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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 #410580

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

Location: Plant Stress and Germplasm Development Research

Title: A recent survey and characterization of Fusarium oxysporum isolates collected in Uzbekistan

item Jobe, Timothy
item ABDURAKHMONOV, IBROKHIM - Uzbekistan Academy Of Sciences
item Ulloa, Mauricio
item Broders, Kirk
item HUTMACHER, ROBERT - University Of California, Davis
item BURIEV, ZABARDAST - Uzbekistan Academy Of Sciences
item SHERMATOV, SHUKHRAT - Uzbekistan Academy Of Sciences
item MAKAMOV, ABDUSALOM - Uzbekistan Academy Of Sciences
item USMANOV, DILSHOD - Uzbekistan Academy Of Sciences
item ELLIS, MARGARET - Fresno State University
item DARMANOV, MUKHTOR - Uzbekistan Academy Of Sciences

Submitted to: National Cotton Council Beltwide Cotton Conference
Publication Type: Abstract Only
Publication Acceptance Date: 11/30/2023
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Fusarium oxysporum f. sp vasinfectum (FOV) is a substantial cotton pathogen causing vascular wilt, browning of the vascular tissues, and plant death in the most severe cases. This global disease is responsible for sizable crop losses annually and is found in virtually all cotton producing regions, including the Republic of Uzbekistan. Since the Soviet era, cotton production in Uzbekistan has been vital to the nation’s economy as Uzbekistan is among the world’s largest producers of cotton. Previously, a survey of the Uzbekistan phytopathogen collection was performed to characterize and determine the distribution of races causing Fusarium wilt in Uzbekistan cotton. Of the six currently recognized races of FOV, only three races were identified – FOV1, FOV3, and FOV4/7. However, many of these isolates were maintained in the phytopathogen collection for years and do not necessarily reflect the current distribution of FOV. Thus, this study aimed to determine the most prevalent FOV races currently causing disease in Uzbekistan cotton fields. To this end, a field study was conducted in the Bukhara region of the Republic of Uzbekistan in the spring of 2022. New FOV isolates were obtained from Upland cotton exhibiting typical symptoms of Fusarium wilt. The race of each isolate was determined using molecular markers and a phylogenetic analysis was performed using partial EF1-a sequences from these new isolates. Results from these analyses will be shown along with an evaluation of new pathogenic FOV isolates in cotton.