Home – Home – Jornals – Flora and Vegetation of Asian Russia 2023 number 3

This message begins a series of notes on the study of the chromosome numbers of plant species grown on the collection “Rare and endangered plant species of Siberia” in the Central Siberian Botanical Garden (CSBS SB RAS). The collection includes 429 specimens (99 % representatives of natural populations) from 278 taxa (species, hybrids), 127 genera, 58 families. 33 species are included in the list of the Red Book of the Russian Federation, 162 species in the regional Siberian Red Books. In addition to the species included in the Red Book lists, plants of species of scientific significance are grown - endemics, relics. Most species have been cultivated for more than 10 years, many of them for more than 30 years. The numbers of chromosomes of endangered species, endemic are represented insignificantly in the literature. This study is part of the certification of introducers and is necessary for the comprehensive study of rare and endangered species. Two types of roots were studied. The first type is roots in plants of vegetatively mobile species (Cruciata glabra subsp. krylovii (Iljin) E.G. Naumova), also of plants formed by self-seeding Tridactylina kirilowii (Turcz.) Sch. Bip. The second type is the roots of sprouted seeds. We used the methodological recommendations of the Central Committee of the CSBS SB RAS. The chromosome numbers have been determined: Cruciata glabra subsp. krylovii (Iljin) E.G. Naumova (2n = 22, 33, 44), Saposhnikovia divaricata (Turcz.) Schischk. (2n = 16), Sibiraea laevigata (L.) Maxim. (2n = 14), Tridactylina kirilowii (Turcz.) Sch. Bip. (2n = 18), Viola dactyloides Schult. (2n = 24); Viola jooi Janka (2n = 24); Viola mauritii Tepl. (2n = 20); Viola uliginosa Besser (2n = 20). All voucher specinems are presented in the herbarium NSK.