Russian scientists have read the genome of the common shepherd's purse, which lives from the Arctic to the Antarctic. Its polyploid genome consists of subgenomes of two parental species, and neither of them dominates — this is a rare phenomenon; usually one of the parental genomes of a hybrid becomes dominant, and the other loses genes. The data obtained on the structure of the genome also speaks in favor of a single origin of the shepherd's purse, living in different geographical regions.