Dark Stem Cucumber Breeding via Molecular Markers
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Solution Overview
Problem
The challenge in cucumber breeding is the slow progress in developing varieties with extended storability, as the initial fruit color and ability to remain green during storage are influenced by genetic and environmental factors, making it time-consuming to achieve improved shelf life, and current methods like shrink-wrapping and wax-coating are costly and environmentally undesirable.
Innovation Solution
A new cucumber plant (Cucumis sativus) with a genetic determinant that results in a darker green stem and fruit color, which can be predicted phenotypically and genetically using molecular markers, such as AFLP markers E13/M51-143.48, E13/M51-154.68, and E16/M60-086.74, leading to increased chlorophyll content and extended storability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional breeding methods are used to develop cucumber varieties with extended storability, then improved shelf life can be achieved, but the process is time-consuming and requires many generations
Solution Approach 1:
The patent applies preliminary action by using molecular markers to identify and select plants with the desired dark green fruit color trait early in the breeding process, before the fruiting stage is reached. This allows breeders to make selection decisions at the seedling or vegetative stage, significantly reducing the time required to develop new varieties with improved storability.
Solution Approach 2:
The patent replaces traditional phenotypic selection methods (mechanical/visual inspection of adult plants) with molecular marker-based selection (genetic testing at early stages). This substitution enables earlier identification of desirable traits without waiting for fruit development, thereby accelerating the breeding cycle.
2Reliability
If post-harvest treatments like shrink-wrapping and wax-coating are used to improve fruit storability, then shelf life is extended, but costs increase and environmental impact worsens
Solution Approach 1:
The patent applies self-service by developing a plant variety that inherently possesses improved storability through its genetic makeup (dark green fruit color). The plant itself provides the protective function against deterioration during storage, eliminating the need for external post-harvest treatments like shrink-wrapping or wax-coating, thereby reducing production costs and environmental impact.
Solution Approach 2:
The patent changes the genetic parameter of the cucumber plant to produce fruits with inherently improved storability. By selecting and breeding for specific genetic traits (dark green coloration), the plant's natural properties are modified to provide better shelf life without requiring additional protective measures.
3Reliability
If post-harvest treatments like shrink-wrapping and wax-coating are used to improve fruit storability, then shelf life is extended, but additional handling and material costs are incurred
Solution Approach 1:
The patent applies self-service by developing a plant variety that inherently possesses improved storability through its genetic makeup (dark green fruit color). The plant itself provides the protective function against deterioration during storage, eliminating the need for external post-harvest treatments like shrink-wrapping or wax-coating, thereby reducing production costs and environmental impact.
4Measurement precision
If phenotypic observation of fruit color is used to select for improved storability, then selection can be made, but it can only be done at the adult plant stage after fruit harvest
Solution Approach 1:
The patent replaces traditional phenotypic selection methods (mechanical/visual inspection of adult plants) with molecular marker-based selection (genetic testing at early stages). This substitution enables earlier identification of desirable traits without waiting for fruit development, thereby accelerating the breeding cycle.
Solution Approach 2:
The patent applies preliminary action by using molecular markers to identify and select plants with the desired dark green fruit color trait early in the breeding process, before the fruiting stage is reached. This allows breeders to make selection decisions at the seedling or vegetative stage, significantly reducing the time required to develop new varieties with improved storability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The new cucumber plant exhibits a darker green stem and fruit color, maintaining a higher chlorophyll content during storage, resulting in improved storability and reduced need for costly post-harvest treatments like shrink-wrapping and wax-coating, while allowing early identification of plants with the desired trait.
Implementation Method 1
The new cucumber plant exhibits a darker green stem and fruit color, maintaining a higher chlorophyll content during storage
Data Source
AI summary
The present invention relates to a cucumber plant of the species Cucumis sativus carrying a genetic determinant that leads to a darker green stem in the seedling stage that is predictive of a darker green color of the fruits as compared to an isogenic cucumber plant not carrying the said genetic determinant, which genetic determinant is as comprised in a cucumber plant representative seed of which was deposited with the NCIMB under deposit number NCIMB 41859. The genetic determinant is suitably introgressed into the cucumber plant from a cucumber plant of which representative seed has been deposited with the NCIMB under deposit number NCIMB 41859.