Genetics, Vol. 158, 1301-1309, July 2001, Copyright © 2001

Quantitative Trait Loci Analysis of Powdery Mildew Disease Resistance in the Arabidopsis thaliana Accession Kashmir-1

Iain W. Wilsona, Céline L. Schiffa, Douglas E. Hughesa, and Shauna C. Somervillea
a Department of Plant Biology, Carnegie Institution of Washington, Stanford, California 94305

Corresponding author: Shauna C. Somerville, Department of Plant Biology, Carnegie Institution of Washington, 260 Panama St., Stanford, CA 94305., shauna{at}andrew2.stanford.edu (E-mail)

Communicating editor: A. H. D. BROWN

Powdery mildew diseases are economically important diseases, caused by obligate biotrophic fungi of the Erysiphales. To understand the complex inheritance of resistance to the powdery mildew disease in the model plant Arabidopsis thaliana, quantitative trait loci analysis was performed using a set of recombinant inbred lines derived from a cross between the resistant accession Kashmir-1 and the susceptible accession Columbia glabrous1. We identified and mapped three independent powdery mildew quantitative disease resistance loci, which act additively to confer disease resistance. The locus with the strongest effect on resistance was mapped to a 500-kbp interval on chromosome III.




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