Euonymus Cultivar EUJACODEK Stable Mutation Breeding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for a distinct and stable Euonymus japonicus cultivar that exhibits unique characteristics such as larger leaves, pale yellow juvenile foliage, and a freely branching growth habit, which are not met by existing cultivars like 'Francien'.
Innovation Solution
The cultivar 'EUJACODEK' is a spontaneous mutation of Euonymus japonicus 'Francien' with stable and true-to-type features, including an abundance of pale yellow juvenile foliage, dark green glossy mature foliage, and a freely branching growth habit, achieved through asexual reproduction by softwood stem cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a spontaneous mutation is selected to create a new cultivar, then unique characteristics such as larger leaves and pale yellow juvenile foliage are achieved, but stability and true-to-type reproduction must be verified through multiple generations
Solution Approach 1:
The patent performs preliminary verification of the mutation's stability through asexual reproduction across multiple generations (at least three generations) before establishing the new cultivar. This preliminary action ensures that the unique characteristics are reliably inherited and the cultivar is true-to-type, resolving the contradiction between creating unique characteristics and ensuring their stable reproduction.
2Ease of manufacture
If the cultivar exhibits pale yellow juvenile foliage and intermediate foliage with green venation, then visual distinctiveness is improved, but the foliage color varies as it matures to dark green
Solution Approach 1:
The patent embraces the dynamic nature of foliage color change as the plant matures. The cultivar is characterized by having pale yellow juvenile foliage that transitions through intermediate stages with green venation to dark green mature foliage. This dynamic color progression is an inherent and stable characteristic of the cultivar, resolving the contradiction between visual distinctiveness and color consistency by accepting color variation as part of the plant's natural development cycle.
3Adaptability or versatility
If the cultivar is adapted to USDA Zones 8 to 11, then environmental adaptability is improved, but the phenotype may vary with environmental conditions such as temperature and light intensity
Solution Approach 1:
The patent recognizes that the cultivar exhibits different phenotypic expressions under different environmental conditions within its adapted range (USDA Zones 8-11). The genotype remains stable and true-to-type, while local phenotypic variations in foliage color and growth habit occur in response to specific environmental factors such as temperature, day length, and light intensity. This resolves the contradiction by maintaining genetic stability while accepting environmentally-induced phenotypic variations as normal adaptations.
Data Source
AI summary
A new and distinct Euonymus cultivar named ‘EUJACODEK’ which is characterized by the combination of a freely-branching, broad upright growth habit with dense foliage, an abundance of pale yellow juvenile foliage, pale yellow juvenile stems, an abundance of pale yellow intermediate foliage with green venation, intermediate foliage which becomes progressively suffused with green as it matures, dark green and glossy mature foliage, large mature foliage, and the stability of these characteristics from generation to generation.