Hydrangea HIOCE Botrytis Resistance and Stem Strength
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Solution Overview
Problem
Current Hydrangea macrophylla cultivars lack sturdy stems and resistance to Botrytis, and existing varieties do not consistently exhibit desirable traits across varying environmental conditions.
Innovation Solution
A new cultivar, 'HIOCE', resulting from a cross-pollination between proprietary selections of Hydrangea macrophylla, exhibits upright and spreading growth, strong stems, dense purplish-red inflorescences, and improved resistance to Botrytis, with stable reproduction through terminal vegetative cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional Hydrangea macrophylla cultivars are used, then they can be grown under various environmental conditions, but they lack sturdy stems and resistance to Botrytis
Solution Approach 1:
The patent combines desirable traits from two different parent plants through controlled cross-pollination. The female parent (code 1563) contributed Botrytis resistance while the male parent (code 1671) contributed sturdy stem characteristics. The resulting cultivar 'HIOCE' integrates both traits into a single plant, resolving the contradiction between disease resistance and structural strength.
Solution Approach 2:
The breeding program systematically varied genetic parameters through multiple generations of selection and cross-pollination. By selecting specific parental lines with complementary traits and controlling the cross-pollination process, the patent achieved optimal combination of Botrytis resistance and stem strength that neither parent possessed individually.
2Stability of the object's composition
If existing Hydrangea varieties are selected, then they can be propagated, but they do not consistently exhibit desirable traits across varying environmental conditions
Solution Approach 1:
The breeding program implemented systematic evaluation and selection based on performance feedback from controlled trials. Multiple generations of plants were assessed under varying environmental conditions, and only those exhibiting consistent desirable traits were selected for further propagation. This feedback-driven selection process ensured trait stability while maintaining environmental adaptability.
Solution Approach 2:
The patent performed preliminary controlled cross-pollination and selection in a controlled environment before commercial propagation. By pre-selecting and pre-testing the cultivar under various conditions, the breeding program ensured that only genetically stable and environmentally adaptable plants were propagated, preventing inconsistent trait expression in commercial production.
3Productivity
If vigorous growth is selected for, then the plant produces more biomass, but the stems become less resistant to Botrytis
Solution Approach 1:
The patent applied local quality by selecting for vigorous growth in specific plant parts (overall plant size and foliage) while maintaining disease resistance in critical structures (stems and flowering branches). The female parent contributed Botrytis resistance to the stem tissue, while the male parent contributed growth vigor, creating a plant with differentiated quality characteristics in different parts.
Data Source
AI summary
A new and distinct cultivar of Hydrangea plant named ‘HIOCE’, characterized by its upright and broadly spreading plant habit; moderately vigorous growth habit and moderate growth rate; freely branching habit; strong and sturdy stems; dark green-colored leaves; freely flowering habit; large and dense inflorescences with purplish red-colored sterile flowers; and good post-production longevity.