GENETIC DIVERSITY OF TROUT (GENUS SALMO) FROM ITS MOST EASTERN NATIVE RANGE BASED ON MITOCHONDRIAL-DNA AND NUCLEAR GENE VARIATION
GENETIC DIVERSITY OF TROUT (GENUS SALMO) FROM ITS MOST EASTERN NATIVE RANGE BASED ON MITOCHONDRIAL-DNA AND NUCLEAR GENE VARIATION
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DOI：
10.1111/j.1365-294x.1995.tb00222.x
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发表时间：
1995-06-01
影响因子：
4.9
通讯作者：
OSINOV, A
中科院分区：
文献类型：
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作者：
BERNATCHEZ, L;OSINOV, A
俄罗斯和西亚港口的鳟鱼种群通常根据形态和生态变异被划分为不同的物种和亚种。为了评估它们的起源并验证传统分类学是否反映了它们的进化独特性，我们根据线粒体 DNA (mtDNA) RFLP、mtDNA 序列分析和等位酶变异记录了它们的遗传关系。线粒体DNA和核基因变异都定义了分布在北部（波罗的海、白海、巴伦支海）和南部（黑海、里海、咸海）海盆的两个古老的种群系统发育组合，这些海盆之间的基因流动是可能的，但在冰河后时期是有限的。这些结果支持了这两个地区种群之间的传统分类学差异。他们为南部褐鳟（Salmo trutta）种群基于其起源盆地的分类学区分提供了微弱的支持。他们还驳斥了 L. Sevan 鳟鱼（Salmo ischchan）与原始褐鳟鱼祖先分化的假设。然而，来自南部海盆的所有鳟鱼种群都拥有私人等位基因或线粒体DNA基因型，并且在遗传上是不同的。因此，它们代表了独特的基因库，需要个人对保护和管理的认可。
Russia and western Asia harbour trout populations that have been classified as distinct species and subspecies, most often on the basis of morphological and ecological variation. In order to assess their origins and to verify whether traditional taxonomy reflects their evolutionary distinctiveness, we documented their genetic relationships on the basis of mitochondrial DNA (mtDNA) RFLP, mtDNA sequence analysis, and allozyme variation. Both mtDNA and nuclear gene variation defined two ancient phylogenetic assemblages of populations distributed among northern (Baltic, White, Barents), and southern (Black, Caspian, Aral) sea basins, between which gene flow has been possible but limited in postglacial times. These results supported the traditional taxonomic differentiation between populations of these two regions. They provided weak support for the taxonomic distinction of southern brown trout (Salmo trutta) populations based on their basin of origin. They also refuted the hypothesis that L. Sevan trout (Salmo ischchan) diverged from a primitive brown trout ancestor. Nevertheless, all trout populations from southern sea basins possessed private alleles or mtDNA genotypes and were genetically distinct. Therefore, they represent unique gene pools that warrant individual recognition for conservation and management.