Cytogenetic polymorphism of seed progeny of introduced plants on the example of Rhododendron ledebourii Pojark. | Цитогенетический полиморфизм семенного потомства интродуцентов на примере Rhododendron ledebourii Pojark.

Cytogenetic polymorphism of seed progeny of introduced plants on the example of Rhododendron ledebourii Pojark. | Цитогенетический полиморфизм семенного потомства интродуцентов на примере Rhododendron ledebourii Pojark.

2018

Burmenko, J.V. | Baranova, T.V. | Kalaev, V.N. | Sorokopudov, V.N.

unknown. The study was made about cytogenetic polymorphism of Rhododendron ledebourii Pojark. seed progeny in the conditions of Central Black Soil Region. Based on the analysis of cytogenetic indices complex seedlings has been separated for groups according to the degree of genetic material stability (low-mutable, mutable and intermediate). It has been provided the cytogenetic characteristic of each selected group. In seed progeny of mutable group it has been showed a reduction in the mitotic activity; an increase in cell number of prophase stage of mitosis; an increase in the level of mitotic pathologies, indicating a high cytogenetic instability; an increase in cells with persistent nucleoli and a surface area of single nucleolus, which is associated with a change in biosynthetic processes in seedlings of this group. Low-mutable group of seedlings is characterized by increased mitotic activity and low values of cytogenetic disturbances. In the intermediate group it has been noted divergent trends of cytogenetic indices: two of them are similar to mutable, two of the other – with low-mutable group. The intermediate group similar to the mutable have the lower (in comparison with mutable group) level of mitotic pathologies and cells with persistent nucleoli, the higher surface area of single nucleoli and the larger number of active type nucleoli. Intermediate groups close to their cytogenetic characteristics to low-mutable have in comparison with it the lower mitotic index, a larger surface area of single nucleoli, in these groups could be a delay cells in prophase of mitosis and an increase in the number of metaphases, anaphases with persistent nucleoli. Comparison of experimental results with earlier findings for other woody plants showed that mutable group of seedlings, increases the level of mitosis pathologies and expanding their range with prevalence of disturbances related to the fragmentation of chromosomes. Low-mutable group is characterized by minimum values of mitotic pathologies with a large number of bridges in the spectrum of disturbances

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unknown. Проведено исследование цитогенетического полиморфизма семенного потомства рододендрона Ледебура

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Bibliographic information

Publisher

Altai State University

Other Subjects

Nucleolar characteristics; Mitotic activity; Persistent nucleoli; Seed progeny; Митотическая активность; Патологии митоза; Интродуцент; Mitotic pathologies; Семенное потомство; Ядрышковые характеристики; Cytogenetic polymorphism; Цитогенетический полиморфизм; Остаточные ядрышки; An introduced plant

License

Copyright (c) 2018 Turczaninowia, https://creativecommons.org/licenses/by-nd/4.0

ISSN

1560-7267, 1560-7259

Type

Info:eu-Repo/semantics/article; Info:eu-Repo/semantics/publishedversion

Source

Turczaninowia; Том 21 № 1 (2018); 164-173, Turczaninowia; Vol 21 No 1 (2018); 164-173, 1560-7267, 1560-7259