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Unusually extensive karyotype reorganization in four congeneric Gerbillus species (Muridae: Gerbillinae)
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Unusually extensive karyotype reorganization in four congeneric Gerbillus species (Muridae: Gerbillinae)
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Unusually extensive karyotype reorganization in four congeneric Gerbillus species (Muridae: Gerbillinae)
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Journal Article
Unusually extensive karyotype reorganization in four congeneric Gerbillus species (Muridae: Gerbillinae)
2006
Overview
Comparative analysis of the G- and C-banding patterns in four morphologically poorly differentiated Gerbillus species (G. pyramidum, G. perpallidus, G. tarabuli and G. occiduus) was carried out. These gerbils have similar karyotype morphology with 2n and NF equal to 38/76, 40/76, 40/78 and 40/80, respectively. Our study revealed that possibly 70 Robertsonian (Rb) fusions, two pericentric inversions, one tandem translocation and at least 13 non-identified rearrangements have occurred during the karyotypic evolution of these species. The number of chromosomal changes by which any of these species differ from each other ranges from 33 to 49. One Rb fusion was common to two of the species, with only a single autosome-gonosome translocation shared by all four, suggesting a monophyletic origin of these karyotypically highly divergent species. Based on the chromosomal data obtained here, the systematic and geographic implications for these North African species are also discussed.
Publisher
S. Karger AG
