Chromosome numbers in some alien plant species of the Novosibirsk Region: post V

Ключевые

Chromosome numbers were counted by direct observation in metaphase in root meristem squash preparations according to the method used by Zykova and Pankova (2021).Metaphase plates were observed under 100× magnification of the Axioscope 40 (Karl Zeiss, Axio Lab) microscope and photographed with an AxioCam MRc 5 digital camera.For all species, literature references on chromosome numbers known on material collected in Russia are given.In accordance with Goldblatt (1980) and Masterson (1994), we refer to polyploid plants with a chromosome number n ≥ 11.Latin names of plants are provided according to the "Catalogue of Life" (Bánki, 2023).Voucher specimens have been deposited to the "Herbarium of higher vascular plants, lichens and fungi (NS, NSK)", the scientific bioresource collection UNU No. USU 440537 of the Central Siberian Botanical Garden SB RAS (Novosibirsk).AMARANTHACEAE Axyris amaranthoides L., 2n = 18 "Novosibirsk Region, Novosibirsk City, Akademgorodok, Tereshkova Street, wasteland.07 IX 2021.E. Zykova" Z978-2621 (NS0046832) (Fig. 1A).
Distribution: Asian species with a secondary Holarctic range.Included in the Black Book of Siberian Flora (Antipova, 2016).In the Novosibirsk Region, as invasive species, found in disturbed habitats in most districts (Zykova, 2019).This is the first report of the chromosome number for the Novosibirsk Region.The same number was recorded from the Altai Territory (Lomonosova, Krasnikov, 1993), Republic of Sakha (Yakutia) (Lomonosova, Nikolin, 2013), Irkutsk Region (Chepinoga, 2014, and references therein).Diploid.
Distribution: European-West Asian species.Rare in the Novosibirsk Region, found in the city of Novosibirsk, and in three neighboring regions (Zykova, Shaulo, 2021).This is the first report of the chromosome number for this species in Russia.The same chromosome number is noted in populations of Europe and Kazakhstan (Rice et al., 2015).Polyploid.
Distribution: North American species, grown as a fodder and ornamental crop.Rare in Siberia, singly noted in the Kurgan Region and in the city of Novosibirsk (Zykova, Shaulo, 2019).This is the first report of the chromosome number for this species in Russia.The same chromosome number is noted in populations of Europe, Southeast Asia and USA (Rice et al., 2015) Distribution: This species has an almost cosmopolitan area cultivated as an oilseed and fodder plant.Rare in the Novosibirsk Region, recorded on railway embankments in the city of Novosibirsk (Zykova, 2019).This is the first report of the chromosome number for this species outside of culture in Russia.Distribution: A species with a Holarctic range.Rare in the Novosibirsk Region, recorded in Novosibirsk and five administrative districts (Zykova, 2019).This is the first report of the chromosome number for Siberia.The number 2n = 20 was registered in material from the Primorye Territory (Probatova et al., 2019), 2n = 30 -from the Stavropol Territory (Agapova et al., 1990) Distribution: Eurasian species.Found throughout the Novosibirsk Region (Krasnoborov, 2000).This is the first report of the chromosome number for the Novosibirsk Region.The same chromosome number was known for the Amur Region (Probatova et al., 2005), Primorye Territory (Probatova et al., 2017) and the Republic of Altai (Zykova et al., 2021a).Polyploid.
Distribution: An Asian species, settled in temperate and subtropical regions of the globe, including the most regions of Southern Siberia (Mikhaylova, Ebel, 2016).Rare in the Novosibirsk Region, found in the cities of Novosibirsk and Berdsk (Zykova, 2019).This is the first report of the chromosome number for the Novosibirsk Region.To this species chromosome number 2n = 42 are indicated for the Trans-Baikal Territory, Amur Region (Probatova et al., 2012), Irkutsk Region (Probatova et al., 2014), from the Republic of Altai (Zykova et al., 2021a); 2n = 56 -for the Irkutsk Region (Chepinoga, 2014, and references therein); 2n = 84 -for the Primorye Territory (Probatova, 2014, and references therein) and the Republic of Khakassia (Stepanov, 2018).Polyploid.
Distribution: Mediterranean cultigen species.One of the most popular grain and fodder crops in Siberia.Rarely found outside of crops in the Novosibirsk Region (Zykova, Shaulo, 2021).This is the first report of the chromosome number on the material collected outside of crops for Western Siberia.The number 2n = 48 was registered in material from the Irkutsk Region (Chepinoga, 2014, and references therein).Polyploid.
Distribution: Eurasian cultigen species.A grain crop popular in Siberia.Rarely found outside of crops in the Novosibirsk Region (Zykova, 2019).This is the first report of the chromosome number on the material collected outside of crops for Western Siberia.The same number was revealed for collections from the Irkutsk Region (Chepinoga, 2014, and references therein).Diploid.
Distribution: Cultivated all over the globe.Rare found as alien species in the Novosibirsk Region, recorded in the city of Novosibirsk, Krasnoozersky Chromosome numbers in some alien plant species of the Novosibirsk Region: post V (Zykova, 2019) and Maslyaninsky (Zykova, Shaulo, 2021) districts.This is the first report of the chromosome number for the Novosibirsk Region.The number of chromosomes 2n = 42 outside the culture in Siberia was determined from the Republic of Altai (Zykova et al., 2021b).Polyploid.
Distribution: Eurasian species with a secondary Holarctic range.Rare in the Novosibirsk Region, recorded for 10 administrative districts (Zykova, 2019).This is the first report of the chromosome number for the Novosibirsk Region.The same number was recorded from the Primorye Territory (Probatova, 2014, and references therein) and the Republic of Altai (An'kova, Zykova, 2018).Diploid.
Distribution: species with Holarctic range, secondary cosmopolitan.Active in the Novosibirsk Region, recorded in most administrative districts (Zykova, 2019).

Conclusion
The study provides the first records of chromosome numbers for 13 alien species based on the material from the Novosibirsk Region, three of them are invasive species on the territory of the Novosibirsk Region: Axyris amaranthoides (2n = 18), Psammophiliella muralis (2n = 34) and Potentilla norvegica (2n = 56).Of the studied species, 5 are diploids, 8 -polyploids.Our data agree with previously published information on the chromosome numbers of populations of Eastern Siberia, the Far East, and European Russia.