Spiraea Odessa Cultivar Compact Growth Habit Breeding
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Solution Overview
Problem
Current Spiraea cultivars lack compact growth habits and rich flower colors suitable for small hedges or mass plantings, limiting their aesthetic and landscaping applications.
Innovation Solution
Development of a new Spiraea japonica cultivar, 'Odessa', resulting from controlled cross-pollination between 'Little Princess' and 'Bullata', exhibiting deep rosy-pink flowers, dark green foliage, and a moderately vigorous, compact-globular growth habit, achieved through asexual reproduction by softwood cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional Spiraea cultivars are used, then they have established growth habits and flower colors, but they lack compact growth habits and rich flower colors suitable for small hedges or mass plantings
Solution Approach 1:
The patent applies parameter changes by selecting and breeding plants with specific growth habit parameters (compact, globular shape) and flower color parameters (deep rosy-pink). Through controlled cross-pollination and selective breeding, the cultivar 'Odessa' was developed with optimized parameters including a compact growth habit (30-60 cm height and spread), globular shape, and deep rosy-pink flowers, making it suitable for small hedges and mass plantings where conventional cultivars failed.
2Shape
If larger Spiraea cultivars are used, then they have more prominent flowers, but they are not suitable for small hedges or compact landscaping applications
Solution Approach 1:
The patent applies local quality by concentrating flowering resources in a compact form. The 'Odessa' cultivar produces deep rosy-pink flowers (corolla diameter 5-8 mm) that are visually prominent relative to the compact plant size. The flowers are arranged in corymbose inflorescences that create a dense display, providing prominent floral presence without requiring large plant dimensions, thus solving the contradiction between flower prominence and compact size.
3Shape
If Spiraea cultivars with compact growth habit are developed, then they are suitable for small hedges, but they may have reduced flower color richness or vigor
Solution Approach 1:
The patent applies feedback through systematic evaluation and selection during the breeding process. Multiple generations of controlled cross-pollination were performed with careful observation and selection of plants exhibiting both compact growth habit and deep rosy-pink flower color. The breeding program monitored and selected for consistent expression of these traits, ensuring that the 'Odessa' cultivar reliably maintains both compact form (30-60 cm height, globular shape) and rich flower color across generations.
Data Source
AI summary
A new and distinct cultivar of Spiraea plant named ‘Odessa’, characterized by its deep rosy-pink colored flowers, dark green-colored foliage, and moderately vigorous, compact-globular growth habit, is disclosed.