Results and perspectives of cyto- and genetic studying of “cryptic” group of the Lacertidae

L.A. Kupriyanova and L.D. Safronova

Proceedings of the Zoological Institute RAS, 2020, 324(1): 100–107 · https://doi.org/10.31610/trudyzin/2020.324.1.100

Full text

Abstract

Results of chromosomal and molecular studies of the lizard Zootoca vivipara (Lichtenstein, 1823) (Lacertidae) from many geographically separate populations of Europe and Asia have been generalized. The questions of karyotype differences within the species, of diversity of its Zw and multiple Z₁Z₂W sex chromosome, their reorganizations and evolutionary consequences have been briefly considered. Stability of forming karyotypes is as an integrating factor which allow to identify the specimens and unite them into the groups possessing the distinct distribution areas. There are a correlation between chromosomal, mt DNA and nuclear DNA data. Finally all data obtained allow to draw a conclusion that Z. vivipara represents a cryptic group of cryptic taxa. Besides new data about the behavior of multiple sex chromosomes (SC, synaptonemal complexes) in early meiosis and molecular-cytogenetic data on transposable elements (TE) in the genome of Z. vivipara, their localization in the definite regions of chromosomes may suggest that they play a role in active speciation process by formation of cryptic taxa.

Key words

viviparous lizard Zootoca vivipara, karyotype, cryptic taxa, meiotic SC, (synaptonemal complex) chromosomes, multiple sex chromosomes, form-, sub-, speciation

Submitted February 4, 2020 · Accepted February 18, 2020 · Published March 24, 2020

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