Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 6/7/2005
Publication Date: 1/15/2006
Citation: Barrett, B., Fellers, J.P. 2006. Linkage mapping of Lr17 in wheat. Plant and Animal Genome Conference Abstract.
Technical Abstract: Wheat leaf rust, caused by Puccinia triticina, is a continuous problem for wheat producers. Each year, millions of acres of wheat are infected by this economically important fungus. The major leaf rust resistance gene, Lr17, has been deployed in the hard red winter cultivar Jagger, which is now planted worldwide. Lr17 is positioned on the terminal portion of the short arm of 2A. Our objective was to use microsatellites and identify linked markers to follow this gene in breeding population. A mapping population was made from the cross of Chinese Spring by Thatcher Lr17. An F2 population consisting of 92 individuals were scored as seedlings and 12 chromosome 2AS SSR markers were found to be polymorphic in the parents. Of the 12, six were found to be closely linked to Lr17. Lr17 appears to be flanked by two markers, Xwmc382 and Xgwm614. These SSRs can be used in a marker assisted selected scheme and aid in positional cloning of the gene.