Variation of the nucleolus organizer regions within the Japanese dormouse Glirulus japonicus Schinz(Rodentia, Muscardinidae)

概要

論文の詳細を見る
Q- and C-banded karyotypes and the location of Ag-NORs were analyzed from each male specimen of the Japanese dormouse, Glirulus japonicus, obtained from different Prefectures of Nagasaki and Kumamato, and compared with those of the other specimen from Yamanashi Prefecture that have been previously reported (Oshida et al., 1997). All the specimens showed the same Q- and C-banded karyotypes with 2n=46, whereas the NOR-carrying chromosomes and the number of Ag-NORs appeared differently in each specimen, though all Ag-NORs were located in the telomeric region of each short arm of the NOR-carrying chromosomes. Ag-NORs were detected in pairs 8, 10, 19 and 22 from Nagasaki's specimen, and in pairs 8, 10, 11, and 22 from Kumamoto's, while Ag-NORs were present in pairs 8, 10 and 11 from the Yamanashi's specimen, indicating less NOR sites in the Yamanashi's specimen than the other two specimens. These results suggested specimen-specific differences in NOR-bearing chromosomes in different geographical distribution, which can provide the geographical variation of NOR locations within this species.
財団法人染色体学会の論文