Quantitative trait loci analysis of powdery mildew disease resistance in the Arabidopsis thaliana accession Kashmir-1

Powdery mildew diseases are economically important diseases, caused by obli gate biotrophic fungi of the Erysiphales. To understand the complex inherit ance of resistance to the powdery mildew disease in the model plant Arabido psis thaliana, quantitative trait loci analysis was performed using a set o f recombinant inbred lines derived from a cross between the resistant acces sion Kashmir-1 and the susceptible accession Columbia glabrous1. We identif ied and mapped three independent powdery mildew quantitative disease resist ance loci, which act additively to confer disease resistance. The locus wit h the strongest effect on resistance was mapped to a 500-kbp interval on ch romosome III.