[Karyotype evolution in the genus Ellobius (Microtinae, Rodentia)]. 1991

Iu M Borisov, and E A Liapunova, and N N Borontsov

Comparative analysis was undertaken of the pattern of G-dyed chromosome sets of three Ellobius species: E. tancrei, E. fuscocapillus, E. lutescens with respective diploid chromosome numbers 54, 36, 17. From the data obtained one can envisage probable evolutionary pathway of the Ellobius karyotype. Variability in chromosome numbers of this genus species was shown to be a result of both centromeric and centromeric-telomeric as well as telomeric translocations of originally acrocentric chromosomes. No combinations of acrocentric chromosomes of the E. tancrei Robertsonian fan were found in the karyotypes of E. fuscocapillus and E. lutescens, which points to independence of the evolutionary processes in the Ellobius genus taking different routes. The data are obtained to the effect that evolution of the genus Ellobius was accompanied by increase in the amount of C-heterochromatin.

UI MeSH Term Description Entries
D007621 Karyotyping Mapping of the KARYOTYPE of a cell. Karyotype Analysis Methods,Analysis Method, Karyotype,Analysis Methods, Karyotype,Karyotype Analysis Method,Karyotypings,Method, Karyotype Analysis,Methods, Karyotype Analysis
D002875 Chromosomes In a prokaryotic cell or in the nucleus of a eukaryotic cell, a structure consisting of or containing DNA which carries the genetic information essential to the cell. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed) Chromosome
D003411 Arvicolinae A subfamily of MURIDAE found nearly world-wide and consisting of about 20 genera. Voles, lemmings, and muskrats are members. Clethrionomys,Cricetidae,Dicrostonyx,Lemmings,Lemmus,Mice, Red-Backed,Microtinae,Microtus,Muskrats,Ondatra,Voles,Arvicolines,Microtines,Mouse, Red-Backed,Myodes,Ondatra zibethicus,Arvicoline,Lemming,Mice, Red Backed,Microtine,Mouse, Red Backed,Muskrat,Red-Backed Mice,Red-Backed Mouse,Vole
D005075 Biological Evolution The process of cumulative change over successive generations through which organisms acquire their distinguishing morphological and physiological characteristics. Evolution, Biological
D006570 Heterochromatin The portion of chromosome material that remains condensed and is transcriptionally inactive during INTERPHASE. Heterochromatins
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D014178 Translocation, Genetic A type of chromosome aberration characterized by CHROMOSOME BREAKAGE and transfer of the broken-off portion to another location, often to a different chromosome. Chromosomal Translocation,Translocation, Chromosomal,Chromosomal Translocations,Genetic Translocation,Genetic Translocations,Translocations, Chromosomal,Translocations, Genetic

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