Stevia Genetic Marker Screening for Steviol Glycoside Profiles
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Solution Overview
Problem
There is a need for further elucidation of genetic information on stevia plants to enhance the screening and selection of stevia plants with desirable steviol glycoside content for use as natural sweeteners.
Innovation Solution
A method for screening stevia plants by detecting specific genetic features in their genome, such as heterozygosity or homozygosity for certain alleles at positions 184, 170, and 92, which correlate with higher or lower content ratios of steviol glycosides like RebM, RebD, RebE, and others, using techniques like CAPS, dCAPS, or TaqMan PCR, and producing plants with these features through mutagenesis or crossing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If genetic screening methods are used to identify stevia plants with desired steviol glycoside content, then the precision of selecting plants with specific chemical features is improved, but the complexity of the screening process increases
Solution Approach 1:
The patent segments the complex genetic screening process into three specific, detectable genetic features (SEQ ID NO:1, SEQ ID NO:2, SEQ ID NO:3) that can be independently analyzed. By dividing the overall screening task into discrete genetic markers, the method achieves precise identification of stevia plants with desired steviol glycoside profiles while managing the complexity through structured, stepwise detection of individual genetic elements.
2Measurement precision
If multiple genetic features are detected to predict steviol glycoside content ratios, then the accuracy of predicting chemical composition is improved, but the time required for screening increases
Solution Approach 1:
The patent applies preliminary action by identifying and detecting specific genetic features (SEQ ID NO:1, SEQ ID NO:2, SEQ ID NO:3) in advance, before the actual steviol glycoside content measurement. By performing genetic screening upfront, the method predicts the chemical composition of stevia plants, allowing early selection of promising candidates and eliminating the need for time-consuming chemical analysis of all plants.
3Manufacturing precision
If specific alleles are selected to enhance certain steviol glycosides, then the quality of sweetener production is improved, but the variety of possible plant genotypes decreases
Solution Approach 1:
The patent applies local quality by focusing on specific genetic regions (SEQ ID NO:1, SEQ ID NO:2, SEQ ID NO:3) that control particular aspects of steviol glycoside production. Instead of requiring complete genetic uniformity, the method allows variation in other genomic regions while maintaining precise control over the specific genetic features that determine sweetener quality. This enables high-quality production while preserving overall genetic diversity.
Data Source
AI summary
Genetic information on stevia is elucidated. The present invention provides a method of screening for a stevia plant having at least one of the chemical features (a) to (r), comprising a step of detecting from the genome of a test stevia plant the presence and/or the absence of at least one of the genetic features (1) to (3), etc.