Hydrangea H223901 Cultivar Breeding for Uniform Branching and Flower Longevity
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Solution Overview
Problem
Current Hydrangea macrophylla cultivars lack strong, uniformly branching plants with large, long-lasting purplish red sterile flowers and stable asexual reproduction traits under varying environmental conditions.
Innovation Solution
A new cultivar 'H223901' of Hydrangea macrophylla with compact, upright growth, strong stems, and freely branching habit, producing mophead-type inflorescences with numerous purplish red sterile flowers, achieved through controlled breeding and asexual reproduction by vegetative tip cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional Hydrangea macrophylla cultivars are used, then basic flowering function is maintained, but strong uniformly branching plants with large long-lasting purplish red sterile flowers and stable asexual reproduction traits are not achieved
Solution Approach 1:
The patent applies parameter changes by selecting and stabilizing specific phenotypic parameters (purplish red sterile flower color, compact upright growth habit, strong stems) through controlled breeding. The cultivar was developed by changing environmental parameters during selection (controlled greenhouse environment) and maintaining stable genetic parameters through asexual reproduction by vegetative tip cuttings, achieving both reliability and adaptability.
2Productivity
If plant growth is made more vigorous, then rapid growth rate is achieved, but uniform mounding and free branching habit are compromised
Solution Approach 1:
The patent applies local quality by developing a cultivar with differentiated growth characteristics - the overall plant exhibits vigorous growth rate while specific local areas (stem structure, branching points) display uniform mounding and free branching habits. This localized optimization of growth properties allows simultaneous achievement of productivity and aesthetic form.
3Quantity of substance
If inflorescence size is increased, then numerous sterile flowers are produced, but flower longevity is reduced
Solution Approach 1:
The patent applies preliminary action by developing the inflorescence structure and flower quality during the growth and development phase before full bloom. The cultivar was selected and bred to establish strong stem structures and proper inflorescence formation early, which then supports both high flower quantity and extended longevity during the flowering and postproduction periods through predetermined structural integrity.
Data Source
AI summary
A new and distinct cultivar of Hydrangea plant named ‘H223901’, characterized by its relatively compact, upright and uniformly mounded plant habit; moderately vigorous growth habit and rapid growth rate; freely branching habit with strong, thick and sturdy stems; freely and uniformly flowering habit; mophead-type inflorescences with numerous sterile flowers that are purplish red in color; and good postproduction longevity.