Hydrangea H218923 Cultivar Breeding for Uniform Flowering and Longevity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing Hydrangea cultivars lack strong and freely-branching plants with uniform flowering habits, large inflorescences, and attractive sterile flower colors that also exhibit good post-production longevity.
Innovation Solution
A new cultivar, Hydrangea macrophylla 'H218923', resulting from a cross-pollination between Hydrangea macrophylla 'Saxdifioros' and 'Preziosa', characterized by upright and mounded growth, vigorous branching, mophead-type inflorescences with white to very light red-purple sterile flowers, and extended flower longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conventional Hydrangea cultivars are used, then basic flowering is achieved, but strong and free branching with uniform flowering habit is not obtained
Solution Approach 1:
The invention segments the breeding objective into specific parental contributions: the female parent provides the flowering habit and inflorescence characteristics, while the male parent contributes to stem strength and branching architecture. This segmentation of parental traits allows the hybrid to achieve both free branching and uniform flowering simultaneously.
Solution Approach 2:
The invention changes the genetic parameters through controlled cross-pollination, specifically altering the branching parameter (from restrained to free) and flowering uniformity parameter (from variable to uniform) by combining specific parental genotypes that complement each other's strengths.
2Volume of moving object
If conventional Hydrangea cultivars are used, then flowering is achieved, but large inflorescences with numerous showy sterile flowers are not obtained
Solution Approach 1:
The invention merges the inflorescence size genes from the female parent with the fertility suppression genes from the male parent, creating a hybrid that produces large inflorescences filled with showy sterile flowers. This combination merges two distinct parental traits that were previously separate in different cultivars.
Solution Approach 2:
The sterile flowers serve multiple functions: they provide the visual display function (showy appearance), fill the inflorescence volume function (large size), and maintain the structural integrity function (numerous individual flowers). This multi-functionality is achieved through the hybrid's unique genetic composition.
3Duration of action of stationary object
If conventional Hydrangea cultivars are used, then basic flower production is achieved, but attractive sterile flower color and good postproduction longevity are not obtained
Solution Approach 1:
The invention performs preliminary genetic action during the breeding phase by selecting parents with complementary traits for both color and longevity. The female parent contributes the longevity trait while the male parent contributes to color stability, so that the hybrid is pre-equipped with both attributes before commercial production begins.
Solution Approach 2:
The flower's attractive color and extended longevity form a composite quality package, where the genetic material from both parents combines to create a flower that simultaneously achieves color attractiveness (from male parent influence) and postproduction longevity (from female parent influence), neither of which could be achieved with a single parent alone.
Data Source
AI summary
A new and distinct cultivar of Hydrangea plant named ‘H218923’, characterized by its upright and uniformly mounded plant habit; 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 white to very light red purple-colored sterile flowers; and good postproduction longevity.