Hydrangea Cultivar SCHROLL85-09-02 Stem Strength and Flowering Response
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Solution Overview
Problem
Existing Hydrangea macrophylla cultivars lack strong stems, early flowering response, and attractive leaf and flower coloration, as well as adequate tolerance to pathogens and pests, which limits their performance in container-type plant breeding programs.
Innovation Solution
The development of the new Hydrangea cultivar 'SCHROLL85-09-02' with a compact, upright growth habit, freely branching stems, dark green leaves, large mophead-type inflorescences with red-purple sterile flowers that change to purple when 'blued', and enhanced resistance to pathogens and pests, achieved through asexual reproduction by softwood cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If existing Hydrangea macrophylla cultivars are used, then they can be grown in container-type breeding programs, but they lack strong stems, early flowering response, and attractive leaf and flower coloration
Solution Approach 1:
The patent applies parameter changes by selecting and propagating a mutant plant with altered genetic parameters that result in stronger stems, earlier flowering response, and improved coloration. The asexual reproduction through softwood cuttings maintains these improved parameters across generations, resolving the contradiction between stem strength and flowering reliability.
Solution Approach 2:
The patent uses asexual reproduction by softwood cuttings to create exact copies of the mutant plant's superior traits. This copying mechanism ensures that the strong stems, early flowering response, and attractive coloration are reliably reproduced in successive generations, eliminating the unreliability of traditional cultivars.
2Reliability
If existing Hydrangea macrophylla cultivars are used, then they can be propagated, but they lack adequate tolerance to pathogens and pests
Solution Approach 1:
The mutant plant exhibits changed parameters including enhanced pathogen and pest tolerance. This genetic parameter change allows the plant to maintain better health and productivity in breeding programs, resolving the contradiction between reliability of tolerance and overall breeding performance.
3Shape
If the new cultivar 'SCHROLL85-09-02' is developed with compact growth habit and strong stems, then it achieves early flowering response and attractive coloration, but it requires controlled greenhouse environment for discovery and selection
Solution Approach 1:
The patent uses asexual reproduction to copy the desirable compact shape and other traits of the mutant plant. This copying method simplifies the breeding process by eliminating the need for complex hybridization programs, resolving the contradiction between achieving desirable plant habit and maintaining breeding program simplicity.
Data Source
AI summary
A new and distinct cultivar of Hydrangea plant named ‘SCHROLL85-09-02’, characterized by its compact, upright and mounded plant habit; moderately vigorous growth habit; freely branching habit and strong stems; dark green-colored leaves; large mophead-type inflorescences with red purple-colored sterile flowers; when “blued”, that is, treated with aluminum sulfate, sterile flowers are purple in color; long flowering period; and good postproduction quality and longevity.