Cannabis Genotyping via SNP Markers for Precise Classification
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Solution Overview
Problem
The taxonomy of Cannabis sativa and Cannabis indica is poorly understood, leading to challenges in accurately classifying cannabis for medicinal and commercial purposes, with existing methods relying heavily on morphology and THC production, which are not sufficient for precise differentiation.
Innovation Solution
The use of 14,031 single-nucleotide polymorphisms (SNPs) to genetically characterize cannabis samples, allowing for the differentiation of marijuana and hemp, as well as determining the ancestry contribution of Cannabis sativa and Cannabis indica, through genotyping and ancestry informative markers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If morphology and THC production methods are used to classify cannabis, then classification is simpler and faster, but classification precision is insufficient
Solution Approach 1:
The patent transitions from macroscopic parameters (morphology, THC content) to microscopic genetic parameters (SNP alleles) for classification. By analyzing allele presence/absence at multiple SNP loci, the method achieves both high precision in differentiation and maintains practical efficiency through standardized genotyping protocols.
2Measurement precision
If genome-wide SNP analysis is used to differentiate cannabis samples, then classification precision is improved, but device complexity and analysis cost increase
Solution Approach 1:
The patent divides the genome into specific segments at 10-100 SNP loci that are informative for differentiation. Rather than analyzing the entire genome, selected SNP regions are targeted for genotyping, reducing complexity while maintaining differentiation power. The method further segments analysis into presence/absence detection of specific alleles at each locus.
Solution Approach 2:
The patent extracts only the necessary genetic information from the genome by focusing on specific SNP loci that provide discriminatory power. By taking out and analyzing only these key genetic markers rather than the whole genome, the method achieves precise differentiation with reduced technical complexity and cost.
3Measurement precision
If more SNP loci are analyzed for ancestry determination, then ancestry contribution measurement precision is improved, but loss of time and computational resources increases
Solution Approach 1:
The patent applies partial action by analyzing a limited number of informative SNP loci (10-100) rather than the entire genome. This partial analysis of key genetic markers provides sufficient precision for ancestry determination while significantly reducing time and computational resources compared to whole-genome analysis.
Data Source
AI summary
Provided are methods for determining if a cannabis sample comprises hemp or marijuana, or Cannabis sativa and/or Cannabis indica as well as primers and kits for use in the methods.