Winter Squash SNP Marker Screening for Powdery Mildew Resistance
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Solution Overview
Problem
There is a lack of powdery mildew-resistant winter squash cultivars, leading to reduced fruit yield due to diseases caused by powdery mildew fungi, necessitating the development of a reliable resistance marker and breeding method.
Innovation Solution
A powdery mildew resistance marker on chromosome 3 of winter squash plants, identified by specific SNP markers and base sequences, is used to select and produce powdery mildew-resistant winter squash plants through crossing and selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If powdery mildew resistant winter squash cultivars are bred, then disease resistance is improved, but breeding time and complexity increase
Solution Approach 1:
The invention identifies and utilizes molecular markers (SNPs) that are preliminarily associated with powdery mildew resistance loci on chromosome 3. By screening for these markers before actual disease exposure, breeders can predict resistance without waiting for lengthy field trials, thus reducing breeding time while maintaining reliability.
Solution Approach 2:
The invention replaces traditional mechanical/phenotypic screening methods (visual inspection of disease symptoms) with molecular marker-based detection. This substitution allows for early-stage genetic screening of seedlings, dramatically reducing the time required to identify resistant cultivars compared to traditional multi-year field testing.
2Object-affected harmful factors
If traditional disease management methods using chemical treatments are applied, then disease control is achieved, but labor and costs increase
Solution Approach 1:
The invention enables winter squash plants to provide their own disease resistance through naturally occurring genetic loci identified by molecular markers. Resistant cultivars inherently protect themselves against powdery mildew without requiring external chemical interventions, thereby eliminating labor and costs associated with chemical disease management.
3Measurement precision
If molecular marker screening is implemented, then selection precision is improved, but detection complexity increases
Solution Approach 1:
The invention extracts specific, discrete molecular markers (SNPs at defined positions) from the complex genome that are directly linked to powdery mildew resistance. By focusing on these specific marker loci rather than analyzing the entire genome or relying on complex phenotypic observations, the detection method achieves high precision while maintaining relative simplicity through targeted PCR-based screening.
Data Source
Figure 1~2
AI summary
The present invention provides to a novel powdery mildew resistance marker for winter squash plants, a powdery mildew resistant winter squash plant, and a method for producing a powdery mildew resistant winter squash plant using the same. The powdery mildew resistance marker for winter squash plants according to the present invention is characterized in that it includes a powdery mildew resistance locus on chromosome 3.