Abstract: A modified-bulk segregant analysis in combination with amplified fragment length polymorphism (AFLP) technique was used to identify markers associated with bloom time in a sour cherry population derived from crosses between two sour cherry (Prunus cerasus L., 2n=4x=32) cultivars, `Balaton` and `Surefire`. Screening of early and late extreme groups with 94 AFLP primer pairs resulted in the identification of two candidate bands in two different primer combinations (a 78 bp fragment in ETT/MCCG primer pair combination and a 92 bp fragment in EAA/MCGT primer pair combination). These candidate bands were present in the late bloom time group but not in the early group. Genetic markers linked to bloom time in sour cherry is very important, because utilization of markers will help the indirect selection of varieties for desirable bloom time in early generations, saving time and effort.