Hydrangea HIVAL Cultivar Stem Strength and Longevity
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Solution Overview
Problem
Current Hydrangea macrophylla cultivars lack sturdy stems and optimal post-production longevity, which affects their durability and flowering performance under varying environmental conditions.
Innovation Solution
The development of a new Hydrangea macrophylla cultivar, 'HIVAL', resulting from a cross-pollination between proprietary selections 1340 and 1693, exhibiting upright and spreading growth, strong stems, dense white inflorescences, and prolonged flowering longevity, achieved through asexual reproduction by terminal vegetative cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional Hydrangea macrophylla cultivars are used, then flowering performance is maintained, but stem strength is insufficient
Solution Approach 1:
The patent applies parameter changes by selecting and propagating plants with specific genetic parameters that encode for both strong stems and reliable flowering performance. The breeding program identified and fixed particular genetic parameters in the new cultivar that simultaneously provide structural strength and reproductive reliability, resolving the contradiction between these two traits.
Solution Approach 2:
The new cultivar can be considered a composite genetic material resulting from cross-pollination between selections 1340 and 1693. This composite genetics combines the advantageous traits of both parents, producing a plant with both strong stems (from one parent) and reliable flowering performance (from the other parent), thus resolving the technical contradiction.
2Duration of action of stationary object
If conventional Hydrangea macrophylla cultivars are used, then growth characteristics are maintained, but post-production longevity is insufficient
Solution Approach 1:
The breeding program changed key genetic parameters related to plant longevity and growth patterns. By selecting plants with specific parameter combinations that encode for extended post-production longevity while maintaining acceptable growth characteristics, the patent resolved the contradiction between duration and productivity.
Solution Approach 2:
The patent applied preliminary action through selective breeding before production. By pre-selecting and fixing the genetic parameters for longevity during the breeding program, the new cultivar was prepared in advance to exhibit extended post-production longevity while maintaining suitable growth characteristics, thus resolving the contradiction between these opposing requirements.
3Productivity
If proprietary selection 1340 is used as female parent, then flowering habit is improved, but stem strength is reduced
Solution Approach 1:
The patent used composite materials in the form of a cross-pollinated cultivar combining selection 1340 (female parent with good flowering habit) and selection 1693 (male parent with strong stems). This composite genetics allows the new cultivar to inherit the flowering habit from the female parent while obtaining stem strength from the male parent, resolving the contradiction between these two traits.
Solution Approach 2:
The patent applied local quality by allowing different parts of the plant to have different genetic origins optimized for their specific functions. The flowering structures (inflorescences) inherit qualities from selection 1340 for optimal flowering habit, while the stem structures inherit qualities from selection 1693 for enhanced strength, thus resolving the contradiction through functional specialization.
4Strength
If proprietary selection 1693 is used as male parent, then stem strength is improved, but branching habit is reduced
Solution Approach 1:
The patent employed composite materials through cross-pollination between selections 1340 and 1693, creating a new cultivar with composite genetics. This composite structure allows the plant to exhibit strong stems (from male parent 1693) combined with freely branching habit (inherited from female parent 1340), thus resolving the contradiction between stem strength and branching habit.
Solution Approach 2:
The patent applied local quality by assigning different genetic qualities to different plant parts based on parental inheritance. The stem structures receive genetic input from selection 1693 for enhanced strength, while the branching structures receive genetic input from selection 1340 for optimal branching habit, allowing each part to have optimized local qualities that together resolve the contradiction.
Data Source
AI summary
A new and distinct cultivar of Hydrangea plant named ‘HIVAL’, characterized by its upright and broadly spreading plant habit; moderately vigorous and moderate growth rate; freely branching habit; strong and sturdy stems; dark green-colored leaves; freely flowering habit; large and dense inflorescences with white-colored sterile flowers; and good post-production longevity.