Fig. 2. Rye heterochromatin as an indicator of telomere distribution. Single z-sections of early meiotic prophase nuclei are shown. Telomeres (green) were detected by FISH. Chromatin (red) was stained with DAPI. Heterochromatin is visible as intensely staining DAPI regions (indicated with ^*). (A) Dispersed telomeres prior to the bouquet. Five of the eight FISH signals in this section are associated with heterochromatin. (B) Clustered telomeres during the bouquet. A single heterochromatic region is evident. Bar, 10 µm.