To a question about marking of Pl loci controlling sunflower resistance to downy mildew pathogen

One of the most dangerous diseases on sunflower is downy mildew. By now, there are known more than 45 physiological races of the pathogen in the world. The effective method to control the pathogen is to introduce dominant gens of resistance into host-plant. The modern technologies of genetic typing using DNA-markers allowing controlling these genes present at the each stage of breeding process. Our research was conducted in the All-Russia Research Institute of Oil Crops by Pustovoit V.S., Krasnodar, at the laboratory of immunity and molecular marking. We approbated nine STS and three SSR-markers of the gens Pl5 , Pl6 and Pl8 well known from the literary sources which control sunflower resistance to P. halstedii races with purpose to identify these genes in lines-differentiators of sunflower resistance which are included into the international test-set for P. halstedii races identification. We selected and test a molecular STS-marker НАР3 which can be sued for identification of Pl6 locus controlling sunflower resistance to downy mildew pathogen.