Hydrangea Hortmacaro Cultivar Breeding for Dark Red-Purple Flowers
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Solution Overview
Problem
There is a need for new Hydrangea macrophylla cultivars with large inflorescences featuring dark red-purple colored sterile flowers and improved post-production longevity, as existing varieties may lack these specific traits or exhibit variations in environmental conditions.
Innovation Solution
The development of the 'Hortmacaro' Hydrangea cultivar, resulting from a cross-pollination between proprietary selections of Hydrangea macrophylla, which exhibits an upright and spreading habit, moderate branching, strong stems, and large mophead-type inflorescences with dark red-purple sterile flowers, along with good post-production longevity, achieved through asexual reproduction by vegetative terminal cuttings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If existing Hydrangea varieties are used, then basic flowering characteristics are maintained, but large inflorescences with dark red-purple sterile flowers and improved postproduction longevity are not achieved
Solution Approach 1:
The patent applies parameter changes by selectively breeding for specific phenotypic traits including dark red-purple flower color, large inflorescence size, and extended postproduction longevity. The breeding program modified genetic parameters to achieve sterile flowers with sepals 2.5-4.0 cm in length and maintained these traits through asexual reproduction, ensuring both improved longevity and trait consistency.
Solution Approach 2:
The patent employs preliminary action through a systematic breeding program conducted before commercial release. The inventor performed controlled cross-pollinations, selected superior progeny based on desired traits, and established stability through multiple generations of asexual reproduction. This preliminary breeding and selection process ensured that the cultivar 'Hortmacaro' would consistently exhibit the target characteristics of dark red-purple color, large inflorescences, and extended postproduction longevity.
2Shape
If proprietary selections are cross-pollinated to create new traits, then large inflorescences with dark red-purple flowers are achieved, but breeding program complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the breeding program into distinct phases: controlled cross-pollination of specific parental selections, progeny evaluation for target traits, selection of superior individuals, and stability verification through asexual reproduction. This segmented approach to breeding allowed systematic development of large inflorescences with dark red-purple flowers while managing program complexity through structured methodology.
Solution Approach 2:
The patent uses an intermediary approach by employing controlled cross-pollination as a mediator between parental selections and progeny. The breeding program utilized intermediate selection stages where progeny were evaluated for specific traits (inflorescence size, flower color) before final cultivar establishment. This intermediary selection process facilitated the achievement of desired inflorescence characteristics while simplifying the overall breeding complexity through staged evaluation.
Data Source
AI summary
A new and distinct cultivar of Hydrangea plant named ‘Hortmacaro’, characterized by its upright and spreading plant habit; moderately vigorous to vigorous growth habit and moderate growth rate; moderate branching habit with strong and thick sturdy stems; large mophead-type inflorescences with dark red purple-colored sterile flowers; and good postproduction longevity.