Kartavtseva I.V., SheremetyevaI.N., Pavlenko M.V.
В издании Modern achievements in population, evolutionary and ecological genetics (MAPEEG-2022): Program and Abstract of International Symposium
Год: 2022 Страницы: 26
The Evoron vole A. evoronensis is the endemic vole species found in the intermountain landscape of the southern Russian Far East. It inhabits the Evoron- Chukchagir lowland, the Upper Zeya Plain, and the Upper Bureya Depression. The Evoron voles of the Evoron-Chukchagir lowland, with the maximum number of chromosomes for the species (2n = 38–41, NF = 54–59), belong to the “Evoron” chromosomal race, as they were the first to be found on the shores of Lake Evoron. Voles with the minimum number of chromosomes for the species (2n = 34, 36, 37, NF = 51–56) were assigned to the “Argi” chromosomal race. Using GTG-, GTC-, NOR methods we described multiple structural chromosomal rearrangements in evoron vole (Kartavtseva et al., 2021 a, b). Two isolated populations of the “Argi” chromosomal race from Upper Zeya Plain, and the Upper Bureya Depression have identical polymorphism. We revealed the tandem fusions (Mev11/19, Mev13/15, Mev17/18, Mev6/7/14) and the Robertsonian translocations (Mev13.15 and Mev17.18) that led to eight new variants of the karyotype described. We observed the tandem fusion (Mev6/7/14) of chromosomes in heterozygous states in both populations. In the “Evoron” chromosomal race from Evoron- Chukchagir lowland the 4 chromosomes (Mev1, Mev4, Mev17, and Mev18) took part in tandem fusion. Tandem and Robertsonian rearrangements (Mev17/18 and Mev17.18) were revealed in both “Evoron” and “Argi” chromosomal races. The combination of all the variations of chromosomes for the species made it possible to describe 20 variants of the A. evoronensis karyotype, with 11 chromosomes which being involved in multiple structural rearrangements. Prolific offspring from the individuals with tandem fusion in the karyotype and a high percentage of this rearrangement in individuals from natural sample sets indicates the absence of a harmful effect on the viability of voles.
