“…7 also appears to have nucleolus-forming ability. In O. sativa, there are one or two pairs of nucleolar chromosomes in different strains (Selim 1930, Sakai 1938, and the second one seems to have a low nucleolus forming ability relative to the first, differing according to strains (Oka and Kao 1956). Whether such a situation as in O. sativa occurs in O. glaber rima or not is a problem for further study.…”