Date of Award

2017

Publisher

North Dakota State University

Document Type

Thesis

Degree Awarded

Master of Science (MS)

Program

Plant Sciences

Department

Plant Sciences

College

Agriculture, Food Systems and Natural Resources

Faculty Advisor

Faris, Justin D.

Description

Septoria nodorum blotch is a wheat foliar and glume disease caused by Parastagonospora nodorum, a necrotrophic fungal pathogen. Snn1-SnTox1, Snn3-B1-SnTox3, and Tsn1-SnToxA are three important interactions between wheat necrotrophic effector sensitivity genes and P. nodorum effectors. I evaluated a recombinant inbred population that segregated for these three necrotrophic effector sensitivity genes with P. nodorum isolates containing various combinations of the three corresponding necrotrophic effectors. The Tsn1-SnToxA and Snn3-B1-SnTox3 interactions explained up to 32.7 and 21.2% of the disease variation, respectively, when present. For most isolates the Snn1-SnTox1 interaction did not show a significant effect, however for some isolates, the interaction explained up to 30.2% of the disease variation. Necrotic flecking was observed on leaves of lines containing Snn1 and corresponded to the Snn1-SnTox1 interaction. The results from this study suggest that the amount of disease explained by each interaction varies by isolate and may be due to differential gene expression.

Rights

NDSU policy 190.6.2

Rights Link

https://www.ndsu.edu/fileadmin/policy/190.pdf

Handle Identifier

https://hdl.handle.net/10365/28453

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