Red Maple JFS-KW78 Narrow Columnar Form Breeding
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Solution Overview
Problem
There is a need for a cultivar of Acer rubrum that exhibits a unique combination of tightly upright fastigiate branching, an extremely narrow to columnar form, small leaves with long acuminate tips, and bright fall color, which are not adequately met by existing commercial cultivars.
Innovation Solution
The cultivar 'JFS-KW78' is developed through selective breeding and asexual propagation, showcasing these distinct characteristics and maintaining them across generations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional Acer rubrum cultivars are used, then general growth and vigor are maintained, but the desired narrow columnar form and tightly upright branching are not achieved
Solution Approach 1:
The patent applies parameter changes by selecting and propagating a mutant individual ('JFS-KW78') that exhibits dramatically altered growth parameters compared to the species norm. The selected tree displays a narrow columnar form with tightly upright fastigiate branching, contrasting with the typical broad spreading habit of Acer rubrum. This parameter change in growth form was fixed through asexual propagation methods including chip budding, softwood cuttings, and micropropagation, creating a stable cultivar that maintains the unusual narrow shape while preserving adequate growth vigor.
2Area of stationary object
If selective breeding is applied to achieve narrow form, then tree width is reduced, but breeding time and selection complexity increase
Solution Approach 1:
The patent applies preliminary action by conducting extensive field evaluation over multiple years (1997-2005) to identify and select the exceptional narrow-form mutant 'JFS-KW78' from among 162 seedlings. This preliminary selection phase allowed the breeder to identify the unique individual with naturally occurring narrow columnar growth before applying asexual propagation methods. By pre-selecting the ideal genotype through long-term observation and measurement, the subsequent propagation process was streamlined, avoiding the need for repeated selection cycles.
Solution Approach 2:
The patent applies copying by using asexual propagation methods to create identical replicas of the selected mutant tree 'JFS-KW78'. Through chip budding on Acer rubrum rootstock, softwood cuttings, and micropropagation, the breeder produced multiple genetically identical copies of the narrow-form tree. This copying process efficiently multiplied the desired narrow phenotype without requiring additional selection time, as all propagated plants inherit the exact same narrow growth characteristics from the parent.
3Adaptability or versatility
If existing cultivars are used, then commercial availability is maintained, but unique combination of narrow form, small leaves, and bright fall color is not achieved
Solution Approach 1:
The patent applies local quality by emphasizing specific localized characteristics of the 'JFS-KW78' cultivar that distinguish it from general Acer rubrum forms. The cultivar exhibits tightly upright fastigiate branching with a narrow columnar shape, small leaves with long acuminate tips, and bright fall color - a unique combination of local qualities not found together in existing cultivars. These specific local characteristics make the cultivar particularly suited for landscape applications where narrow form and ornamental features are desired, while the asexual propagation ensures these local qualities remain consistent across all plants.
Data Source
AI summary
A new variety of red maple with a unique combination of characteristics, combining a tightly fastigiate branching habit, an extremely narrow to columnar form, small leaves with long acuminate tips that produce a delicate appearance, and bright fall color.