Increased Rate of Fixation of Nucleotide Substitutions in the Mitochondrial DNA of Bony Fish Species (Osteichthyes) That Originated from the Arctic or Settled through It

IF 0.7 4区环境科学与生态学 Q4 ECOLOGY Contemporary Problems of Ecology Pub Date : 2024-06-04 DOI:10.1134/s1995425524700173

V. S. Artamonova, A. Y. Rolskii, M. V. Vinarski, A. A. Makhrov

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Abstract

The problem of differences in the rate of evolution among different animal or plant species has been intensely discussed in recent years, so the question of the validity of a so-called molecular clock hypothesis is very relevant. We have performed a search for publications describing median networks, which include haplotypes of mitochondrial genes for closely related boreal and arctic fish species (or those who settled through the Arctic). In all seven cases included into our analysis, the rate of nucleotide substitutions in Arctic taxa or taxa that settled through the Arctic during their evolutionary history was higher, and this difference was statistically significant. Therefore, the formation of new fish taxa in polar latitudes is accompanied by a rapid evolution of mitochondrial DNA that apparently reflects their adaptation to the new environment. In addition, speciation in Arctic fishes is usually accompanied by multiple chromosome fusions. Therefore, both our data and the data of other researchers provide solid reasons to doubt in the validity of the molecular clock hypothesis.

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起源于北极或定居于北极的骨鱼（Osteichthyes）线粒体 DNA 中核苷酸替换的固定率增加

摘要近年来，关于不同动物或植物物种之间进化速度差异的问题引起了激烈的讨论，因此所谓的分子钟假说的有效性问题非常重要。我们对描述中位网络的出版物进行了搜索，这些中位网络包括了密切相关的北方和北极鱼类物种（或在北极定居的鱼类）的线粒体基因单倍型。在我们分析的所有七个案例中，北极类群或在进化史上经过北极定居的类群的核苷酸替换率都较高，而且这种差异在统计学上具有显著性。因此，极地新鱼类类群的形成伴随着线粒体 DNA 的快速进化，这显然反映了它们对新环境的适应。此外，北极鱼类的物种分化通常伴随着多染色体融合。因此，我们的数据和其他研究人员的数据都为怀疑分子钟假说的正确性提供了可靠的理由。

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来源期刊

Contemporary Problems of Ecology 环境科学-生态学

CiteScore

1.40

自引率

12.50%

发文量

审稿时长

6-12 weeks

期刊介绍： Contemporary Problems of Ecology is a multidisciplinary periodical that publishes original works on the following subjects: theoretical and methodical issues of ecology, regional aspects of ecology, regional ecological disasters, structure and functioning of ecosystems, anthropogenic transformation of ecosystems. All basic aspects of modern ecology, including the most complicated interactions between living organisms and their environment, are presented. Some of the journal issues are dedicated to global changes in biological diversity at various levels of organization (populations, species, ecosystems) principles and methods of nature conservation.