Date of Award

2015

Publisher

North Dakota State University

Document Type

Thesis

Degree Awarded

Master of Science (MS)

Program

Plant Pathology

Department

Plant Pathology

College

Agriculture, Food Systems and Natural Resources

Faculty Advisor

Brueggeman, Robert S.

Description

Wheat stem rust, caused by Puccinia graminis f. sp. tritici (Pgt), is a major threat to barley and caused devastating reductions in yield and economic losses. The barley line Q21861 was identified as the best source of resistance to the potential threat posed by the highly virulent Pgt race TTKSK. Resistance to TTKSK was mapped to the telomeric region of chromosome 5HL, now designated as the rpg4-mediated resistance locus (RMRL). RMRL has been delimited into two tightly linked yet distinct loci, designated as RMRL1 and RMRL2. Three genes (HvRga1, Rpg5, and HvAdf3) were found at RMRL1 while gene(s) at RMRL2 remains unknown. BSMV-VIGS revealed that all three genes at RMRL1 are required for rpg4-mediated resistance, which follows the emerging theme of dual genetically linked NBS-LRR genes required for resistance. HvAdf3 may play an important role in controlling host-specific resistance as suggested by AtADF4 in the Arabidopsis-Pseudomonas syringae plant-microbe interaction model.

Rights

NDSU policy 190.6.2

Rights Link

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

Handle Identifier

https://hdl.handle.net/10365/27620

Download

Share

COinS