An extensive research project led by palaeogeneticist Laurent Frantz from the Ludwig-Maximilian-Universität Müchen determined that dogs from Siberia resulted from cross-breeding with dogs from Eurasian populations over 2000 years ago. His findings along with artifacts found at ancient sites, shows extensive trading. Dogs were an important trade item between the Siberian people and people from the Eurasian steppe and Europe.
For example, he goes on to say that although a large percent of the Samoyed genome can be traced to original Artic bloodlines, it also shows more Western influence than the husky. This finding helps to explain why the Samoyed can herd reindeer yet the husky does not. According to his findings the Samoyed as a breed has had little changes since the Middle Ages.
It is also interesting to note that according to Frantz, although there was an exchange and inbreeding of Siberian dogs, there was no indication that the people intermarried. The human genomes stayed very stable over the same period.