Adnagulova A.V., Vysochina N.P., Kartavtseva I.V.
Vestnik IrGSHA 2017; (83): 74-82
The research goal was to identify the chromosome and morphological characteristics of the m1 Khabarovsk population of Maximovich's vole ( Alexandromys maximowiczii Schrenck, 1858). Metaphase chromosomes were analyzed on an AxioSkop-40 light microscope. The teeth were taken with the Stemi 2000C (Carl Zeiss) stereomicroscope and the AxioCamHR digital camera with the help of the AxioVision 4.8 (Carl Zeiss) program, the FSC center for the biodiversity of the terrestrial biota of East Asia, FEB RAS. The variability of the morphotypes was determined from the left cheek tooth of the m1 Khabarovskii population. Asymmetry of the right and left teeth, as well as transitional variants, did not reveal. Skulls are stored in the FSC of the biodiversity of terrestrial biota of East Asia, FEB RAS. Judging by the chromosome analysis, one male in the karyotype had 41, the other voles had 40 chromosomes. The variability in the number of chromosomes is associated with a tandem fusion of two-arm chromosomes of medium size, and according to a morphological one, 10 morphotypes are allocated in 87 voles. The prevailing morphotype was 4M4 (74.7 %). The remaining variants are considered to be rare: 4M5 (6.9 %), 6M4 (2.3 %), 3M4 (4.6 %), 3M3 (1.1 %), 4M3 (1/2 %), 2M4 (1/2 %), 1T4 (1/1%), 4T4 (1/2 %), 1Ma1 (1.1 %). Particularly interesting was the version of the tooth, which is referred to as “maskii” (with the merged sixth and seventh triangles - Ma). There is a similarity between the voles of the Khabarovsk population and the seashore from the fossil material of the Bliznets cave, probably the Khabarovsk population is a representative of the range of the species that included the territory of Primorsky region in the late Pleistocene. It is established that the Khabarovsk population of Maximovich's voles has its own chromosomal and morphological features with stabilization of both chromosome and morphological characteristics.
