Fusarium-Resistant Celery via Genomic Region Selection
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Solution Overview
Problem
Current celery cultivars are not resistant to the highly virulent Fusarium oxysporum f. sp. Apii race 4, leading to significant losses in crop yield and quality, and existing control measures like fungicides have limited efficacy and environmental concerns.
Innovation Solution
Development of Apium graveolens plants with resistance encoded by specific genomic regions on linkage groups 4, 5, and 7, using genome engineering techniques such as microplast-mediated chromosome transfer and PCR amplifications to introduce resistance-conferring genomic fragments, allowing for the creation of Fusarium oxysporum f. sp. Apii race 4-resistant plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fungicides are used to control Fusarium oxysporum f. sp. Apii race 4, then disease control is achieved, but environmental harm increases and efficacy is limited
Solution Approach 1:
The patent converts the harmful effect of the fungus into a beneficial selection pressure by using it to identify and breed resistant plant varieties. The fungus, originally a harmful pathogen causing crop loss, becomes a tool for selecting desirable resistant traits through controlled infection assays and marker-assisted selection, ultimately eliminating the need for chemical control and its environmental harm.
Solution Approach 2:
The patent replaces the chemical mechanism of fungicides with a biological mechanism of genetic resistance. Instead of using chemical substances to control the disease, the solution involves identifying and propagating plants with specific genomic regions that confer natural resistance, substituting chemical control with genetically-based biological control.
2Productivity
If current celery cultivars are used, then cultivation is simple, but crop yield and quality suffer significant losses due to Fusarium oxysporum f. sp. Apii race 4
Solution Approach 1:
The patent performs preliminary identification and selection of resistant plants before large-scale cultivation. By using molecular markers to identify plants carrying resistance-conferring genomic regions prior to planting, the system ensures that only resistant varieties are cultivated, preventing yield losses before they occur rather than treating them after infection.
Solution Approach 2:
The patent changes the genetic parameter of the celery cultivars by introducing and selecting for specific genomic regions that confer resistance to Fusarium oxysporum f. sp. Apii race 4. This genetic parameter change transforms susceptible cultivars into resistant ones, thereby improving productivity without sacrificing reliability.
3Reliability
If resistant plants are developed through traditional breeding, then resistance is achieved, but breeding time and complexity increase significantly
Solution Approach 1:
The patent introduces molecular markers as intermediaries between the resistance trait and the selection process. These markers serve as detectable indicators that allow breeders to identify plants carrying resistance-conferring genomic regions without waiting for disease manifestation, dramatically accelerating the selection process compared to traditional phenotypic selection methods.
Solution Approach 2:
The patent replaces the time-consuming mechanical process of traditional phenotypic selection with a molecular-based selection system. Instead of growing plants and observing disease resistance phenotypes over long periods, the system uses molecular marker detection to identify resistant plants at the DNA level, substituting a fast biochemical assay for a slow biological growth and infection process.
Data Source
AI summary
Provided herein are Apium graveolens plants resistant to the plant pathogen Fusarium oxysporum f. sp. Apii race 4 and wherein the resistance is encoded by one genomic region or a combination of at least two, or three genomic regions. Also provided herein are methods for identifying the present Fusarium oxysporum f. sp. Apii race 4 resistant plants and to molecular markers for use in the present methods.