On chromosome 2H, 18 SNP markers were found, including one aldehyde reductase gene Neuroplastin (SDR1), one gene interrelated with chloroplast development and plant growth named Probable GTP-binding protein (OBGC1), and three bacterial infection related genes Peroxidase 2 (PRX112), Probable acyl-CoA dehydrogenase (IBR3) and Ethylene-responsive transcription factor (RAP2-3). Here, NPTN is linked to bacterial infectious disease.