Compact Hydrangea RENSAM Breeding for Cold Hardiness
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Solution Overview
Problem
There is a need for new Hydrangea paniculata varieties with compact growth habits, abundant inflorescences, and cold hardiness suitable for garden use, as existing varieties may not meet specific horticultural requirements such as compactness and consistent blooming across varying environmental conditions.
Innovation Solution
The cultivar 'RENSAM' is developed through planned breeding, characterized by a compact plant habit, abundant pyramidal inflorescences, cold hardiness to USDA Zone 4, and continuous blooming from July to October, with flowers transitioning from white to deep pink, achieved through asexual reproduction by softwood cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If existing Hydrangea paniculata varieties are used, then they may produce larger inflorescences, but they lack compact growth habits and consistent blooming across varying environmental conditions
Solution Approach 1:
The patent applies parameter changes by selectively breeding plants with specific genetic parameters that control growth habit compactness while maintaining inflorescence production. The cultivar 'RENSAM' exhibits a compact growth habit with dense branching patterns, achieved through controlled variation in plant architecture parameters during the breeding process, resolving the contradiction between compactness and flowering performance.
2Reliability
If existing Hydrangea paniculata varieties are used, then they may bloom under certain conditions, but they lack cold hardiness suitable for garden use in colder zones
Solution Approach 1:
The patent applies preliminary action through pre-breeding selection for cold hardiness traits before introducing plants to varying environmental conditions. The cultivar 'RENSAM' was developed with inherent cold hardiness characteristics through selective breeding, allowing it to reliably withstand USDA Zone 4 winter conditions while maintaining blooming consistency across different garden environments.
3Stability of the object's composition
If existing Hydrangea paniculata varieties are used, then they may produce variable bloom colors, but they lack consistent deep pink coloration across multiple generations
Solution Approach 1:
The patent applies parameter changes by selectively breeding for specific pigment composition parameters that produce consistent deep pink coloration. The cultivar 'RENSAM' exhibits stable anthocyanin pigment production resulting in reliable deep pink flowers that maintain color consistency across generations and varying environmental conditions, resolving the contradiction between color stability and intensity.
Data Source
AI summary
A new and distinct cultivar of Hydrangea plant named ‘RENSAM’ is disclosed, characterized by abundant pyramidal inflorescences on compact plants. Flowers begin white and turn deep pink with maturity. The new variety is a Hydrangea, normally produced as an ornamental plant for containers or gardens.