Prima White Chrysanthemum Compact Growth and Vigor Decoupling
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Solution Overview
Problem
There is a need for new Chrysanthemum cultivars with unique and attractive ray floret coloration, compact growth habits, and improved flowering characteristics that are not met by existing varieties.
Innovation Solution
A new Chrysanthemum cultivar, 'Prima White', resulting from a cross-pollination between proprietary selections of Chrysanthemum×morifolium, exhibiting compact, upright growth, dense branching, uniform flowering, and white-colored ray florets, which differs from its parents and other cultivars like 'Mariyo' in vigor, inflorescence size, and floret color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If existing Chrysanthemum varieties are used, then common growth habits are achieved, but unique and attractive ray floret coloration and compact growth habits are not obtained
Solution Approach 1:
The breeding program segmented the parental traits by selecting specific characteristics from each parent (vigor and branching from one parent, flowering habits and ray floret coloration from the other) to create a composite cultivar that achieves both compact growth and unique coloration
Solution Approach 2:
The invention applies local quality by achieving compact growth habit in the overall plant structure while maintaining vigorous branching locally, and by creating uniform white ray floret coloration specifically in the inflorescences while the plant maintains adaptive growth characteristics
2Reliability
If vigorous growth is achieved, then plant health is improved, but compact growth habit is compromised
Solution Approach 1:
The cultivar changes the growth parameter by achieving vigorous plant health through enhanced root and shoot development while simultaneously controlling the spatial parameters of plant height and spread to achieve a compact form, representing a decoupling of vigor from size
3Shape
If large inflorescences are produced, then ornamental value is enhanced, but plant vigor is reduced
Solution Approach 1:
The invention merges the trait of large inflorescence size with maintained plant vigor by combining selective breeding for oversized decorative-type inflorescences with selection for vigorous growth habits, achieving both characteristics in the same cultivar
4Strength
If brittle stems are present, then structural support is achieved, but flexibility and longevity of inflorescences are reduced
Solution Approach 1:
The cultivar develops stems with flexible structural properties that maintain sufficient mechanical support for inflorescences while possessing the flexibility to withstand environmental stresses, thereby extending the functional life and longevity of the inflorescences
Data Source
AI summary
A new and distinct cultivar of Chrysanthemum plant named ‘Prima White’, characterized by its compact, upright, outwardly spreading and rounded plant habit; freely branching habit; dense and full plant habit; uniform, freely and early flowering habit; and decorative-type inflorescences with white-colored ray florets.