Wheat Breeding Method Using Molecular Markers for Yield and Quality
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Solution Overview
Problem
Current wheat breeding methods struggle to simultaneously improve yield and quality, with existing methods being labor-intensive and inefficient in meeting the demands of increasing labor costs and breeding scale, particularly in China, where the relationship between yield and quality remains unaddressed systematically.
Innovation Solution
A method involving the selection of parental combinations with high-quality related proteins, hybridization, and subsequent generations of sowing and selection based on specific criteria for yield, disease resistance, and protein content, utilizing molecular markers and phenotype identification to breed wheat varieties with improved yield and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional breeding methods (pedigree method, hybrid method) are used to improve wheat yield, then yield increases, but quality improvement is not achieved and labor costs increase
Solution Approach 1:
The patent applies preliminary action by pre-selecting parental lines based on molecular marker profiles before hybridization. Parents are screened for specific quality-related genes (gliadin, glutenin) and yield-related traits, so that the F1 generation inherits both high yield and high quality characteristics from the outset, eliminating the need for labor-intensive quality selection in subsequent generations
Solution Approach 2:
The patent replaces manual phenotypic selection with molecular marker-based selection. Instead of labor-intensive field evaluation of thousands of plants for quality traits, DNA markers are used to identify and select plants with desired quality genes, dramatically reducing labor requirements while maintaining selection accuracy
2Quantity of substance
If focus is placed on improving wheat yield through conventional methods, then yield increases, but quality remains unchanged or deteriorates
Solution Approach 1:
The patent applies local quality by selecting for specific quality traits in specific genetic loci through molecular markers. Instead of general quality improvement, the method targets specific proteins (gliadin, glutenin subunits) that determine flour quality, while simultaneously selecting for yield traits, achieving localized quality enhancement without compromising yield
Solution Approach 2:
The patent creates composite genetic material by combining parents with complementary traits - one parent contributing high yield characteristics and specific quality genes, another parent contributing additional quality proteins. The F1 generation inherits a composite genome that expresses both high yield and high quality traits simultaneously
3Quantity of substance
If breeders attempt to improve both yield and quality simultaneously, then both traits are targeted, but existing methods cannot achieve both goals effectively
Solution Approach 1:
The patent implements feedback by using molecular markers to continuously monitor the presence of desired quality and yield genes throughout the breeding process. The marker data provides real-time feedback on genetic composition, allowing breeders to make informed selection decisions at each generation, ensuring both yield and quality traits are maintained and improved
Solution Approach 2:
The patent creates a universal breeding system that can simultaneously select for multiple traits (yield, protein content, flour quality, disease resistance) using a single molecular marker-based approach. This multi-functional selection system replaces multiple separate selection processes, improving breeding efficiency while achieving both high yield and high quality
Data Source
AI summary
The present invention discloses an “inferior-eliminating and superior-selecting” breeding method for synergistically improving wheat yield and quality. A method for breeding target wheat varieties with improved yield and quality is provided herein, which combines the advantages of pedigree method and hybrid method, and provides a method for selection of all generations using molecular marker in combination with phenotype identification, and for selection of each generation according to different standards. Different from the derivative system method, the method reserves the traceability of line history and genetic relationship and the characteristics of simple operation and abundant genetic diversity of the hybrid method. The parents have clear backgrounds before combination and the selection process is simple and easy to operate, with clear goal, especially for those with no breeding experiences, it is easy to master and provides technical support for the rapid breeding of new varieties of high-quality and high-yield wheat.