Genetics and Genomics of Pathogen Resistance in Switchgrass

Technical Report · Wed May 19 04:00:00 EDT 2021

DOI:https://doi.org/10.2172/1783170· OSTI ID:1783170

Yuen, Gary ^[1]; Edme, Serge ^[2]; Sarath, Gautam ^[2]; Palmer, Nathan ^[2]; Tatineni, Satyanarayana ^[2]; Mitchell, Robert ^[2]

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1. Univ. of Nebraska, Lincoln, NE (United States); University of Nebraska - Lincoln
2. USDA ARS, MD (United States)

This project investigates the genetic and genomic bases of resistance/tolerance to disease in switchgrass (Panicum virgatum) populations developed as bioenergy feedstock. The focus is placed populations adapted to the Central Great Plains derived from the hybridization of upland and lowland ecotypes, represented by cultivars Summer and Kanlow, respectively. Resistance was investigated against the rust disease caused by the fungus Puccinia novo-panici (syn. P emaculata) and mosaic disease caused by the virus complex of Panicum mosaic virus and its satellite. Objectives of the project were: 1) to elucidate the genetic and genomic bases of resistance/tolerance in locally adapted upland and lowland switchgrass breeding populations with contrasting disease symptoms under field conditions; 2) determine the molecular underpinnings of why cv Kanlow has broad resistance/tolerance to pathogens; and 3) discover the molecular differences that permit systemic viral infections in some switchgrass plants but not in other genetically-related plants.

• Research Organization: Univ. of Nebraska, Lincoln, NE (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Biological and Environmental Research (BER)
• DOE Contract Number: SC0016483
• OSTI ID: 1783170
• Report Number(s): FinalReport DOE UNL 16483
• Country of Publication: United States
• Language: English

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