Chrysanthemum Cultivar Cool Yoigloo Breeding
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Solution Overview
Problem
Current perennial garden Chrysanthemum cultivars lack uniformly rounded plant habit, consistent inflorescence forms, and attractive floret colors, with variations in flowering times and inflorescence sizes and colors among different cultivars.
Innovation Solution
The development of the new Chrysanthemum cultivar 'Cool Yoigloo' through cross-pollination of proprietary seedling selections, resulting in a uniformly mounded, freely branching plant with bright red-purple ray florets, uniform flowering, and longer-lasting inflorescences, which differ from its parents and comparatives in flowering timing, branching, and floret color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If cross-pollination of proprietary seedling selections is conducted to create new cultivars, then uniform plant habit and attractive floret colors are achieved, but breeding time and complexity increase
Solution Approach 1:
The inventors conducted preliminary selection and characterization of parent plants with desirable traits (uniform mounded habit, bright red-purple florets, free branching) before cross-pollination. This preliminary action ensured that the F1 generation would inherit stable, uniform characteristics, reducing the time needed for subsequent selection and stabilization steps.
2Stability of the object's composition
If inflorescence size is reduced to increase number of ray florets, then flowering uniformity improves, but inflorescence visual impact may decrease
Solution Approach 1:
The inventors changed the parameter of inflorescence size to a smaller dimension, which resulted in an increased number of ray florets per inflorescence. This parameter change achieved more uniform flowering across the plant while maintaining attractive visual characteristics through the increased floret count and bright coloration.
3Stability of the object's composition
If flowering time is delayed to achieve uniform flowering, then flowering uniformity improves, but adaptability to different environments may be reduced
Solution Approach 1:
The new cultivar 'Cool Yoigloo' exhibits universal flowering behavior that achieves uniform flowering across different environmental conditions. The plant maintains its uniform flowering characteristic whether grown in controlled greenhouse environments or outdoor nursery conditions, demonstrating adaptability to varying temperatures, day lengths, and light intensities.
4Duration of action of stationary object
If inflorescences are made longer-lasting, then garden performance improves, but energy allocation to seed production may decrease
Solution Approach 1:
The cultivar produces numerous inflorescences that maintain attractive appearance and color for extended periods (longer-lasting than comparative cultivars). While individual inflorescences may not produce abundant seeds, the overall garden performance is enhanced through the prolonged display of many colorful inflorescences, which serves the primary ornamental function.
Data Source
AI summary
A new and distinct cultivar of Chrysanthemum plant named ‘Cool Yoigloo’, characterized by its upright, outwardly spreading and mounding plant habit; freely branching habit; dense and full plant habit; uniform and freely flowering habit; duplex/decorative-type inflorescences with bright red purple-colored ray florets; and natural season flowering about September 24th in the Northern Hemisphere.