Cornus florida Cultivar Bract Color Stability and Mildew Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current dogwood tree cultivars lack a stable, true-to-type variety with both fully dark red and lighter red bracts, and are susceptible to powdery mildew, which affects their durability and aesthetic appeal.
Innovation Solution
The development of the 'Erica's Appalachian Sunrise' dogwood tree cultivar, resulting from self-pollination of 'Cherokee Brave', which produces significantly smaller bracts in both dark red and lighter red colors, and exhibits enhanced resistance to powdery mildew, maintaining its unique features through asexual reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If self-pollination of 'Cherokee Brave' is performed to stabilize bract color variation, then bract color stability is improved, but breeding time and complexity increase
Solution Approach 1:
The patent performs self-pollination breeding in advance to establish a stable cultivar with consistent bract coloration before commercial propagation. By conducting the breeding process beforehand and selecting for stable color inheritance, the cultivar is prepared in advance to reliably produce uniform bract colors in production, avoiding the need for ongoing breeding efforts.
2Reliability
If powdery mildew resistance is enhanced through breeding, then disease resistance is improved, but genetic diversity may be reduced
Solution Approach 1:
The patent utilizes self-pollination, where the plant fertilizes itself, to develop disease-resistant cultivars. This self-service breeding approach allows the cultivar to maintain and stabilize desirable traits including powdery mildew resistance through repeated selfing generations, while the selected resistance traits become fixed in the lineage.
3Stability of the object's composition
If bract size is reduced to create more uniform appearance, then aesthetic uniformity is improved, but visual impact may be diminished
Solution Approach 1:
The patent selects for and stabilizes a specific bract size parameter that achieves optimal uniformity while maintaining sufficient visual impact. By changing and fixing the size parameter through breeding selection, the cultivar produces bracts that are consistently sized and colored, creating a uniform appearance that retains aesthetic appeal through reliable trait expression rather than extreme size reduction.
Data Source
AI summary
A new and distinct cultivar of flowering dogwood tree, which produces both fully dark red bracts and lighter red to pink bracts is provided. This dogwood tree is botanically known as Cornus florida and referred to by the following cultivar name: ‘Erica's Appalachian Sunrise’.