Application of digital PCR and CRISPR/Cas13a-based fluorescent assay for accurate and on-site detection of cotton leafroll dwarf virus.
Sheri V, Verma PK, Lekkala S, Janga MR
Crispr
Cotton fields in Texas are under threat from a spreading virus that's quietly cutting yields, and the new field-ready test could catch outbreaks before they jump to neighboring farms.
Cotton plants in parts of Texas are being infected by a virus that can devastate harvests. Researchers created two new tests to catch this virus: one super-accurate lab test that counts exactly how much virus is in a plant, and a simpler test using gene-editing technology that farmers or scouts could use right in the field without sending samples to a lab. The field test can spot the virus even when there are very few copies present, making early detection much more achievable.
Key Findings
The digital PCR method enabled absolute viral load quantification and outperformed standard RT-PCR sensitivity, with Brownfield (F2) samples showing significantly higher virus titers than Lubbock samples.
The CRISPR/Cas13a fluorescent assay detected as few as 50 RNA copies of the virus, establishing a practical field-level limit of detection.
The CRISPR-based test worked directly on crude leaf extracts without RNA purification, making it deployable in field settings without laboratory infrastructure.
chevron_right Technical Summary
Scientists developed two new methods to detect Cotton Leafroll Dwarf Virus more accurately and quickly than standard tests — one highly precise lab method and one fast, field-usable test that works without specialized equipment.
Abstract Preview
Cotton leafroll dwarf virus (CLRDV) is an emerging viral pathogen posing a significant threat to cotton production in the United States. Early and accurate detection is critical for effective disea...
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