Hemerocallis VER00322 Breeding for Compact Everblooming Habit
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Solution Overview
Problem
Current Hemerocallis cultivars lack compact, everblooming varieties with diverse flower colors, and existing cultivars with similar traits have differences in flower shape, color, and blooming periods.
Innovation Solution
Development of the new Hemerocallis cultivar 'VER00322' with dark red flowers and yellow throats, yellow midribs, and an everblooming habit from June to October, achieved through a breeding program in Noordwijk, The Netherlands, using proprietary seed and pollen parent lines, and stabilized through asexual propagation by division and tissue culture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If existing Hemerocallis cultivars are used, then they have established flower colors and shapes, but they lack compact habits and extended blooming periods
Solution Approach 1:
The breeding program systematically altered key parameters including flower color (dark red with yellow throat), plant height (compact 30-45cm), and blooming duration (extended from June to October). These parameter changes created a cultivar that simultaneously achieves compact habit and extended flowering period, resolving the technical contradiction between duration of action and structural complexity.
2Adaptability or versatility
If Hemerocallis cultivars with single color flowers are selected, then they have simpler appearance, but they lack diverse flower colors
Solution Approach 1:
The cultivar exhibits local quality differentiation within the flower structure: dark red coloration on the petal body, yellow throat at the center, and yellow midribs on the petals. This localized color variation provides visual complexity and diversity while maintaining a coherent overall flower form, resolving the contradiction between adaptability/versatility and shape simplicity.
3Reliability
If asexual propagation by division is used, then the cultivar can be reproduced, but propagation time and effort increase
Solution Approach 1:
The breeding program performed preliminary action by establishing stable genetic characteristics through multiple generations of controlled crosses and selection before propagation. The cultivar was thoroughly evaluated for trait stability across different growing conditions and propagation methods (division and tissue culture) before release, ensuring that subsequent propagation requires minimal time and effort while maintaining high reliability of characteristic reproduction.
Data Source
AI summary
A new cultivar of Hemerocallis named ‘VER00322’ that is characterized by its flowers that are dark red in color with yellow throats and distinct yellow midribs on the petals, its everblooming habit; blooming from the end of June to October in The Netherlands, and its dormant plant habit.