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The Journal of Heredity 2001:92(3)
© 2001 The American Genetic Association 92:282-287

Brief Communication

Chromosomal Mapping of 18S-28S rRNA Genes and 10 cDNA Clones of Human Chromosome 1 in the Musk Shrew (Suncus murinus)

A. Kuroiwa, K. Matsubara, T. Nagase, N. Nomura, J. K. Seong, A. Ishikawa, R. V. P. Anunciado, K. Tanaka, T. Yamagata, J. S. Masangkay, V.-B. Dang, T. Namikawa, and Y. Matsuda

From the Laboratory of Animal Genetics, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan (Kuroiwa, Ishikawa, Anunciado, Tanaka, Yamagata, and Namikawa), Laboratory of Cytogenetics, Division of Bioscience, Graduate School of Environmental Earth Science, Hokkaido University, Sapporo, Japan (Kuroiwa and Matsubara), Laboratory of Gene Structure I, Kazusa DNA Research Institute, Chiba, Japan (Nagase and Nomura), Division of Laboratory Animal Science, Medical Research Center, College of Medicine, Yonsei University, Seoul, Korea (Seong), College of Veterinary Medicine, University of the Philippines at Los Baños, Laguna, the Philippines (Anunciado and Masangkay), Faculty of Animal Science, Hanoi Agricultural University, Gialam, Hanoi, Vietnam (Dang), and Chromosome Research Unit, Faculty of Science, Hokkaido University, North 10, West 8, Kita-ku, Sapporo 060-0810, Japan (Matsuda).

Address correspondence to Yoichi Matsuda at the address above or e-mail: yoimatsu{at}ees.hokudai.ac.jp.

The direct R-banding fluorescence in situ hybridization (FISH) method was used to map 18S-28S ribosomal RNA genes and 10 human cDNA clones on the chromosomes of the musk shrew (Suncus murinus). The chromosomal locations of 18S-28S ribosomal RNA genes were examined in the five laboratory lines and wild animals captured in the Philippines and Vietnam, and the genes were found on chromosomes 5, 6, 9, and 13 with geographic variation. The comparative mapping of 10 cDNA clones of human chromosome 1 demonstrated that human chromosome 1 consisted of at least three segments homologous to Suncus chromosomes (chromosomes 7, 10, and 14). This approach with the direct R-banding FISH method is useful for constructing comparative maps between human and insectivore species and for explicating the process of chromosomal rearrangements during the evolution of mammals.


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