Effects of environmental pollution on the rDNAomics of Amazonian fish
Effects of environmental pollution on the rDNAomics of Amazonian fish
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DOI：
10.1016/j.envpol.2019.05.112
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发表时间：
2019-09-01
影响因子：
8.9
通讯作者：
Gross, Maria Claudia
中科院分区：
文献类型：
--
作者：
da Silva, Francijara Araujo;Feldberg, Eliana;Gross, Maria Claudia
污染是全世界日益严重的环境问题，人类活动对生物多样性和自然种群遗传变异性的影响日益令人担忧，因为适应过程取决于这种变异性，特别是重复DNA中的变异性。在本研究中，线粒体DNA（COI）和重复DNA序列（18S和5S rDNA）在鱼类基因组中的分布进行了分析，在鱼类种群栖息在污染和未污染的沃茨在北方亚马逊河流域。结果表明，高度复杂的核糖体序列的鱼基因组中的污染的环境，因为这些序列主要涉及在维护基因组的完整性，介导的核糖体DNA的拷贝数在响应环境条件的变化的系统性增加。(C)2019爱思唯尔有限公司版权所有。
Pollution is a growing environmental problem throughout the world, and the impact of human activities on biodiversity and the genetic variability of natural populations is increasingly preoccupying, given that adaptive processes depend on this variability, in particular that found in the repetitive DNA. In the present study, the mitochondrial DNA (COI) and the distribution of repetitive DNA sequences (18S and 5S rDNA) in the fish genome were analysed in fish populations inhabiting both polluted and unpolluted waters in the northern Amazon basin. The results indicate highly complex ribosomal sequences in the fish genome from the polluted environment because these sequences are involved primarily in the maintenance of genome integrity, mediated by a systematic increase in the number of copies of the ribosomal DNA in response to changes in environmental conditions. (C) 2019 Elsevier Ltd. All rights reserved.