ON THE KARYOLOGICAL DIFFERENTIATION IN CA UCASIAN POPULATIONS OF COMMON VOLE (RODENTIA, CRICETIDAE, MICROTUS)

Authors
Citation
Mi. Baskevich, ON THE KARYOLOGICAL DIFFERENTIATION IN CA UCASIAN POPULATIONS OF COMMON VOLE (RODENTIA, CRICETIDAE, MICROTUS), Zoologiceskij zurnal, 75(2), 1996, pp. 297-308
Citations number
48
Categorie Soggetti
Zoology
Journal title
ISSN journal
00445134
Volume
75
Issue
2
Year of publication
1996
Pages
297 - 308
Database
ISI
SICI code
0044-5134(1996)75:2<297:OTKDIC>2.0.ZU;2-A
Abstract
This study of karyotypes of 24 specimens of common voles from 8 locali ties of the Caucasus and the Cis-Caucasian region was carried out. The specimen of 54-chromosome M. rossiaemeridionalis from Stavropol distr ict has the standard karyotype (NF = 56) without any rearrangements. A ll other specimens from the Caucasus belong to 46-chromosome M. arvali s form ''obscurus''. The interpopulation variation determined by the v ariability of fundamental number and the morphology of Y-chromosome wa s noted. Three variants of karyotype were revealed: 1) NF = 72, Y-chro mosome is meta-submetacentric; 2) NF = 72, Y-chromosome is acrocentric ; 3) NF = 74, Y-chromosome is acrocentric. The review of chromosome va riability in the Caucasian populations of M. arvalis (2n = 46) caused by the variability of the morphology of small pairs of autosomes and Y -chromosome is compiled. The variability of heterochromatine localizat ion in the karyotype of common vole M. arvalis form ''obscurus'' in th e Caucasus is described. The results are evaluated in taxonomic and ev olutionary aspects.