PLP 894 Plant Pathology Seminar: Keely Satterfield presenting
October 6, 2025 1:30PM - 2:30PM
PSSB 271 Conference Room
Abstract:
Each year Michigan plants greater than 400,000 acres of soft white and red winter wheat, making wheat the third most abundant crop in the state. Wheat viruses often impact production, however there is limited soft winter wheat virus research. Over two years, we conducted a commercial wheat field survey and tested leaf samples by ELISA and RT-PCR for the nine most common wheat viruses to gain an understanding of virus occurrence and incidence. The number of fields sampled per county was determined by 2023 fall planted acreage estimates, in which counties with higher planted acreage had more fields sampled. Each field had four composite samples of 20 symptomatic leaves. Over 2024 and 2025, 260 fields were sampled from 27 unique counties for a total of 1040 samples. Wheat streak mosaic virus (WSMV) was detected in 55% of samples. Barley yellow dwarf virus (BYDV)-PAV was detected in 24% of samples. Cereal yellow dwarf virus (CYDV)-RPV was detected in 8% of samples. Wheat spindle streak mosaic virus (WSSMV), brome mosaic virus (BMV), and High Plains wheat mosaic virus (HPWMoV) were detected in less than 3% of samples. Barley yellow dwarf virus (BYDV)-MAV and soil-borne wheat mosaic virus (SBWMV) were not detected in any samples. The final virus Triticum mosaic virus (TriMV) has not been tested by RT-PCR as of yet. Since WSMV was highly prevalent in our survey, we developed a screening method to assess the variability of soft winter wheat responses to WSMV. A total of 284 lines were inoculated at 10 days post planting and visual symptom assessments were conducted at two and four weeks post-inoculation. Together the survey and screening highlight the importance of wheat viruses to wheat production and will be used to educate growers and inform future wheat breeding.
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