Cytogeography of chenopodium of the European Russia in the context of the invasive aspect

The article deals with the study of the occurrence of the different chromosome numbers of the species Chenopodium in three populations: in the north, the middle part and the southeast of the European Russia, the percentage of the diploids and tetraploids and their bioclimatical and eco-geographical confinedness. The revealed regularity of the diploidy distribution in our study substantiates the large ecological plasticity and the invasiveness of the tetraploids in comparison with the diploids. The hypothesis of the preferred distribution of the polyploids in the north latitudes for Chenopodium is not substantiated.