KASP Primers for Soybean Vitamin E Marker Detection
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Solution Overview
Problem
Traditional soybean breeding for vitamin E content is time-consuming, labor-intensive, and susceptible to environmental interference, with low accuracy.
Innovation Solution
Development of a molecular marker significantly associated with vitamin E content in soybeans, using a Kompetitive Allele-Specific polymerase chain reaction (KASP) primers combination, which allows for direct detection of A or T bases of SNP mutation sites, enabling pre-selection and molecular-assisted breeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional single-plant selection based on vitamin E content measurement is used, then breeding can proceed, but the process is time-consuming and labor-intensive
Solution Approach 1:
The patent develops KASP molecular markers that can detect SNP variations associated with vitamin E content in early breeding stages (low generation), enabling pre-selection of promising genotypes before phenotypic expression. This preliminary genetic screening eliminates the need to grow and measure all plants to maturity, dramatically reducing selection time and labor while maintaining breeding productivity
Solution Approach 2:
The patent replaces the mechanical/physical process of harvesting, extracting, and measuring vitamin E content in individual plants with a molecular biology-based KASP assay. This substitution uses PCR amplification and fluorescent detection to identify genetic markers associated with high vitamin E content, transforming a time-consuming biochemical measurement into a rapid molecular test that can be performed on small tissue samples
2Measurement precision
If traditional single-plant selection based on vitamin E content measurement is used, then breeding can proceed, but it is susceptible to environmental interference with low accuracy
Solution Approach 1:
The patent replaces phenotypic measurement (which is susceptible to environmental factors affecting vitamin E accumulation) with genotypic detection using KASP markers. By detecting SNP variations in DNA sequences associated with vitamin E metabolism genes, the method directly assesses genetic potential independent of environmental conditions such as soil, climate, or cultivation practices that can alter vitamin E content in the same genotype
Solution Approach 2:
The patent uses molecular markers as genetic copies or proxies for the actual vitamin E content trait. Instead of measuring the biochemical product (vitamin E) directly, which varies with environment, the method detects inherited DNA sequence variations that reliably predict the trait, creating an environmentally stable measurement through genetic copying of the inheritance pattern
3Productivity
If KASP molecular markers are developed based on SNP mining, then early stage selection is enabled, but the complexity of marker development increases
Solution Approach 1:
The patent develops KASP marker systems that can simultaneously detect multiple SNP loci associated with vitamin E content using a standardized assay platform. The KASP methodology provides a universal framework where allele-specific primers with fluorescent tags can detect different genetic variants in the same reaction system, allowing breeders to screen for multiple traits or alleles using a single standardized protocol rather than developing separate assays for each marker
Solution Approach 2:
The patent utilizes SNP (single nucleotide polymorphism) variations as detectable parameter changes in the DNA sequence. By focusing on single-base differences at specific genomic positions associated with vitamin E content, the method transforms complex genetic information into simple, detectable binary states (different alleles) that can be rapidly screened using fluorescent PCR, simplifying the detection process while maintaining the ability to identify important genetic variations
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 KASP primers combination effectively distinguishes and detects SNP mutation sites, facilitating early selection and improving breeding efficiency for soybeans with high vitamin E content, while reducing environmental influence and increasing accuracy.
Implementation Method 1
Forward primers with sequences that bind to different fluorescence and common reverse primers amplify DNA from samples by PCR
Implementation Method 2
It is based on allele-specific oligo extension and fluorescence resonance energy transfer for signal generation
Data Source
AI summary
A molecular marker significantly associated with vitamin E content in soybeans, a Kompetitive Allele-Specific polymerase chain reaction (KASP) primers combination and an application thereof are provided in the present disclosure, belonging to the field of molecular genetics and breeding. A nucleotide sequence of the molecular marker is shown in SEQ ID NO. 1, and there is an A/T mutation at the 21st base. The KASP primer set for detecting the molecular marker includes an upstream primer F1 with a nucleotide sequence as shown in SEQ ID NO. 2, an upstream primer F2 with a nucleotide sequence as shown in SEQ ID NO. 3 and a downstream primer r with a nucleotide sequence as shown in SEQ ID NO. 4. The KASP primers combination developed by the present disclosure accurately distinguish soybeans with high and low vitamin E content.