The Karyotype of Amoeba borokensis from a “proteus-like” Amoeba Group (Amoebozoa: Euamoebida)
- Authors: Demin S.Y.1, Podlipaeva Y.I.1, Berdieva M.A.1, Goodkov A.V.1
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Affiliations:
- Institute of Cytology
- Issue: Vol 12, No 1 (2018)
- Pages: 85-91
- Section: Article
- URL: https://journals.rcsi.science/1990-519X/article/view/212590
- DOI: https://doi.org/10.1134/S1990519X18010054
- ID: 212590
Cite item
Abstract
The karyotype of Amoeba borokensis was studied for the first time. At the metaphase of mitosis, this species has a haploid set of chromosomes (n = 27). This is exactly half of the diploid karyotype in Amoeba proteus (strain B). At first glance, it confirms the idea that has recently appeared that one species arises from another via multiple changes in chromosome number. However, comparative cytogenetic analysis revealed that four orthologous chromosomes from haploid sets of these two species were not distinguished by the pattern of DAPI-stained bands. It shows that the genetic distance between A. proteus and A. borokensis is higher than was believed earlier and these two species have diverged from each other. Analysis of data on the life cycles of A. proteus and A. borokensis shows that a kind of so-called “cyclic polyploidy” takes place in “proteus-like” amoebae. “Cyclic polyploidy” has recently been considered as an alternative to the sexual process for genetic recombination in agamic protists from different macrotaxons.
About the authors
S. Yu. Demin
Institute of Cytology
Email: pelgood1@gmail.com
Russian Federation, St. Petersburg, 194064
Yu. I. Podlipaeva
Institute of Cytology
Email: pelgood1@gmail.com
Russian Federation, St. Petersburg, 194064
M. A. Berdieva
Institute of Cytology
Email: pelgood1@gmail.com
Russian Federation, St. Petersburg, 194064
A. V. Goodkov
Institute of Cytology
Author for correspondence.
Email: pelgood1@gmail.com
Russian Federation, St. Petersburg, 194064