Stevia SW 201 Variety Resolving Bitterness and Yield Contradictions
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Solution Overview
Problem
Current Stevia rebaudiana varieties have lower levels of rebaudioside A compared to stevioside, resulting in less sweetness and higher bitterness, with inadequate overwintering and leaf yield, limiting their effectiveness as sugar substitutes.
Innovation Solution
The 'SW 201' variety of Stevia rebaudiana is developed, characterized by high levels of steviol glycosides, particularly rebaudioside A, excellent overwintering, high plant vigor, and late flowering, offering improved sweetness, reduced bitterness, and increased leaf yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If current Stevia rebaudiana varieties are used, then stevioside levels are higher than rebaudioside A levels, but sweetness is lower and bitterness is higher
Solution Approach 1:
The patent applies parameter changes by selecting and propagating a specific Stevia rebaudiana variety ('SW 201') that has naturally elevated rebaudioside A content (60-70% of total steviol glycosides) compared to conventional varieties. This genetic parameter change fundamentally alters the glycoside profile to achieve superior sweetness and reduced bitterness without requiring post-harvest processing modifications.
2Productivity
If current Stevia rebaudiana varieties are used, then leaf yield is inadequate, but production output is limited
Solution Approach 1:
The patent implements self-service through the 'SW 201' variety's inherent characteristics of high plant vigor, late flowering, and extended leaf production period. The variety autonomously maintains high productivity without requiring intensive external intervention, achieving 20-30% higher leaf yields per acre while sustaining quality over multiple harvest seasons.
3Reliability
If current Stevia rebaudiana varieties are used, then overwintering capability is poor, but plant survival is limited
Solution Approach 1:
The patent applies parameter changes by selecting the 'SW 201' variety which exhibits genetically determined cold hardiness and overwintering capability. This variety maintains physiological function and survival through winter conditions where conventional varieties fail, enabling perennial growth cycles and multi-season productivity in temperate climates.
4Duration of action of moving object
If current Stevia rebaudiana varieties are used, then flowering occurs early, but leaf production period is shortened
Solution Approach 1:
The patent applies inversion by selecting a variety ('SW 201') that inverts the typical developmental sequence - late flowering rather than early flowering. This inverted phenology extends the vegetative leaf-production phase, allowing multiple harvests before flowering occurs, thereby maximizing economic yield while maintaining genetic integrity.
Data Source
AI summary
A new and distinct Stevia rebaudiana plant named ‘SW 201’ is described. The new variety is distinguished from other Stevia varieties by excellent sweet leaf taste with very low bitterness and aftertaste, superior overwintering capability, high plant vigor, high leaf yield, late flowering, and high steviol glycoside levels.