Next-Generation Sequencing Pipeline Enhances Citrus Pathogen Detection for Safer Germplasm Exchange

Citrus is one of the world’s most valuable fruit crops, but its global trade faces a persistent challenge—ensuring that germplasm exchanges do not inadvertently spread harmful pathogens. Traditional diagnostic methods, such as PCR and serological assays, are powerful but limited to detecting known pathogens. A recent study introduces a cutting-edge next-generation sequencing (NGS) pipeline that overcomes this limitation, enabling both detection of known pathogens and discovery of novel ones in citrus plants.

A Comprehensive Diagnostic Tool

The newly developed NGS pipeline integrates advanced bioinformatics workflows tailored to the unique virome and pathogen diversity of citrus. Unlike conventional methods that require prior knowledge of specific pathogens, this approach allows for unbiased screening, capturing viral, bacterial, and fungal pathogens in a single run.

Researchers validated the pipeline using diverse citrus samples, demonstrating its ability to detect a wide range of pathogens, including emerging threats that may escape traditional diagnostics. This makes the tool particularly valuable for germplasm exchange programs, where safeguarding plant material from hidden infections is critical.

Implications for Global Citrus Health

By providing a high-throughput, sensitive, and scalable method for pathogen surveillance, the NGS pipeline represents a major advancement in plant biosecurity. Its adoption could significantly reduce the risk of spreading destructive diseases such as citrus greening (HLB) and tristeza virus, both of which have devastated orchards worldwide.

Toward Safer Germplasm Exchange

The study emphasizes that integrating NGS-based diagnostics into quarantine and certification systems will not only protect citrus industries but also facilitate safer international trade. As climate change and globalization intensify the movement of plant material, tools like this pipeline are essential for ensuring long-term crop sustainability.

With this breakthrough, the citrus industry gains a powerful ally in the fight against pathogens—merging genomics with plant health management to secure the future of citrus cultivation worldwide.

Reference

Keremane, M., Singh, K., Ramadugu, C., Krueger, R. R., & Skaggs, T. H. (2024). Next generation sequencing, and development of a pipeline as a tool for the detection and discovery of citrus pathogens to facilitate safer germplasm exchange. Plants, 13(3), 411. https://doi.org/10.3390/plants13030411