No 13 (2014): Ukrainian Antarctic Journal
Articles

New forms of chromosome polymorphism in Deschampsia Antarctica Desv. from the Argentine Islands of the Maritime Antarctic region

D. O Navrotska
Institute of Molecular Biology and Genetics of National Academy of Science of Ukraine, Ukraine, 03143, Kyiv, Akademica Zabolotnogo str., 150
M. O. Twardovska
Institute of Molecular Biology and Genetics of National Academy of Science of Ukraine, Ukraine, 03143, Kyiv, Akademica Zabolotnogo str., 150
I. O. Andreev
Institute of Molecular Biology and Genetics of National Academy of Science of Ukraine, Ukraine, 03143, Kyiv, Akademica Zabolotnogo str., 150
I. Yu. Parnikoza
Institute of Molecular Biology and Genetics of National Academy of Science of Ukraine, Ukraine, 03143, Kyiv, Akademica Zabolotnogo str., 150
A. A. Betekhtin
University of Silesia in Katowice, Faculty of Biology and Environmental Protection, Department of Plant Anatomy and Cytology, Poland, 40-032, Katowice, Jagiellonska str., 28
O. M. Zahrychuk
Тernopil Volodymyr Hnatiuk National Pedagogical University, Ukraine, 46027, Тernopil, М. Кryvonosa str., 2
N. M. Drobyk
Тernopil Volodymyr Hnatiuk National Pedagogical University, Ukraine, 46027, Тernopil, М. Кryvonosa str., 2
R. Hasterok
University of Silesia in Katowice, Faculty of Biology and Environmental Protection, Department of Plant Anatomy and Cytology, Poland, 40-032, Katowice, Jagiellonska str., 28
V. A. Kunakh
Institute of Molecular Biology and Genetics of National Academy of Science of Ukraine, Ukraine, 03143, Kyiv, Akademica Zabolotnogo str., 150
Keywords
  • Deschampsia antarctica Desv.,
  • chromosome number,
  • В chromosome,
  • mixoploidy,
  • chromosomal variability

Abstract

Cytogenetic analysis of D. antarctica plants from the Argentine Islands of the Maritime Antarctic region was performed. Chromosome number 2n = 26 was determined for most of the samples. New forms of chromosome polymorphism for the species were demonstrated for the first time. In particular, the plants from Darboux Island were found, to have some cells that contained one supernumerary B-chromosome along with 26 chromosomes of a regular set. The plants from Great Yalour Island were determined to be mixoploid – the number of chromosomes ranged from 13 to 39. The occurrence of new and unknown earlier karyotypic forms of D. antarctica might have resulted from increased genome instability due to the extreme environmental conditions in the Argentine Islands region.