Abstract
1) Nucleoli are organized at the primary constriction in Scilla sibirica and S. slbirica var. alba. This new type of SAT-chromosome was observed in Disporopsis arisanensis and Nerine undulata.
2) SAT-chromosome in Lycoris squanmigera (2n=27=6L+3St+18S) has a satellite at the proximal end and its stalk coincides with the primary constriction. While SAT-chromosome with a subterminal constriction of L. sanguinea has a satellite at the proximal end and then the relation between these SAT-chromosomes is not so simple.
3) Nothoscordum fragrans (2n=19=13Lt+2S) has thirteen long and six short chromosomes and each two of the latter chromosomes seem to be derived from fragmentation of one long chromosome at the kinetochore. Consequently six short chromosomes has terminal kinetochores four of which have an appearance of a satellite by bearing on the nucleolus condensation at that region. The short chromosome with a terminal kinetochore was found also in Allium condensatum (2n=17=11L+2M+2St+2S). These two chromosomes also have an origin in the fragmentation of one long chromosome, judging from a karyotype of A. obligonum (2n=16=12L+2M+2St).
4) Nerine undulata (2n=22=2L+11M+1Ms+1Ss+7S) has two SAT-chromosomes, that is, one medium chromosome with a secondary constriction at the distal arm and one short chromosome with an extremely lengthened primary constriction. The relation between nucleoli and SAT-chromosomes was carefully traced in the primary pollen grain division, and a certain chromosome was found attached to nucleolus besides SAT-chromosomes and had relation to the nucleolus condensation in the case of combination of no SAT-chromosomes.
