Weigela Bokrasopin Compact Repeat-Flowering Cultivar
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Solution Overview
Problem
There is a need for compact, repeat-flowering Weigela plants with attractive leaf and flower colors that can perform well in various environmental conditions and cultural practices, as existing varieties may lack compactness, uniformity, and repeat-flowering habits.
Innovation Solution
A new cultivar of Weigela hybrida, 'Bokrasopin', was developed through planned breeding, combining traits such as compact and upright growth, freely branching habit, dark green leaves, red-purple flowers, and repeat-flowering capability, achieved through asexual reproduction by softwood cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional Weigela varieties are used, then they may produce flowers, but they lack compactness and uniformity in plant habit
Solution Approach 1:
The breeding program segmented the selection process into multiple generations (F1, F2, backcross generations) to progressively refine plant compactness and uniformity while maintaining genetic diversity through controlled cross-pollination events
Solution Approach 2:
The invention changed key plant parameters through selective breeding: reducing plant height and spread for compactness, selecting for uniform branching patterns, and stabilizing flower color and size variations across generations
2Duration of action of moving object
If existing Weigela varieties are used, then they flower once, but they lack repeat-flowering capability
Solution Approach 1:
The breeding program performed preliminary selective breeding over multiple years (cross-pollination in 2000, selection in 2007) to pre-establish the repeat-flowering trait before asexual reproduction, ensuring the genetic foundation was set before propagation
Solution Approach 2:
The invention achieved continuous flowering through repeat-flowering capability, allowing the plant to produce multiple flushes of flowers throughout the growing season rather than a single flowering event, maximizing the useful action of flower production
3Stability of the object's composition
If Weigela plants are propagated by seed, then genetic diversity is maintained, but trait stability and uniformity are reduced
Solution Approach 1:
The invention used asexual reproduction by softwood cuttings to create exact genetic copies of the selected plant, ensuring that the superior traits (compact habit, repeat-flowering, color characteristics) are replicated identically in all propagules without genetic variation
Solution Approach 2:
The breeding program discarded the F1 and F2 generation seeds that showed variable traits, and recovered only the superior plants that exhibited stable compact habit and repeat-flowering characteristics for further propagation
Data Source
AI summary
A new and distinct cultivar of Weigela plant named ‘Bokrasopin’, characterized by its relatively compact, upright and somewhat outwardly spreading plant habit; freely branching habit; dark green-colored leaves; freely and repeat-flowering habit; red purple-colored flowers; and good garden performance.