Yellow Greenrunner Chrysanthemum Cultivar Mutation
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Solution Overview
Problem
There is a need for a new and distinct cultivar of Chrysanthemum×morifolium that exhibits unique characteristics such as yellow-colored ray florets, early flowering, and decorative inflorescences, which are not present in existing cultivars like 'Green Runner' and 'Tardel', and can perform well in various environmental conditions.
Innovation Solution
A naturally occurring mutation of Chrysanthemum×morifolium 'Green Runner' resulting in 'Yellow Greenrunner', characterized by uniform, upright growth, freely branching, and dense flowering with yellow ray florets, which is stable through asexual reproduction by vegetative cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a new Chrysanthemum cultivar is developed with unique characteristics (yellow ray florets, decorative inflorescences), then the aesthetic value and distinctiveness are improved, but the complexity of breeding and selection increases
Solution Approach 1:
The patent utilizes a naturally occurring mutation that spontaneously arose in the 'Green Runner' cultivar. This self-service approach allowed the unique yellow ray floret characteristic to develop without human intervention in the mutation process, simplifying the breeding effort while ensuring genetic stability through natural selection mechanisms.
Solution Approach 2:
The invention captures a specific parameter change in the ray floret color (from white in parent to yellow in mutant) that occurred naturally. By selecting and propagating this specific parameter change through asexual reproduction, the patent maintains stability of the unique characteristic while avoiding the complexity of creating such changes through traditional breeding methods.
2Productivity
If the Chrysanthemum cultivar is bred to flower earlier than existing cultivars, then the productivity and market timing are improved, but the genetic stability and adaptability may be compromised
Solution Approach 1:
The patent preserves the early flowering trait by using asexual reproduction through cuttings, which creates exact genetic copies of the mutant plant. This copying method ensures that the early flowering characteristic and environmental adaptability are faithfully reproduced in all subsequent generations without genetic variation.
Solution Approach 2:
Instead of trying to accelerate flowering through complex breeding programs that might compromise adaptability, the patent inverted the approach by selecting a natural mutation that already possessed both early flowering and adaptability traits, then propagating it asexually to preserve both characteristics simultaneously.
3Shape
If the Chrysanthemum plant is selected for dense and full growth habit with freely branching, then the ornamental value is improved, but the plant complexity and cultivation requirements increase
Solution Approach 1:
The mutant plant exhibits a naturally occurring dense and full growth habit with free branching that requires no special cultivation techniques to achieve. This self-service characteristic means the plant naturally maintains its ornamental form under standard growing conditions, reducing cultivation complexity despite the complex appearance.
Solution Approach 2:
The patent captures a parameter change in the growth habit parameters (branching density, plant fullness, inflorescence distribution) that occurred through natural mutation. By selecting this specific parameter combination and propagating it asexually, the complex ornamental form is maintained without requiring complex cultivation management.
Data Source
AI summary
A new and distinct cultivar of Chrysanthemum plant named ‘Yellow Greenrunner’, characterized by its uniform, upright, outwardly spreading and rounded plant habit; moderately vigorous growth habit; freely branching habit; dense and full plant habit; freely flowering habit; decorative-type inflorescences with yellow-colored ray florets; long flowering period; and excellent garden performance.