CRISPR/Cas9-Mediated Editing in FAD2 Gene to Enhance Oil Quality in Soybean [Glycine max (L.) Merrill].
Rathod BU, Rajyaguru R, Dhawale RN, Tomar RS, Sharma S
Summary
PubMedResearchers used CRISPR gene editing to boost the healthier fat (oleic acid) in soybean oil from 22% to 42-45% while cutting the harmful linoleic acid, eliminating the need for hydrogenation that creates unhealthy trans-fats. The result is soybean oil that is both more nutritious and more stable on store shelves.
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Key Findings
CRISPR/Cas9 editing of the FAD2 gene in three soybean lines achieved 13.63% editing efficiency, increasing oleic acid from 22% to 42-45% in edited plants
Linoleic acid content reduced from 54% to 30-32%, resulting in a nearly 2-fold improvement in the oleic/linoleic acid ratio
Edited plants were confirmed transgene-free (no Cas9 or U3 sequences detected), containing only the desired genetic modification without foreign DNA
Original Abstract
Conventional soybean oil contains high levels of linoleic acid, which reduces oxidative stability and necessitates hydrogenation, leading to trans-fat formation. In this study, 40 Indian soybean genotypes were screened for fatty acid composition, and Gujarat Junagadh Soybean-3 (GJS-3) was selected for CRISPR/Cas9-mediated editing of the fatty acid desaturase-2 (FAD2) gene. Agrobacterium-mediated transformation produced 22 regenerated plants, of which 57.1% were PCR-positive for Cas9/sgRNA. Targeted single-nucleotide substitutions were confirmed by Sanger sequencing in three edited lines (T3, T7, and T15), corresponding to an editing efficiency of 13.63%. These lines exhibited a marked increase in oleic acid content (42-45%) compared with the wild type (22%) and a concomitant reduction in linoleic acid (30-32% vs. 54%), resulting in nearly a two-fold improvement in the oleic/linoleic acid ratio. PCR analysis confirmed the absence of Cas9 and U3 sequences, indicating transgene-free edited plants. This study provides the first evidence of CRISPR/Cas9-mediated FAD2 editing in an Indian soybean cultivar and demonstrates its effectiveness in improving oil quality, oxidative stability, and processing efficiency.
This connects to 8 other discoveries — 1 species, 2 topics, 5 related articles
Species Mentioned
The soybean, soy bean, or soya bean is a species of legume native to East Asia, widely grown for its edible bean. Soy is a staple crop, the world's most grown legume, and an important animal feed.
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