Abstract: Flow cytometry refers to the technique where the measurement of the physical and chemical characteristics of particles including chromosomes, nuclei and cells is made as the particles pass in a fluid stream through a measuring point surrounded by an array of detectors. FCM (flow cytometry) analysis has played an important role in human genome projects. This technique is now increasingly used to establish flow karyotypes, sort chromosomes, map genes and construct DNA libraries in plants. This paper reviewed progress in flow cytometric analysis of plant genomes.