Technogenic pollution can accelerate microevolutionary processes in natural populations. We estimated the nuclear DNA content of 10 Bromus inermis Leyss. samples from the Middle and Southern Urals (Russia) by flow cytometry. These populations have grown under different levels of man-made pollution (heavy metals and radionuclides) and background (unexposed) localities. All populations of B. inermis had similar DNA contents, ranging from 21.82 to 23.55 pg/2C. The average DNA content of 22.61 ± 0.45 pg/2C, corresponding to a genome size of 11 056 Mbp/1C, indicates that all tested populations represent the octoploid form (2n = 56). Using a Bayesian linear mixed-effects model, the current materials were compared with previously published data. In general, the DNA contents of the impact populations did not deviate from the background density (p = 0.073–0.983). The current preliminary data do not confirm nor refute the presence of aneuploids in impacted B. inermis populations.

中文翻译：

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慢性人为污染对无头雀麦基因组大小的影响

技术污染可以加速自然种群的微进化过程。我们估计了 10 个无头无尾雀麦的核 DNA 含量。通过流式细胞术采集来自中乌拉尔和南部乌拉尔（俄罗斯）的样本。这些人口在不同程度的人为污染（重金属和放射性核素）和背景（未暴露）地点下增长。B. inermis 的所有种群都具有相似的 DNA 含量，范围从 21.82 到 23.55 pg/2C。平均 DNA 含量为 22.61 ± 0.45 pg/2C，对应于 11 056 Mbp/1C 的基因组大小，表明所有测试种群都代表八倍体形式 (2n = 56)。使用贝叶斯线性混合效应模型，将当前材料与先前公布的数据进行比较。一般来说，影响种群的 DNA 含量没有偏离背景密度（p = 0. 073–0.983）。当前的初步数据既不能证实也不能反驳受影响的 B. inermis 种群中存在非整倍体。