Hydrangea HorAbstra Breeding for Unique Black Stems and Dark Pink Flowers
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Solution Overview
Problem
There is a need for new Hydrangea macrophylla cultivars with attractive foliage, stem, and flower coloration that are more vigorous and distinct from existing varieties, offering unique characteristics such as black stems and dark pink flowers.
Innovation Solution
The development of the 'HorAbstra' cultivar, resulting from a cross-pollination between proprietary selections of Hydrangea macrophylla, which exhibits an upright and mounded habit, black stems, strong dark green leaves, and large lacecap-type inflorescences with dark pink flowers, distinguishing it from parent selections and other varieties like 'Nigra'.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-pollination breeding is conducted to develop new Hydrangea cultivars with unique characteristics, then novel traits such as black stems and dark pink flowers are achieved, but the breeding process requires significant time and resources
Solution Approach 1:
The patent applies preliminary action by conducting multiple generations of selective breeding and backcrossing before the final cultivar is established. The breeder performed systematic crosses between parent plants with desired traits (black stems, dark pink flowers) and repeatedly selected and propagated offspring showing the target characteristics, thereby preparing the genetic foundation in advance to achieve the unique 'HorAbstra' cultivar with stable inheritance of novel traits
2Manufacturing precision
If selective breeding is performed to achieve specific flower and stem coloration, then distinctive cultivar characteristics are obtained, but the complexity of the breeding program increases
Solution Approach 1:
The patent applies local quality by focusing breeding efforts on specific targeted traits rather than attempting to optimize all plant characteristics simultaneously. The breeder concentrated selection pressure on stem color (black pigmentation) and flower color (dark pink sepals), while accepting variability in other traits, thereby achieving precise coloration control without requiring overly complex multi-trait selection programs
3Stability of the object's composition
If asexual reproduction is used to propagate the new cultivar, then genetic stability and true-to-type reproduction are achieved, but the propagation process requires controlled environmental conditions
Solution Approach 1:
The patent applies copying by using asexual propagation methods (cuttings) to reproduce the 'HorAbstra' cultivar. This creates genetic copies of the parent plant that inherit the unique black stem and dark pink flower traits without genetic variation, ensuring true-to-type reproduction and genetic stability while avoiding the need for complex controlled pollination processes in commercial propagation
Data Source
AI summary
A new and distinct cultivar of Hydrangea plant named ‘HorAbstra’, characterized by its upright and mounded plant habit; black-colored stems; strong and dark green-colored leaves; and large lacecap-type inflorescences with dark pink-colored flowers.