One more Microtus species with asynaptic sex chromosomes

Jelena Blagojević, Marija Rajičić, Vladimir Jovanović, Tanja Adnađević, Ivana Budinski, Branka Pejić, Mladen Vujošević


Paper description:

  • The Genus Microtus is known as a karyotypically extremely polymorphic group, distinguished by numeric and morphological variations of chromosomes and the presence of species with asynaptic sex chromosomes.
  • Although asynaptic sex chromosomes are frequent in the Microtus genus, this is the first finding for the European pine vole, Microtus subterraneus (2n=52).
  • Up to now, pairing of sex chromosomes during meiosis was investigated in 26 species of which 18 are asynaptic, including this new finding.

Abstract: Arvicoline voles are known as a karyotypically extremely polymorphic group in which the genus Microtus leads with the highest rate of karyotype change. A member of this genus, the European pine vole Microtus subterraneus (de Selys-Longchamps, 1836), is widely distributed in Europe and parts of Asia. There are two cytotypes differing in diploid chromosome number, 2n=54 and 52, each showing different chromosomal polymorphisms. At two localities in southeastern Serbia, Mt. Jastrebac and Vlasina, we found the 2n=52 cytotype. Meiotic preparations from males revealed the presence of asynaptic sex chromosomes. Although asynaptic sex chromosomes are frequent in Microtus, this is the first finding for M. subterraneus. From summarized data it appears that two-thirds of the studied species, mainly from Microtus and Terricola subgenera, possess asynaptic sex chromosomes.

Received: November 13, 2017; Revised: January 12, 2018; Accepted: February 1, 2018; Published online: February 7, 2018

How to cite this article: Blagojević J, Rajičić M, Jovanović V, Adnađević T, Budinski I, Pejić B, Vujošević M. One more Microtus species with asynaptic sex chromosomes. Arch Biol Sci. 2018;70(3):…


Microtus subterraneus; asynaptic sex chromosomes; meiosis; pine vole; cytotypes

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