Karma Red Corona Dahlia Breeding for Longevity and Color
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Solution Overview
Problem
Current Dahlia cultivars lack a freely flowering habit with attractive and long-lasting inflorescences, particularly in terms of ray floret color and post-production longevity, which are essential for cut flower arrangements.
Innovation Solution
The Dahlia hybrida cultivar 'Karma Red Corona' is developed through asexual reproduction by cuttings, exhibiting an upright and spreading plant habit, strong peduncles, decorative inflorescence form, bright red ray florets, and superior post-production longevity, distinguishing it from parent and comparative cultivars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If Dahlia cultivars are bred for decorative inflorescence form and attractive ray floret coloration, then aesthetic quality is improved, but postproduction longevity may be compromised
Solution Approach 1:
The patent applies parameter changes by selecting and stabilizing specific genetic traits through asexual reproduction. The cultivar 'Karma Red Corona' was selected from a population of 'Karma Corona' plants and propagated by cuttings to preserve the unique combination of decorative inflorescence form (parameter_id: 12) and extended postproduction longevity (parameter_id: 16). This method maintains the aesthetic qualities while ensuring the flowers last longer in postproduction settings compared to the parent cultivar.
2Ease of manufacture
If Dahlia cultivars are bred for attractive ray floret coloration, then aesthetic quality is improved, but color stability under varying environmental conditions may be compromised
Solution Approach 1:
The patent applies the inversion principle by reversing the conventional approach to color breeding. Instead of selecting for colors that naturally vary with environmental conditions, the breeder selected a mutation with extreme red coloration and then propagated it asexually by cuttings. This inverted approach ensures color consistency (parameter_id: 32) by eliminating genetic variation, while the plant maintains adaptability (parameter_id: 35) through its robust growth habit and ability to thrive in various conditions.
3Productivity
If Dahlia cultivars are selected for freely flowering habit, then productivity is improved, but individual inflorescence quality may be compromised
Solution Approach 1:
The patent applies the merging principle by combining two previously separate selection criteria into a single cultivar. The breeder merged the freely flowering habit (parameter_id: 39) typically associated with lower individual flower quality with the decorative inflorescence form (parameter_id: 12) and attractive coloration. The resulting cultivar 'Karma Red Corona' simultaneously exhibits high productivity through frequent flowering and superior individual inflorescence quality, resolving the traditional trade-off between quantity and quality.
Data Source
AI summary
A new and distinct cultivar of Dahlia plant named ‘Karma Red Corona’, characterized by its upright and somewhat outwardly spreading plant habit; strong and erect peduncles; freely flowering habit; decorative-type inflorescence form; large inflorescences with bright red-colored ray florets; and good garden performance and postproduction longevity.