Fig. 2.

One or two pairs of rDNA loci (red) were mapped by FISH on somatic prometaphase chromosomes (blue) of aO. sativa ssp. japonica cv. Nipponbare (AA), bO. glaberrima (AA), and cO. australiensis (EE), dO. sativa ssp. japonica cv. TNG 67, eO. sativa ssp. indica cv. IR36 and f Dular, gO. rufipogon (W0107), and hO. rufipogon (W1623). Note: the signals on chromosome 10 (arrows) were apparently less than those on chromosome 9 (arrowheads) in d and e. Centromeres are indicated by biotin-labeled pRCS2 (green) in a–c and h. Chromosomes were counterstained with DAPI (blue) and identified based on their morphology and length. Scale bar 10 μm