Molecular Biology and Evolution, Vol 7, 271-282, Copyright © 1990 by Society for Molecular Biology and Evolution
H Suzuki, Y Kurihara, T Kanehisa and K Moriwaki
A silver staining method was used to analyze the distribution of nucleolar
organizer regions (Ag-NORs) on chromosomes of 45 wild mice (Mus musculus).
The four subspecies represented were M. m. musculus, M. m. molossinus, M.
m. castaneus, and M. m. bactrianus. Ag-NORs were observed near the
centromeric regions of 11 chromosomes (4, 8, 9, 10, 11, 12, 15, 16, 17, 18,
and 19), indicating a preponderance of Ag-NORs on smaller chromosomes. The
first five loci have not been observed previously. It is suggested that a
correlation may exist between the specific features of mouse Ag-NORs and
the events involved in intra- and interchromosomal homogenization of rDNA.
ORIGINAL ARTICLE
Variation in the distribution of silver-staining nucleolar organizer regions on the chromosomes of the wild mouse, Mus musculus
National Institute of Genetics, Japan.
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