Abstract
AbstractThe house mouse, Mus musculus, is known for its highly conserved morphology and chromosomal structure, but some chromosomal characters have been recognized as accurate taxonomic markers in this species, e.g. centromeric heterochromatin, which is useful to identify the taxonomic status of house mouse. In this study, comprehensive cytogenetic surveys have been carried out in five to eighteen specimens of house mouse from each locality of Iran using centromeric heterochromatin banding (C-banding). C-banding was performed on the karyotype, and the centromeric heterochromatin region size (CHRs) was calculated using karyotype analysis software. Results indicated that intra- and inter- population variation of C-band positive heterochromatin ranged from very large CHRs to small CHRs. Generally, chromosomes 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16 and 19 showed high variability in their CHRs whereas chromosomes 1, 2, 3, 13, 17, 18 and X had low variability in CHRs. Chromosome 4 had the largest CHRs in all ...
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