Floribunda Rose WEKjunjuc Breeding for Color Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current rose cultivars lack a combination of moderate fragrance, excellent color stability, and large flower size, along with a bushy rounded growing habit suitable for outdoor garden decoration.
Innovation Solution
The new Rosa hybrida variety 'WEKjunjuc' combines moderate licorice to apple-like fragrance, excellent color stability, and large flower size, with a bushy rounded growing habit, distinguished from its parents 'WEKlezpat' and 'WEKvossutono' in terms of flower color, petal count, and growth habit, and can be asexually propagated by cuttings, budding, and grafting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If rose cultivars are bred for large flower size, then flower dimensions increase, but color stability deteriorates
Solution Approach 1:
The patent applies parameter changes by selectively breeding for specific genetic traits that control both flower size and color stability simultaneously. The cultivar 'WEKjunjuc' was developed through controlled cross-breeding between 'WEKlezpat' and 'WEKvossutono' to achieve optimal parameters for flower diameter (10-15 cm), petal count (30-41 petals), and color consistency (sparkling clear yellow) without the trade-off that typically exists between these attributes.
2Object-generated harmful factors
If rose cultivars are bred for strong fragrance, then aromatic properties intensify, but color stability deteriorates
Solution Approach 1:
The patent resolves this contradiction by changing the genetic parameters through selective breeding to achieve a balanced expression of fragrance and color traits. The cultivar 'WEKjunjuc' was specifically bred to maintain sparkling clear yellow color stability while incorporating moderate licorice to apple-like fragrance, avoiding the color instability that typically accompanies strong fragrance breeding in other rose cultivars.
3Shape
If rose cultivars are bred for bushy rounded habit, then aesthetic appeal for garden decoration improves, but plant height decreases
Solution Approach 1:
The patent applies local quality by creating a cultivar with differentiated growth characteristics - the plant develops a bushy, rounded canopy form ideal for garden decoration while maintaining a controlled medium height. The cultivar 'WEKjunjuc' exhibits this local quality distinction with its compact, spreading habit (120-150 cm height, 170-200 cm spread) that concentrates aesthetic value in the flowering canopy rather than vertical growth.
4Quantity of substance
If petal count is increased to create double flowers, then flower fullness improves, but fragrance intensity decreases
Solution Approach 1:
The patent resolves this contradiction through parameter changes in the breeding process, selecting for a specific petal count range (30-41 petals) that maintains adequate fragrance expression. The cultivar 'WEKjunjuc' achieves double flower classification with substantial petalage while preserving moderate licorice to apple-like fragrance, unlike fully double roses that often have reduced or absent fragrance due to fewer functional reproductive structures.
Data Source
AI summary
A new variety of Floribunda rose suitable for garden decoration, having flowers of sparkling clear yellow coloration.