Spiraea Cultivar SMSJMLA Radiation Breeding Compact Habit
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Solution Overview
Problem
Existing Spiraea japonica varieties lack compact and full growth habits with desirable flower and leaf colors, and there is a need for new cultivars that exhibit stable, unique characteristics across generations.
Innovation Solution
The development of the Spiraea cultivar 'SMSJMLA' through planned breeding and radiation treatment of seedlings, resulting in a compact, dark green foliage with dark pink flowers and wide, flat corymbs, which is propagated via softwood cuttings and maintains its unique features across generations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional Spiraea japonica varieties are used, then they have established horticultural characteristics, but they lack compact and full growth habits with desirable flower and leaf colors
Solution Approach 1:
The patent applies parameter changes by subjecting Spiraea japonica seedlings to radiation treatment (10 grays) to induce genetic mutations, thereby creating new variations in growth habit, foliage color, and flower color that differ from the parent varieties. This resulted in the compact, dwarf habit and dark green foliage of cultivar 'SMSJMLA'
Solution Approach 2:
The patent converts the potentially harmful effect of radiation into a beneficial outcome by using controlled radiation treatment to induce desirable mutations. The radiation, which could damage or kill plants, instead produced the sought-after compact growth habit and enhanced color characteristics in the mutant seedlings
2Reliability
If new cultivars are developed through breeding and mutation, then unique characteristics are achieved, but stability across generations must be ensured
Solution Approach 1:
The patent applies preliminary action by performing radiation treatment on M1 generation seedlings before they flower and set seed. This allows the selection of mutant plants with desired traits to be propagated through controlled crossing programs, ensuring that the unique characteristics are established and stabilized before widespread propagation via softwood cuttings
Solution Approach 2:
The patent employs feedback mechanisms by carefully selecting M2 generation plants based on their foliage color, flower color, and growth habit, then using these selected plants for further propagation. The continuous observation and selection process ensures that only plants with stable, desirable traits are propagated, maintaining reliability across generations
Data Source
AI summary
A new and distinct Spiraea cultivar named ‘SMSJMLA’ is disclosed, characterized by a uniquely dwarf, dense plant habit, dark foliage and dark pink flowers. Plants have a strong flowering habit. The new variety is a Spiraea, normally produced as an outdoor garden or container plant.