Hydrangea macrophylla Fantasy Cultivar Stable Trait Propagation
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Solution Overview
Problem
Current cultivars of Hydrangea macrophylla lack a stable, asexually reproducible variety with desirable growth characteristics and lightly pigmented sepals, which limits their genetic diversity and adaptability in horticultural applications.
Innovation Solution
A new cultivar, Hydrangea macrophylla 'Fantasy', is developed through controlled crossing, characterized by its compact growth habit, large inflorescences, and lightly pigmented sepals, which has been successfully asexually reproduced and maintained through three generations, showcasing stable desirable traits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If controlled crossing is used to develop new cultivars, then genetic diversity and desirable growth characteristics are improved, but stability of traits through asexual reproduction is worsened
Solution Approach 1:
The patent applies vegetative propagation (asexual reproduction) to create exact genetic copies of the selected Hydrangea macrophylla plant. This copying process ensures that the desirable traits from the controlled cross are stably transmitted to successive generations without genetic variation, resolving the contradiction between genetic diversity and trait stability.
2Stability of the object's composition
If vegetative propagation is used for reproduction, then trait stability is improved, but genetic diversity is worsened
Solution Approach 1:
The patent performs controlled crossing and selects desirable traits before asexual reproduction. By preliminarily establishing the desired genetic composition through controlled cross-pollination and selection, the subsequent vegetative propagation can stably copy these pre-determined traits, ensuring both trait stability and genetic diversity at the cultivar level.
3Ease of manufacture
If new cultivars with unique traits are developed, then horticultural value is improved, but ease of reproduction is worsened
Solution Approach 1:
The patent uses vegetative propagation to create identical copies of the selected Hydrangea plant, ensuring that the unique horticultural traits are reliably reproduced. This copying method maintains both the ease of reproduction through simple cutting propagation and the reliability of trait consistency across generations.
Data Source
AI summary
A new and distinct cultivar of Hydrangea macrophylla (Thunb.) named ‘Fantasy’ originated as a controlled cross. The cultivar ‘Fantasy’ can be blue or pink depending on the acidity of the soil and is desirable for its compact and sturdy growth habit. ‘Fantasy’ has large showy inflorescences, having both sepalous and non-sepalous florets.