Zanmubutter Chrysanthemum Breeding for Extended Flowering
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Solution Overview
Problem
Existing chrysanthemum cultivars lack a double type inflorescence with a natural season flowering date around September 15, and there is a need for new cultivars that bloom for a longer period without using growth retardants.
Innovation Solution
The development of the 'Zanmubutter' cultivar, resulting from a cross between female parent 17502 and male parent 26356, which features white to cream-colored ray-florets and a natural blooming period of about 4 to 5 weeks, differing from its parents in flower color and exhibiting vigorous growth with larger plant size and later seasonal blooming compared to similar cultivars like 'Zanmuglow'.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If existing chrysanthemum cultivars are used, then they have established flowering periods, but they lack double type inflorescence and do not bloom around September 15 with extended duration
Solution Approach 1:
The patent applies parameter changes by selecting and breeding plants with specific genetic traits that alter the flowering period parameters. The cross between female parent 17502 and male parent 26356 produced offspring with modified flowering time (around September 15) and extended duration (4-5 weeks), achieving the desired parameter transformation for reliable seasonal blooming.
2Duration of action of moving object
If growth retardants are used to extend blooming period, then flowering duration increases, but the solution becomes more complex and requires chemical interventions
Solution Approach 1:
The patent implements self-service by breeding chrysanthemum cultivars that naturally extend their flowering period without requiring external chemical interventions. The genetically modified plants self-regulate their blooming duration (4-5 weeks) through inherited traits from the parent plants, eliminating the need for growth retardants and simplifying cultivation procedures.
3Shape
If ray-floret color is changed to white or cream, then aesthetic appeal is improved, but this differs from parent plant colors requiring selective breeding
Solution Approach 1:
The patent applies local quality by focusing the breeding selection on the specific trait of ray-floret color while maintaining other desirable characteristics from the parent plants. The selective breeding process targeted the color phenotype (white to cream ray-florets) in the offspring, achieving the desired aesthetic improvement through localized trait selection rather than complete redesign of the plant.
Data Source
AI summary
A chrysanthemum plant named ‘Zanmubutter’ characterized by its medium sized blooms with white to cream ray florets and a cream center and prolific branching; natural season flowering date September 22; blooming for a period of about 4 to 5 weeks.