Chrysanthemum White Rust Resistance Using Linked Molecular Markers
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Solution Overview
Problem
Existing technologies have not effectively addressed the need for durable genetic resistance to white rust in Chrysanthemum plants, leading to significant economic losses in cultivation.
Innovation Solution
Development of Chrysanthemum plants with genomic regions or genes providing resistance to white rust, represented by SEQ ID Nos. 1, 2, and 3, which are genetically linked and present in the plant's genome, along with molecular markers for identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If preventive spraying with fungicides is used, then white rust disease control is improved, but cultivation cost increases
Solution Approach 1:
The patent applies preliminary action by developing and deploying molecular markers (SEQ ID Nos. 1, 2, and 3) that enable early identification of white rust resistance genes in Chrysanthemum plants. This allows breeders to select resistant plants at the seedling stage through DNA analysis rather than waiting for disease symptoms to appear, thereby pre-establishing resistance before field deployment and eliminating the need for ongoing fungicide applications.
Solution Approach 2:
The patent replaces the mechanical/chemical system of fungicide spraying with a biological genetic system. By using molecular markers to identify and propagate plants with inherent genetic resistance (through natural resistance genes), the solution substitutes chemical disease control with genetically determined resistance, eliminating recurring chemical input costs while maintaining reliable disease control.
2Quantity of substance
If susceptible Chrysanthemum varieties are cultivated, then cultivation cost is reduced, but disease susceptibility increases
Solution Approach 1:
The patent introduces molecular markers (SEQ ID Nos. 1, 2, and 3) as intermediaries that bridge the gap between genetic resistance and phenotypic expression. These markers serve as detectable indicators that allow breeders and growers to identify resistant plants through simple DNA analysis, making the invisible genetic resistance visible and selectable. This intermediary enables the deployment of resistant varieties without requiring expensive chemical treatments.
3Reliability
If new resistance genes are developed, then durable white rust resistance is improved, but breeding complexity increases
Solution Approach 1:
The patent extracts the complexity of resistance gene identification and validation by isolating specific molecular markers (SEQ ID Nos. 1, 2, and 3) that are directly linked to white rust resistance. Instead of analyzing entire genomes or conducting complex multi-generational breeding trials, the invention extracts and utilizes these specific marker sequences as reliable indicators of resistance, dramatically simplifying the breeding process while ensuring durable resistance.
Data Source
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AI summary
The present invention relates to white rust resistant plants of the genus Chrysanthemum and to seeds, plant parts, plant cells and progeny thereof. The present invention further relates to means, and particularly molecular markers for identifying white rust resistant plants of the genus Chrysanthemum. Specifically, the present invention relates to plants belonging to the genus Chrysanthemum, the plants are resistant to white rust and the plants comprise in their genome at least one genomic region, or gene or allele, providing white rust resistance, the at least one genomic region, or gene or allele, providing white rust resistance is genetically linked to a nucleic acid sequence comprised in at least one copy in the genome of the resistant plants and is represented by SEQ ID No. 3