Weigela 'Beth' Cultivar Leaf Shape and Light Tolerance
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Solution Overview
Problem
Existing Weigela cultivars lack unique leaf shapes and coloration, uniform plant habit, and hardiness, which limits their aesthetic appeal and adaptability in diverse environmental conditions.
Innovation Solution
The development of the Weigela florida cultivar 'Beth' through planned breeding, which exhibits a compact and uniform plant habit, freely branching habit, undulating leaf margins, red-purple flowers, and improved tolerance to high light conditions, distinguishing it from parent cultivars Rubidor and Variegata.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If existing Weigela cultivars are used, then basic flowering function is provided, but unique leaf shapes and coloration are lacking
Solution Approach 1:
The patent applies local quality by developing distinct leaf margin characteristics (undulating vs. entire) and coloration patterns (red margins, yellow-green venation) in specific regions of the leaf structure. This creates unique visual identification features that distinguish 'Beth' from other cultivars while maintaining overall plant health and function.
Solution Approach 2:
The patent utilizes color changes by documenting the developmental progression of leaf coloration - from red-colored margins in developing leaves to brighter green with yellow-green venation in fully expanded leaves during late summer. This dynamic coloration provides both unique identification and aesthetic appeal across different growth stages.
2Stability of the object's composition
If existing Weigela cultivars are used, then basic growth function is provided, but uniform plant habit is lacking
Solution Approach 1:
The patent applies segmentation by dividing the plant habit into distinct structural components - compact overall form with freely branching habit, specific branch distribution, and uniform spacing between lateral branches. This segmented approach to plant architecture creates predictability in growth patterns that enhances both uniformity and garden performance.
3Object-affected harmful factors
If existing Weigela cultivars are used, then basic light absorption is provided, but tolerance to high light conditions is insufficient
Solution Approach 1:
The patent applies parameter changes by modifying leaf physiological parameters in response to light conditions. The undulating leaf margins and specific coloration patterns (red margins, yellow-green venation) indicate adaptations in light absorption and reflection properties that enable tolerance to high light conditions while maintaining photosynthetic efficiency.
4Adaptability or versatility
If planned breeding program is implemented, then unique characteristics are developed, but breeding time and resources are required
Solution Approach 1:
The patent applies preliminary action by documenting the breeding program's systematic approach - selecting parent cultivars (Rubidor and unknown pollen parent), controlling pollination in 2004, and identifying the desired traits (undulating margins, red-purple flowers, compact habit) before full-scale propagation. This planned sequence accelerates the development of unique characteristics by focusing efforts on specific trait inheritance.
Solution Approach 2:
The patent applies copying by using asexual reproduction through cuttings to replicate the unique characteristics of the selected parent plant. Since 2005, asexual reproduction has been used to produce true-to-type copies of 'Beth', preserving the stable inheritance of undulating leaf margins, red-purple flower color, and compact habit without the time loss associated with repeated sexual breeding cycles.
Data Source
AI summary
A new and distinct cultivar of Weigela plant named ‘Beth’, characterized by its compact and uniform plant habit; freely branching habit; leaves with undulating margins; developing leaves with red-colored margins and fully expanded leaves that become brighter green in color with yellow green-colored venation during the late summer; red purple-colored flowers; and good garden performance.