Phlox Cultivar 'Ditomdre' Breeding for Downy Mildew Tolerance
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Solution Overview
Problem
Existing Phlox paniculata cultivars lack compact growth, attractive leaf and flower coloration, and disease resistance, particularly susceptibility to Downy Mildew.
Innovation Solution
A new cultivar 'Ditomdre' with an upright and strong habit, freely branching and flowering, dark-colored stems and leaves, light red flowers, and tolerance to Downy Mildew, achieved through controlled cross-pollination and asexual reproduction by cuttings in a breeding program.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional Phlox paniculata cultivars are used, then they can be grown easily, but they lack compact growth and attractive coloration
Solution Approach 1:
The patent applies preliminary action by conducting planned breeding programs and controlled cross-pollinations in advance to develop cultivars with desired compact growth habits and attractive coloration before commercial propagation. The asexual reproduction by cuttings preserves these pre-developed characteristics稳定ly.
2Reliability
If existing Phlox cultivars are used, then they can be propagated readily, but they show susceptibility to Downy Mildew
Solution Approach 1:
The patent applies feedback by systematically evaluating progeny for Downy Mildew resistance through controlled inoculation tests and selecting only those plants that exhibit tolerance. This feedback loop ensures that disease resistance is integrated into the cultivar development process while maintaining manageable breeding program complexity.
3Ease of manufacture
If conventional Phlox cultivars are used, then they maintain standard growth habits, but they lack attractive leaf and flower coloration
Solution Approach 1:
The patent applies local quality by selecting and propagating plants with specific desirable coloration traits in leaves and flowers while maintaining overall plant health and propagation ease. The asexual reproduction by cuttings ensures these local quality characteristics are preserved true-to-type in successive generations.
4Shape
If new cultivar 'Ditomdre' is developed, then it exhibits compact growth and disease resistance, but it requires controlled breeding program
Solution Approach 1:
The patent applies preliminary action by completing the complex breeding program and selecting the superior 'Ditomdre' cultivar in advance. Once developed, this cultivar can be propagated asexually by cuttings, which is simpler and maintains the compact habit without requiring repeated complex breeding operations.
Data Source
AI summary
A new and distinct cultivar of Phlox plant named ‘Ditomdre’, characterized by its upright and strong plant habit; freely branching and flowering habit; dark-colored stems and leaves; light red-colored flowers; and tolerance to Downy Mildew.