Abstract
The paper presents the results of studying the taxonomic relationships of Leymus secalinus (Georgi) Tzvelev. and L. littoralis (Griseb.) Peschkova in different geographical sites based on a comparison of ITS1-5.8S-ITS2 sequences of nuclear rDNA and cpDNA matK. Molecular genetic research of these species allowed us to expand the area of L. secalinus to the Aldan River basin (Yakutia).
Highlights
The genus Leymus (Hochst.) is polymorphic one, that’s why there are many unclear and controversial points in the taxonomy of the genus some species
The material for molecular genetic analysis was 38 samples of 5 species of the genus Leymus collected by the authors in sites of species natural growth during expeditions to various regions of Russia (Altai, Tuva, Irkutsk Region, Buryatia, Yakutia: Aldan, Zhatai, Yakutsk), Mongolia, China, and Kazakhstan in 2008-2018 (Fig. 1.)
The phylogenetic tree was done with Winclada software [5], using Nona [6] based on the combined sequences of rDNA ITS1-5.8S-ITS2 and cpDNA matK regions (Fig. 1), with a length of 1,985 nucleotide pairs for a single sample
Summary
The genus Leymus (Hochst.) is polymorphic one, that’s why there are many unclear and controversial points in the taxonomy of the genus some species. II was described by I.I.Georgi as Triticum secalinum Georgi on the basis of the dolinneevskyi description and species images on Stellers gatherings from the sandy shores of Lake Baikal and the island Olkhon, which were published by I.G. Gmelin, in «Flora Sibirica», Table.
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