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ARS Home » Plains Area » Lubbock, Texas » Cropping Systems Research Laboratory » Plant Stress and Germplasm Development Research » Research » Publications at this Location » Publication #420062

Research Project: Development of Climate Resilient Germplasm and Management Tools for Sustainable Row Crop Production

Location: Plant Stress and Germplasm Development Research

Title: Fusarium oxysporum f. sp. vasinfectum race 8 (FOV8): An overlooked cotton pathogen

Author
item Jobe, Timothy
item Ulloa, Mauricio
item GARCIA, JORGE - Fresno State University
item ULLNER, MICHAEL - Fresno State University
item HUTMACHER, ROBERT - University Of California, Davis
item ELLIS, MARGARET - Fresno State University

Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Abstract Only
Publication Acceptance Date: 11/9/2024
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Typical vascular plant diseases, such as Fusarium wilt (Fusarium oxysporum f.sp. vasinfectum (FOV) Atk. Sny & Hans) in cotton, represent expanding threats to crop production. FOV is a widespread soilborne pathogen that is responsible for substantial crop losses annually. There are currently six recognized races of FOV, and FOV race 8 (FOV8) is well established in the US despite receiving little attention among producers and researchers. In fact, a literature search shows that in recent field surveys of FOV infested fields, FOV8 has been found in Alabama, Georgia, and California. However, these studies focused on FOV4 or other FOV genotypes viewed to be more concerning. However, pathogenicity tests of FOV isolates in China showed FOV8 to be as pathogenic as FOV3 and FOV7. The persistence of FOV8 in producer's fields and the reported pathogenicity suggest FOV8 has been largely overlooked as a cotton pathogen. Genomic resources are needed to improve our understanding of FOV8 and to better understand its disease causing potential. Here, we report a high-quality whole genome sequence, assembly, and gene annotation of an FOV isolate collected from a field survey conducted in the San Joaquin Valley of California in 2021. Sequencing of the EF1-a gene and phylogenic analyses confirmed the isolate to be FOV8. High molecular weight DNA was extracted from mycelia produced from a single spore isolation. Genomic resources like this are crucial to facilitate the identification of genes (effector and receptors) and alleles important in host-plant interactions and for improving selection signatures relevant for resistance to diseases such as Fusarium wilt.