Transcriptional responses of grape powdery mildew resistance loci to Erysiphe necator

To evaluate the overlap amongst the defense mechanisms associated with eight grape powdery mildew resistance loci, the leaf transcriptome of fourteen grape accessions was profiled at 1 and 5 days post inoculation with the causal agent of grape powdery mildew, Erysiphe necator, or a mock solution. The fourteen grape accessions included eight breeding lines carrying a resistance locus: 09390-023 (Ren2+), 07712-06 (Ren3+), 13353-55 (Ren4D+), 14305-002 (Ren4U+), 14375-059 (Run1+), e6-23 (Run1.2b+), 09705-45 (Run2.1+), 08391-029 (Run2.2+); four breeding lines devoid of a resistance locus: 13353-33 (Ren4D-), 14305-001 (Ren4U-), 14375-063 (Run1-), 08391-028 (Run2.2-); two Vitis vinifera parents: F2-35 and Malaga Rosada.