Researches on resistance breeding of sharka disease in peach, nectarine and apricots

This study aimed to obtain resistant peach, nectarin and apricot genotypes to "Sharka" disease with cross breeding method. Plum pox virus (PPV) causing Sharka disease is the most important viralagent for stone fruits. This disease is most harmful to apricot, plum and peach trees.In this study, local apricot varieties Hacıhaliloğlu and Kabaaşı, were crossed with foreign apricot varieties Stark Early Orange, Rojo Pasion, Murciana and P 1908 (peach clone from Prunus davidiana) known to be resistant to PPV. For peaches, commercial peach varieties Flored and Carolina were also crossed with Stark Early Orange (apricot) and P 1908 clone (peach). A total of 365 genotypes from crossing among 12 combinations (FLxSEO, FLxP1908, CLxSEO, CLx1908, KAxSEO, KAxP1908, HHxSEO, HHxP1908, MRxHH, MRxKA, RPxSEO, RPxKA were tested with SSR markers (P GS1.21, PGS1.24 ve ZP002). Approximately 138 genotypes PPV resistance were expected to be candidate for PPV resistance in future studies.