Hemerocallis Raspberry Eclipse Hybrid Daylily Breeding
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Solution Overview
Problem
Existing daylily cultivars lack a combination of winter hardiness, compact habit, fragrant flowers, and extended flowering period with specific color and structural traits, such as raspberry-purple flowers with a ruffled lemon-yellow edge and light green throat, which are not well-represented in the nearly 90,000 registered daylilies.
Innovation Solution
The development of Hemerocallis 'Raspberry Eclipse', a hybrid daylily with a winter-hardy, compact habit, fragrant raspberry-purple flowers featuring a lavender-purple band and ruffled lemon-yellow edge, and three-way branched scapes producing up to 14 flowers, bred by combining 'Southern Wind' and 'Spiny Sea Urchin' parents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing daylily cultivars are used, then they have various flower colors and forms, but they lack the specific combination of winter hardiness, compact habit, fragrant flowers with extended flowering period
Solution Approach 1:
The patent combines multiple desirable traits from different parent plants into a single hybrid cultivar. The new daylily merges the winter hardiness and compact habit from one parent with the fragrant flowers and extended flowering period from another, creating a unified plant that reliably exhibits all four characteristics simultaneously.
2Duration of action of moving object
If daylilies with extended flowering period are bred, then the flowering duration increases, but the plant size and scape height may increase reducing compactness
Solution Approach 1:
The patent achieves extended flowering period through controlled breeding that modifies genetic parameters without proportionally increasing plant size. The hybridization process allows for independent optimization of flowering duration and plant dimensions, resulting in a cultivar with prolonged bloom time while maintaining compact scape height of 67 cm.
3Volume of moving object
If compact habit is selected for, then the plant size decreases, but the number of flowers per scape and branching may be reduced
Solution Approach 1:
The patent applies local quality by concentrating floral production in specific regions of the compact plant. The three-way branched scapes create multiple localized flowering zones, allowing the plant to maintain small overall size while achieving high flower density in key areas, with up to 14 flowers per scape.
Data Source
AI summary
A new and distinct Hemerocallis plant named ‘Raspberry Eclipse’ characterized by winter-hardy compact habit with clean medium-green foliage possessing a purplish-bronze blush that goes dormant in the winter. The flowers are rounded, fragrant, single flowers with raspberry-purple, a lavender-purple band and are highlighted by a ruffled lemon-yellow picotee edge and light green throat. Both tepal sets are slightly reflexed with the outer tepal set having consistent, considerable, yellow crisped margins. The new plant flowers up to 67 cm tall with three-way branching beginning about mid-July.