultivars lack a variety with a low spreading growing habit, excellent color stability, and specific floral characteristics such as medium-sized, double flowers with medium yellow to buttery gold coloration, which are suitable for outdoor garden decoration and resistant to powdery mildew and rust.
Innovation Solution
The new Rosa hybrida variety 'WEKsusacofloc' is developed with a low spreading growth habit, medium-sized double flowers of medium yellow to buttery gold coloration, and resistance to powdery mildew and rust, propagated through asexual methods like budding and grafting, using 'INTerdust' as the seed parent and a non-disseminated seedling of City of San Francisco×(Neon Cowboy×Flower Carpet) as the pollen parent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional rose cultivars are used, then they may have larger flowers or different coloration, but they lack low spreading growing habit and color stability
Solution Approach 1:
The patent applies parameter changes by selecting and combining specific genetic parameters from parent varieties to achieve desired traits. The cross between 'INTerdust' and the non-disseminated seedling (City of San Francisco×(Neon Cowboy×Flower Carpet)) was designed to produce a plant with low spreading growth habit and excellent color stability, where the parent varieties provided different parameter combinations that were integrated in the offspring.
Solution Approach 2:
The new rose variety represents a composite genetic material combining traits from multiple parent varieties. The non-disseminated seedling itself is a composite (City of San Francisco×(Neon Cowboy×Flower Carpet)), and crossing it with 'INTerdust' creates a multi-parent composite that integrates low spreading habit, color stability, medium-sized double flowers, and disease resistance.
2Quantity of substance
If single to semi-double flowers are produced, then petalage is reduced, but flower doublet is lost
Solution Approach 1:
The patent utilizes parameter changes in petal development by selecting parents with different petalage characteristics. 'INTerdust' provides single to semi-double flowers with 5-10 petals, while the non-disseminated seedling provides semi-double flowers with 8-12 petals. The cross produces double flowers with 14-32 petals, achieving an optimization of petal quantity while maintaining flower form.
3Reliability
If medium yellow to buttery gold coloration is achieved, then color stability is improved, but flower size may be reduced
Solution Approach 1:
The patent applies parameter changes by selecting parent varieties with complementary traits. 'INTerdust' contributes light yellow coloration and smaller flower size, while the non-disseminated seedling contributes medium red coloration with yellow eye zone and larger flower size. The cross combines these parameters to produce medium yellow to buttery gold coloration with medium-sized flowers (4.4 to 5.6 cm diameter), achieving both color stability and acceptable flower size.
Data Source
AI summary
A new variety of Ground Cover rose suitable for garden decoration, having flowers of medium yellow to buttery gold coloration.