Abstract
The results of a karyological study of a peripheral isolated population of Scots pine (Pinus sylvestris L.) growing in the Shirinskaya steppe of Khakassia are presented. In the seed progeny of trees, disturbances of the number of chromosomes (myxoploidy) and a wide range of chromosomal rearrangements, including unique multiple aberrations, were revealed. For the first time at the population level, the highest occurrence of genomic and chromosomal rearrangements for this species was diagnosed. In fact, all seed progeny of the studied Scots pine population is mutant, which indicates probable adaptive changes in genotypes under isolation.
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