Chrysanthemum Letitia Time Improved Breeding for Shelf Life and Growth Control
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Solution Overview
Problem
There is a need for a new Chrysanthemum morifolium cultivar that offers distinct characteristics such as cream white single flowers, larger and taller inflorescence, and slower growth rate compared to existing varieties like 'Swell Time' and 'Cool Time', while also differing from 'Icey Isle' in flower color and inflorescence size, with improved adaptability and longer shelf life.
Innovation Solution
The development of the 'Letitia Time Improved' Chrysanthemum variety, which is a result of controlled breeding, exhibits cream white single flowers, upright and free branching habit, medium to tall vigor, and a 28-day shelf life, suitable for pot culture with specific growth and temperature requirements, and is propagated via vegetative cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a cross between 'Swell Time' and 'Cool Time' is performed to create a new variety, then distinct flower color (cream white) and larger inflorescence are achieved, but growth rate control becomes variable and less predictable
Solution Approach 1:
The patent applies parameter changes by selecting and stabilizing specific growth characteristics in the new variety. The 'Letitia Time Improved' variety exhibits a slower, more controlled growth rate compared to its parents, with extended vegetative growth period and delayed flowering. This parameter change in growth rate allows for larger plant size and more developed inflorescence while maintaining cream white flower color, effectively resolving the contradiction between achieving distinct visual characteristics and controlling growth rate.
2Duration of action of stationary object
If the variety is designed for pot culture with extended shelf life, then commercial value and adaptability are improved, but growth response time increases
Solution Approach 1:
The patent applies preliminary action through controlled breeding programs that pre-establish the desired growth characteristics and shelf life traits in the 'Letitia Time Improved' variety. The variety is developed with inherent traits of slower growth response but extended shelf life, allowing commercial producers to plan cultivation schedules in advance. The plant's prolonged vegetative growth phase and delayed flowering provide a buffer period that extends the commercial window for harvesting and marketing, effectively managing the trade-off between growth response time and shelf life.
3Length of stationary object
If the inflorescence is made larger and taller compared to the female parent, then visual appeal and marketability are enhanced, but plant vigor and structural stability may be compromised
Solution Approach 1:
The patent applies local quality by differentiating the characteristics of various plant parts in the 'Letitia Time Improved' variety. The inflorescence is developed to be larger and taller with cream white coloring and light green disc, while the stem and foliage are optimized for structural support and vigor. The plant exhibits free branching habit with multiple lateral branches that provide structural stability to support the larger inflorescence. This localized optimization of different plant parts resolves the contradiction between achieving large inflorescence size and maintaining overall plant vigor and stability.
Data Source
AI summary
A new variety of Chrysanthemum plant named ‘Letitia Time Improved’, having creamy yellow buds and large cream white single flowers with a strong green disc.