DETECTION OF RDNA SITES IN SUGARCANE BY FISH

Hybridization sites of an rDNA probe coding for the 5.85, 18S and 26S genes were detected on the chromosomes of sugarcane and a related genu s, Erianthus, using fluorescence in situ hybridization. One unpaired a nd five paired hybridization sites were detected in a Saccharum spp. h ybrid. A first introgression hybrid (I-1) between Saccharum officinaru m and Saccharum spontaneum had seven pairs of hybridization sites. A c lone of Erianthus arundinaceus showed six hybridization sites in somat ic tissue.