Deksnowflake Chrysanthemum Breeding for Uniform Flowering and Longevity
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Solution Overview
Problem
Current Chrysanthemum cultivars lack unique ray floret coloration and exhibit variable post-production longevity, with a need for semi-double-type cultivars that flower uniformly and maintain freshness for an extended period.
Innovation Solution
The development of the 'Deksnowflake' cultivar, resulting from a cross-pollination of proprietary Chrysanthemum selections, which features semi-double inflorescences with white ray florets and green disc florets, strong upright stems, early and uniform flowering, and prolonged post-production longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional Chrysanthemum cultivars are used, then they have established growth habits, but they lack unique ray floret coloration and exhibit variable post-production longevity
Solution Approach 1:
The patent applies parameter changes by selecting and stabilizing specific genetic parameters through controlled cross-pollination. The breeding program targeted specific parameters including ray floret color (white), disc floret color (green), inflorescence type (semi-double), and flowering uniformity. By changing these genetic parameters through selective breeding, the cultivar achieves both reliable post-production longevity and uniform unique coloration.
2Productivity
If early flowering is achieved through breeding, then uniform flowering response is improved, but post-production longevity may be compromised
Solution Approach 1:
The patent resolves this contradiction by changing multiple genetic parameters simultaneously through controlled breeding. The selected parameters include flowering time (early and uniform), inflorescence type (semi-double), ray floret color (white), and post-production longevity. The cultivar 'Deksnowflake' flowers approximately 48 days after photoinductive treatments, achieving both early uniform flowering and extended post-production longevity of about three weeks in interior environments.
3Shape
If semi-double inflorescence type is selected, then unique coloration pattern is achieved, but flowering vigor may be reduced
Solution Approach 1:
The patent applies parameter changes by selecting for semi-double inflorescence type while simultaneously selecting for vigorous growth habits. The breeding program targeted specific parameters including inflorescence type (semi-double with 20-30 ray florets), growth vigor (moderate to strong), and flowering uniformity. The resulting cultivar maintains strong upright stems and moderate to strong vigor despite the semi-double classification.
Data Source
AI summary
A new and distinct cultivar of Chrysanthemum plant named ‘Deksnowflake’, characterized by its semi-double-type inflorescences with oval to obovate-shaped, white-colored ray florets and green-colored disc florets; strong and upright flowering stems; freely flowering habit; early and uniform flowering response; and good postproduction longevity.