Dekcatta Chrysanthemum Breeding for Semi-Double Inflorescence and Stem Strength
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Solution Overview
Problem
Current Chrysanthemum cultivars lack semi-double inflorescences with quilled ray florets, strong flowering stems, short response time, and excellent post-production longevity, which are desirable traits for cut flower production.
Innovation Solution
A new cultivar, 'Dekcatta', resulting from a cross-pollination of proprietary selections of Chrysanthemum×morifolium, exhibits semi-double inflorescences with light purple quilled ray florets, strong and upright stems, early flowering, and prolonged post-production longevity, achieved through asexual reproduction by terminal cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional Chrysanthemum cultivars are used, then they have simple inflorescence structures, but they lack semi-double inflorescences with quilled ray florets
Solution Approach 1:
The patent combines multiple desirable traits from different parent plants through controlled cross-pollination. The female parent (code 04.42081.03) contributed semi-double inflorescence structure, while the male parent (code 05.39491.01) contributed other desirable characteristics. This merging of genetic material from two distinct cultivars produced 'Dekcatta' with the desired semi-double inflorescences featuring quilled ray florets.
2Shape
If Chrysanthemum cultivars with semi-double inflorescences are developed, then inflorescence complexity increases, but stem strength may be compromised
Solution Approach 1:
The patent achieved local quality optimization by selecting specific parental lines with complementary traits. The female parent was selected for semi-double inflorescence quality, while the male parent selection contributed strong stem characteristics. The resulting 'Dekcatta' cultivar exhibits both semi-double inflorescences with quilled ray florets and strong, upright flowering stems capable of supporting the inflorescence weight.
3Duration of action of moving object
If Chrysanthemum plants with extended postproduction longevity are created, then flower duration increases, but response time may be prolonged
Solution Approach 1:
The patent employed preliminary action through careful pre-breeding selection and controlled cross-pollination timing. The parental lines were pre-selected for desirable traits including a balance between response time and postproduction longevity. The controlled greenhouse environment and timing of cross-pollination events allowed optimization of both flowering response time and subsequent vase life, achieving excellent postproduction longevity without excessive delay in flowering.
Data Source
AI summary
A new and distinct cultivar of Chrysanthemum plant named ‘Dekcatta’, characterized by its relatively small semi-double type inflorescences with light purple-colored quilled ray florets; strong and upright flowering stems; short response time; uniform and freely flowering habit; and excellent postproduction longevity.