Chromosomal mechanisms in adapting Allium hymenorhizum Ledeb. under introduction conditions

The paper presents a karyotypicel description of the rare relict species Allium hymenorhizum Ledeb. illustrated by three samples introduced to the South Ural Botanical Garden-Institute from the Bashkir Cis-Ural and South Ural regions. It was found out that the chromosome number in somatic tissue of this species is 2n=16; chromosomes are of medium size (6.05±0.15 to 9.35±0.22 μm) and belong to the metacentric and submetacentric types. The variability of chromosomal morphometric parameters is characterized by the extremely low, low and average values of the coefficients of variation. The samples introduced from different climatic conditions vary in the number and frequency of secondary constrictions in the chromosomal complements, this evidently being associated with the processes of their adaptation to new growing conditions.