Huso dauricus Identification via PCR Molecular Markers
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Solution Overview
Problem
Current sturgeon germplasm identification methods are cumbersome, time-consuming, and unable to accurately distinguish Huso dauricus from other sturgeon species, particularly in hybrid identification, due to limitations in mitochondrial DNA and nuclear genome-based markers.
Innovation Solution
Development of specific DNA molecular markers, such as the Hdau216p and Hdau195l primer pairs, which utilize PCR amplification to identify Huso dauricus and its hybrids based on unique genomic insertions, enabling rapid and accurate differentiation from other sturgeon species.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mitochondrial DNA-based identification methods are used, then the identification process is simple, but it can only identify the female parent and cannot distinguish Huso dauricus from other sturgeon species
Solution Approach 1:
The patent divides the identification task into two parts: using mitochondrial DNA markers for female parent identification (simple operation) and nuclear genome microsatellite/SNP markers for species-specific identification (accurate differentiation). This segmentation allows each method to excel at its specific function while combining to provide complete identification capability.
Solution Approach 2:
The patent develops a multi-functional identification system that can simultaneously identify female parents, male parents, and distinguish between different sturgeon species using different marker sets. The nuclear genome markers serve multiple purposes including species identification, hybrid detection, and germplasm characterization.
2Measurement precision
If nuclear genome microsatellites and SNPs are used, then species differentiation capability is improved, but the operation becomes cumbersome and time-consuming
Solution Approach 1:
The patent extracts and focuses on specific highly-polymorphic microsatellite loci and SNP markers from the nuclear genome that provide maximum differentiation power with minimal markers. By selecting only the most informative markers rather than analyzing the entire genome, the method achieves high species differentiation accuracy while reducing operational complexity and time requirements.
Solution Approach 2:
The patent optimizes identification parameters by determining specific PCR cycling conditions, primer concentrations, and electrophoresis parameters for microsatellite and SNP analysis. This parameter optimization streamlines the操作流程 and reduces identification time while maintaining high accuracy in species differentiation.
3Reliability
If existing identification methods are used, then some level of identification is achieved, but they cannot completely distinguish Huso dauricus from other sturgeon species
Solution Approach 1:
The patent creates a composite identification approach combining multiple types of genetic markers (mitochondrial DNA, nuclear microsatellites, and SNPs) to achieve complete and reliable species discrimination. This composite marker system leverages the complementary strengths of each marker type to provide unambiguous identification of Huso dauricus and its hybrids.
Solution Approach 2:
The patent establishes a feedback mechanism where identification results from multiple marker systems are cross-validated. The combined data from mitochondrial and nuclear markers provide mutual verification, ensuring high reliability and complete discrimination of Huso dauricus from other sturgeon species.
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 proposed solution allows for rapid and accurate identification of Huso dauricus and its hybrids, overcoming the limitations of existing methods by using PCR to detect specific amplification products, thereby supporting the healthy development of the sturgeon industry and germplasm resource protection.
Implementation Method 1
utilize PCR amplification to identify Huso dauricus and its hybrids based on unique genomic insertions
Data Source
AI summary
A method for rapid identification of Huso dauricus and its hybrids provides a DNA molecule of SEQ ID NO: 1 and application of the DNA molecule or more than 10 consecutive nucleotides therein or more than 3 consecutive nucleotides at a terminal thereof as a sturgeon germplasm molecular marker for identifying a sturgeon germplasm of interest, which is Huso dauricus or hybrids of Huso dauricus and other sturgeons. 50 bp InDel mutation region unique to Huso dauricus is screened out. Based on the specific insert fragment, a dominant/co-dominant germplasm-specific molecular marker is developed for identifying Huso dauricus and its hybrids. The dominant molecular marker Hdau216p is used to identify Huso dauricus and hybrids of Huso dauricus blood. According to length specificity of PCR amplification products of Huso dauricus and other sturgeons, co-dominant molecular marker Hdau195l is used to quickly identify purebreds of Huso dauricus and corresponding hybrids by PCR.