title: A rise of ploidy level influences the rate of cytomixis in tobacco male meiosis.
abstract: The effect of plant ploidy level on the rate of cytomixis in microsporogenesis has been analyzed with the help of a unique model, the collection of tobacco plants of different ploidies (2n = 2x = 24, 4x = 48, 6x = 72, and 8x = 96). As has been shown, the rate of cytomixis proportionally increases in 6x and 8x cytotypes, being rather similar in 2x and 4x plants. The rate of cytomixis is highly variable, differing even in the genetically identical plants grown under the same conditions. The cytological pattern of cytomixis in the microsporogenesis of control 4x plants has been compared with the corresponding patterns of 2x, 6x, and 8x plants. Involvement of cytomixis in production of unreduced gametes and stabilization of the newly formed hybrid and polyploidy genomes is discussed.
authors.affiliation: Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, pr. Lavrentieva 10, Novosibirsk, 630090, Russia. mursalimovsr@gmail.com.
authors.forename: Sergey
authors.initials: S
authors.lastname: Mursalimov
authors.affiliation: Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, pr. Lavrentieva 10, Novosibirsk, 630090, Russia.
authors.forename: Yuri
authors.initials: Y
authors.lastname: Sidorchuk
authors.affiliation: Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Gatersleben, Corrensstraße 3, 06466, Stadt Seeland, Germany.
authors.forename: Dmitri
authors.initials: D
authors.lastname: Demidov
authors.affiliation: Leibniz Institute of Plant Genetics and Crop Plant Research (IPK) Gatersleben, Corrensstraße 3, 06466, Stadt Seeland, Germany.
authors.forename: Armin
authors.initials: A
authors.lastname: Meister
authors.affiliation: Institute of Cytology and Genetics, Siberian Branch, Russian Academy of Sciences, pr. Lavrentieva 10, Novosibirsk, 630090, Russia.
authors.forename: Elena
authors.initials: E
authors.lastname: Deineko
mesh_terms: D035264:Flowers / Q000033:anatomy & histology; D056130:Gametogenesis, Plant; D007621:Karyotyping; D008540:Meiosis; D011003:Ploidies; D014026:Nicotiana / Q000166:cytology*
keywords: Cytomixis; Haploids; Microsporogenesis; Nicotiana tabacum; Polyploids