Sedum Dolseb Cultivar Breeding for Upright Stems and Mildew Resistance

Solution Overview

Problem

There is a need for a new cultivar of Sedum that exhibits unique characteristics such as upright stems, dark burgundy foliage, well-branched growth habit, resistance to mildew, and specific flowering traits, which are not adequately met by existing Sedum cultivars like 'Night Embers', 'Dark Magic', and 'Touchdown Teak'.

Innovation Solution

The development of Sedum 'Dolseb', a hardy herbaceous perennial with narrow leaves, dark burgundy foliage, well-branched growth, resistance to mildew, and red-pink flowers, propagated through stem cuttings, which distinguishes it from other Sedum cultivars.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If existing Sedum cultivars like 'Night Embers', 'Dark Magic', and 'Touchdown Teak' are used, then dark colored foliage is achieved, but they lack unique combination of upright stems, well-branched growth habit, and disease resistance

Engineering Contradiction:
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent segments the desirable traits into distinct categories (stem architecture, branching pattern, disease resistance, foliage color) and selects for each independently in the breeding program, combining them in the new cultivar 'Dolseb' which exhibits all these segmented traits simultaneously

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The new cultivar 'Dolseb' is bred to perform multiple functions simultaneously: it provides ornamental value through dark burgundy foliage and well-branched growth, structural value through upright stems suitable for containers, and functional value through mildew resistance, making it a universal solution for landscape and container applications

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Shape

If Sedum cultivars are selected for dark colored foliage, then aesthetic appeal is improved, but they often lack upright stem structure suitable for large containers

Engineering Contradiction:
Core Design Contradiction:
ShapeVSEase of operation

Solution Approach 1:

The patent applies local quality by selecting for specific stem characteristics (upright orientation, strength, branching pattern) in specific parts of the plant architecture, while maintaining the dark foliage coloration in the leaves, creating a cultivar with differentiated local qualities that together achieve container suitability

Inventive Principle:
Principle #3Local quality

3Stability of the object's composition

If Sedum cultivars are propagated sexually, then genetic diversity is improved, but characteristic stability and true-to-type reproduction are compromised

Engineering Contradiction:
Core Design Contradiction:
Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The patent uses asexual propagation by stem cuttings to create exact genetic copies of the selected parent plant, ensuring that the unique combination of traits (upright stems, dark burgundy foliage, well-branched habit, mildew resistance) is replicated true-to-type in successive generations without genetic variation

Inventive Principle:
Principle #26Copying

Data Source

PatentUSPP33994P2<i>Sedum </i>plant named ‘Dolseb’
Publication Date: 2022.03.01
  • USPP33994P2 patent drawing
  • USPP33994P2 patent drawing

AI summary

A new cultivar of Sedum plant named ‘Dolseb’ that is characterized by its upright, strong stems with suitability for use in large containers, its narrow leaves, its dark burgundy foliage, its well-branched growth habit, its resistance to mildew, its flowers that are red-pink in color and bloom in August to October in France, and its plant height of 40 cm.