Invasive weeds often pose a significant threat to agriculture. As a countermeasure, quarantine measures are used, the effective implementation of which requires methods for identifying diaspores (seeds, fruits) of plants in transported products. The use of molecular genetic identification methods as reliable and objective is highly promising.At present, there are practically no developed methods for use in laboratories, including for the listed quarantine objects Bidens bipinnata L. and B. pilosa L. A study was carried out of the genetic diversity of weeds of the genus Bidens L., section Psilocarpaea DС. at chloroplast (NdhF-rpl32) and nuclear (ITS1-5.8S-ITS2) loci. A conclusion is made about the practical inapplicability of identification by chloroplast loci and the suitability of identification by nuclear ones.

V.G. Kulakov, Yu.Yu. Kulakova, E.A. Volodina, K.N. Vishnyakov