Exploring the Peanut Viromes Across 15 Cultivars in Korea

Area of Science:

• Plant Virology
• Molecular Biology
• Agricultural Science

Background:

• Peanut (Arachis hypogaea) is a vital crop facing threats from various viral pathogens.
• Understanding the peanut virome is essential for developing effective disease management strategies.
• Previous virome studies in Korean peanut cultivars are limited.

Purpose of the Study:

• To characterize the virome of fifteen peanut cultivars grown in Korea.
• To identify and quantify prevalent viral species affecting peanut crops.
• To analyze the genetic diversity and phylogenetic relationships of identified viruses.

Main Methods:

• RNA sequencing was employed to identify viral contigs across peanut samples.
• Viral abundance was assessed using viral reads and Transcripts Per Million (TPM) values.
• Complete viral genomes were assembled for phylogenetic analysis.
• Reverse Transcription Polymerase Chain Reaction (RT-PCR) and Single Nucleotide Polymorphism (SNP) analysis were used for confirmation and genetic diversity assessment.

Main Results:

• 305 viral contigs were identified, associated with cucumber mosaic virus (CMV), peanut mottle virus (PeMoV), bean common mosaic virus (BCMV), and brassica yellows virus (BrYV).
• CMV was the most prevalent virus detected across samples.
• Viral abundance varied, with CMV dominating reads and PeMoV showing prominence in normalized values in specific cultivars.
• Phylogenetic analysis revealed genetic relationships among isolates, and SNP analysis highlighted BCMV genetic diversity.

Conclusions:

• This research provides a foundational understanding of the peanut virome in Korea, identifying key viral threats.
• The findings underscore the importance of ongoing research for effective viral disease management in peanut cultivation.
• This study serves as a crucial resource for future investigations into peanut virology and crop protection.