Sedum sexangulare Yellowstone cultivar foliage traits
Solution Overview
Problem
The existing Sedum sexangulare cultivars lack larger foliage and vibrant golden yellow foliage color in early summer, which are desirable traits for horticultural interest.
Innovation Solution
A new Sedum sexangulare cultivar named 'Yellowstone' is developed through open pollination of 'Golddigger', characterized by larger golden yellow foliage, achieved via vegetative propagation methods such as division and cuttings, resulting in a stable and unique phenotype.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If open pollination of Sedum sexangulare 'Golddigger' is performed to develop new cultivars, then foliage size and color variation are improved, but breeding time and complexity increase
Solution Approach 1:
The patent performs preliminary open pollination of Sedum sexangulare 'Golddigger' to generate genetic variation before selection, allowing the desired foliage traits to be established in the population before the specific 'Yellowstone' cultivar is identified and propagated. This preliminary genetic preparation reduces subsequent breeding time.
2Stability of the object's composition
If vegetative propagation methods such as division and cuttings are used, then reproduction stability is improved, but propagation complexity increases
Solution Approach 1:
The patent employs division and cutting propagation methods that allow the plant to reproduce itself vegetatively without requiring complex external intervention. The plant material itself serves as the propagation medium, simplifying the overall process while ensuring genetic stability and reproduction fidelity of the 'Yellowstone' cultivar.
3Shape
If selection is made for larger foliage and golden yellow color, then aesthetic appeal is improved, but selection criteria complexity increases
Solution Approach 1:
The patent applies local quality selection by focusing on specific, localized traits - namely foliage size and golden yellow coloration - rather than evaluating all plant characteristics. This targeted approach to selection simplifies the breeding program while achieving the desired aesthetic improvements in the 'Yellowstone' cultivar.
Solution Approach 2:
The patent specifically selects for golden yellow foliage color (RHS color 1B and C) as a distinctive trait of the 'Yellowstone' cultivar. This color selection provides a clear, visually detectable criterion that simplifies the identification and selection process while significantly enhancing the plant's aesthetic appeal.
4Adaptability or versatility
If open pollination is performed to create genetic variation, then foliage color diversity is improved, but breeding reliability decreases
Solution Approach 1:
The patent performs preliminary open pollination to generate genetic diversity and color variation in the population before selection. This preliminary genetic preparation creates a diverse pool from which the specific golden yellow 'Yellowstone' cultivar can be reliably selected and propagated, thus maintaining both diversity and eventual breeding reliability.
Solution Approach 2:
The patent uses self-service propagation through division and cuttings once the desired golden yellow phenotype is identified. This vegetative propagation method ensures that the selected 'Yellowstone' cultivar reproduces true-to-type with high reliability, maintaining the desired foliage color diversity while ensuring consistent reproduction of the selected traits.
Data Source
AI summary
A new, distinct Sedum sexangulare plant as illustrated and described, characterized by larger foliage and golden yellow foliage color in early summer, compared to the smaller chartreuse foliage in early summer of the parent plant.