title: Genetic variation in natural Melandrium album populations exposed to chronic ionizing radiation.
abstract: The effect of radiation pollution on genetic variation in natural populations of Melandrium album was investigated at the head part of the East-Ural Radioactive Trace (EURT) and background areas. The highest genetic differentiation estimated using FSTwas revealed between compared pairs of the background and impact samples in populations of M. album. The highest rate of polymorphism was observed at the closest to nuclear accident, Impact-1 site. The unique alleles (Mdh-3104, Pgi-2106, Lap105, Mdh-296, and Dia94) were discovered at the EURT. Individuals from chronically low-level irradiated sites were genetically closer than to plants from background sites using Nadhdh locus. The increase of the frequency of unique homozygous and heterozygous genotypes was identified in populations of M. album growing under chronic radiation exposure conditions. The largest contribution to the group of unique heterozygous genotypes at the EURT was made by three loci - Lap, Pgi-2, and Nadhdh; the main role in interpopulation differentiation of samples was made by the alleles Sod-2115, Skdh100, and Nadhdh100. Our results provide evidence for the correlation between the increase of genetic variation other than the «genetic erosion» and chronic radiation exposure factor in natural plant populations.
authors: Laboratory of Population Radiobiology, Institute of Plant and Animal Ecology, Ural Branch of the Russian Academy of Sciences, 8 Marta St., 202, Ekaterinburg, Russian Federation, 620144. elina@ipae.uran.ru.
authors: Elina
authors: E
authors: Karimullina
authors: Laboratory of Population Radiobiology, Institute of Plant and Animal Ecology, Ural Branch of the Russian Academy of Sciences, 8 Marta St., 202, Ekaterinburg, Russian Federation, 620144.
authors: Elena V
authors: EV
authors: Antonova
authors: Laboratory of Population Radiobiology, Institute of Plant and Animal Ecology, Ural Branch of the Russian Academy of Sciences, 8 Marta St., 202, Ekaterinburg, Russian Federation, 620144.
authors: Vera N
authors: VN
authors: Pozolotina
mesh_terms: D000483:Alleles; D029748:Caryophyllaceae / Q000235:genetics / Q000528:radiation effects*; D004787:Environmental Pollution; D014644:Genetic Variation; D005828:Genetics, Population; D007527:Isoenzymes / Q000235:genetics; D010944:Plants / Q000235:genetics; D011110:Polymorphism, Genetic; D011829:Radiation Dosage; D011839:Radiation, Ionizing; D018788:Radioactive Hazard Release; D012641:Selection, Genetic
chemical_list: D007527:Isoenzymes
keywords: Allozymes; Differentiation; Genetic variation; Kyshtym accident; Low-level radiation; Melandrium album (=Silene latifolia); Population structure