Mapping quantitative trait loci and developing first molecular marker for race 5 of Podosphera xanthii resistance in melon (Cucumis melo L.)

Powdery mildew of melon caused by the Podosphaera xanthii factor is a disease that causes serious yield losses economically in all areas where grown from Asia to Europe and America. The use resistant varieties for control most environmentally friendly method. However, traditional methods breeding have made noteworthy input resistance improvement, but they been slow incompetent targeting complex powdery traits. To overcome these problems facilitate programs, molecular markers closely linked Pm-R5 gene are needed marker-assisted selection (MAS). present study aimed map quantitative trait locus identify with Pm-R which provides race 5 P. MAS melons. A total 310 primers/combinations belonging six marker systems including SRAP, SSR, ISSR, TRAP, CAPS, SCAR RIL population consisting 136 genotypes, developed crosses PMR-6 susceptible inbred line were used QTL mapping. Quantitative loci analysis determined one major (Pm-R) on linkage group I races mildew. SSR12202 at 2.12 cM genetic distance, CMCT170b CMMS30-3 support interval this QTL. co-dominant markers, together information reported here could be genotyping breeding.