Abstract
Comparative chromosome painting was applied to the Indian spiny mouse (Mus platythrix) with mouse (M. musculus) chromosome-specific probes for understanding the process of chromosome rearrangements between the two species. The chromosome locations of the 5S and 18S-28S ribosomal RNA genes and the order of the 119 and Tcp-1 genes in the In(17)2 region of the t-complex were also compared. All the painting probes were successfully hybridized to the Indian spiny mouse chromosomes, and a total of 27 segments homologous to mouse chromosomes were identified. The comparative FISH analysis revealed that tandem fusions were major events in the chromosome evolution of the Indian spiny mouse. In addition, other types of chromosome rearrangements, i.e. reciprocal translocations and insertions, were also included.
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