Hydrangea SMHALP Cultivar Breeding for Upright Habit and Lacecap Flowers
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Solution Overview
Problem
There is a need for new Hydrangea varieties with good plant habit and showy flowers that can reproduce true to type and exhibit unique characteristics such as upright plant form, attractive lacecap inflorescences, and strong stems, which existing varieties fail to consistently provide.
Innovation Solution
The cultivar 'SMHALP' is developed through open-pollination and subsequent asexual reproduction by vegetative softwood cuttings, showcasing a stable and distinct combination of traits including upright plant form, pink fertile flowers, and light pink sepals, which differ from similar varieties like Hydrangea 'Haas Halo'.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If open-pollination is used to create new Hydrangea varieties, then genetic diversity and new trait combinations are achieved, but the ability to reproduce true to type is compromised
Solution Approach 1:
The breeding program is divided into two distinct phases: an open-pollination phase to generate genetic diversity and novel trait combinations, followed by a clonal propagation phase to preserve and reproduce the selected varieties true-to-type. This segmentation allows each phase to optimize for its specific goal without compromising the other.
Solution Approach 2:
The patent employs clonal propagation methods (such as softwood cuttings) to create genetic copies of the selected Hydrangea varieties. This copying process ensures that the desirable traits developed during open-pollination can be reproduced consistently and true-to-type in subsequent generations, resolving the contradiction between genetic diversity and繁殖 fidelity.
2Reliability
If vegetative softwood cuttings are used for asexual reproduction, then true-to-type reproduction is achieved, but the time required for propagation is extended
Solution Approach 1:
The patent performs preliminary actions by collecting and storing seeds from open-pollination events before the selected varieties are fully established. This allows the propagation process to begin sooner, reducing the overall time required. The seeds are prepared and stored in advance, enabling rapid germination and plant production when needed.
Solution Approach 2:
The breeding program maintains continuous useful action by continuously collecting seeds from open-pollination events and continuously propagating selected varieties through clonal methods. This continuous cycle of seed collection, selection, and propagation reduces idle time and accelerates the overall development and deployment of new varieties.
3Adaptability or versatility
If environmental variations occur, then phenotypic expression may change, but the genotype remains stable
Solution Approach 1:
By using clonal propagation to create genetic copies of the parent plants, the patent ensures that the genotype remains stable and consistent across generations. This copying process preserves the genetic blueprint that determines the plant's response to environmental variations, allowing for predictable phenotypic expression while maintaining genetic fidelity.
Solution Approach 2:
The patent acknowledges and accounts for parameter changes in environmental conditions (temperature, day length, light intensity) that affect phenotypic expression. By understanding these environmental parameters and their effects, the breeding program can select and propagate varieties that exhibit desirable phenotypes under target growing conditions, managing the relationship between environmental variability and phenotypic consistency.
Data Source
AI summary
A new and distinct cultivar of Hydrangea plant named ‘SMHALP’ is disclosed, characterized by attractive flowers arranged in a lacecap inflorescence on plants with strong stems and a good upright habit. The new variety is a Hydrangea, normally produced as an ornamental plant.