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United States Department of Agriculture

Agricultural Research Service

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Research Project: Ug99 Stem Rust Resistance in Barley

Location: Cereal Crops Research

Project Number: 3060-21000-037-20
Project Type: Specific Cooperative Agreement

Start Date: Jul 01, 2010
End Date: Jun 30, 2015

Objective:
The primary objective of this cooperative research project is to rapidly deploy the rpg4/Rpg5/Rrf1 (rRR) resistance complex into agronomically advanced Midwestern malting barley cultivars.

Approach:
The Rpg5 locus and the region around ARD199 will be sequenced to quickly identify SNPs diagnostic for resistant and susceptible genotypes. A set of molecular markers flanking the rRR resistance complex will be developed so genotyping for the region can be performed by standard PCR or by using high-throughput technology. Marker-assisted selection (using these molecular markers) will then be used to rapidly deploy the rRR resistance complex in barley germplasm. Specifically, resistance will be introduced into the Ug99 susceptible two-rowed (Pinnacle and Conlon) and six-rowed (ND25160) elite malting barley lines. Preliminary disease screening will be conducted in Fargo, with followup screening each year at the BL3 facility in St. Paul and at the stem rust nursery in Kenya.

Last Modified: 12/20/2014
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