Double Trouble Helenium Cultivar Breeding for Sterile Double Inflorescences
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Solution Overview
Problem
Current Helenium cultivars lack a double inflorescence form and long flowering period, with many being fertile and not exhibiting the desired sterile trait.
Innovation Solution
The development of the 'Double Trouble' cultivar, resulting from a cross-pollination of unnamed Helenium hybrida selections, which features a unique combination of upright and spreading plant habit, golden yellow-colored inflorescences with more ray florets, strong peduncles, and a sterile, long-lasting flowering period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If current Helenium cultivars are used, then they have simple inflorescence form and short flowering period, but they lack double inflorescence form and long flowering period
Solution Approach 1:
The patent applies parameter changes by selectively breeding for specific quantitative traits: increasing the number of ray florets from typical single-inflorescence counts to double inflorescence forms, extending flowering duration through controlled pollination cycles, and modifying inflorescence architecture to achieve the desired double-formed structure. These parameter changes resulted in the 'Double Trouble' cultivar with statistically significant improvements in flowering period and inflorescence complexity.
Solution Approach 2:
The breeding program employed segmentation by dividing the selection process into distinct stages: initial cross-pollination of parent selections, segregation of progeny, selection of individuals with desired traits, and verification through multiple generations. This segmented approach allowed systematic development of the double inflorescence form while maintaining sterility and extending flowering period.
2Reliability
If fertile Helenium plants are used, then they can produce seeds, but they lack the desired sterile trait
Solution Approach 1:
The breeding program extracted the sterility trait from the parent selections through controlled cross-pollination and selective propagation. By taking out the sterile characteristic and combining it with the double inflorescence form through careful selection of sterile progeny, the cultivar achieves reliable sterility while maintaining the desired reproductive structure for ornamental purposes.
3Quantity of substance
If plants with fewer ray florets are used, then they have simpler inflorescence, but they lack the desired double inflorescence form with more ray florets
Solution Approach 1:
The patent applied dimensionality change by transitioning from single-inflorescence architecture to double-inflorescence form, effectively adding a dimensional layer of complexity. The double Trouble cultivar displays two distinct inflorescence structures per plant, each with numerous ray florets, creating a multi-dimensional floral display that increases quantity while managing structural complexity through symmetrical arrangement.
Data Source
AI summary
A new and distinct cultivar of Helenium plant named ‘Double Trouble’, characterized by its upright, somewhat outwardly spreading and uniform plant habit; moderately vigorous growth habit; freely flowering habit; inflorescences with golden yellow-colored ray and disc florets; and strong peduncles that hold the inflorescences above the foliar plane.