Evidence of dispersal between the Yenisei and the Lena river basins during the late Pleistocene within the whitefish (Coregonus lavaretus pidschian) complex

The Coregonus lavaretus (Linnaeus, 1758) complex is a morphologically and genetically diverse group of whitefish. Its taxonomic structure has been controversial for almost a century. At least 25 forms of C. lavaretus have been described in Siberia, but there is still no consensus on their intraspecific structure and taxonomy. Coregonus lavaretus pidschian (Gmelin, 1789) was described as a subspecies of C. lavaretus. Recently, it was assumed that this subspecies is also a complex. The purpose of this study was to compare the distributions of pidschian-like whitefish haplotypes in two basins of large Siberian rivers, Yenisei and Lena, and to assess the gene flow between basins of these rivers, which were connected after the last glaciation. The sequence of the following mitochondrial DNA genes, 16S rRNA (partial), tRNA-Leu (full), NADH dehydrogenase subunit 1 (full), tRNA-Ile (full), and tRNA-Gln (partial), were used for the inference of intraspecific genetic structure of C. l. pidschian. Whitefish haplotypes were clustered into two groups according to their distribution between two large Siberian river basins; however, there were shared haplotypes indicating events of migration and hybridization, which could occur when Bolshoi Yenisei and Lena river systems were connected after the last glaciation (the Late Pleistocene).

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Intraspecific structure of the Coregonus lavaretus complex in water bodies of Siberia: a case of postglacial allopatric origin of Yukagirian whitefish

Canadian Journal of Zoology ◽

10.1139/cjz-2021-0045 ◽

2021 ◽

pp. 1040-1053

Author(s):

Nickolai A. Bochkarev ◽

Elena I. Zuykova ◽

Lyudmila A. Pestryakova ◽

Lena A. Ushnitskaya ◽

Evgeny S. Zakharov ◽

...

Keyword(s):

River Basins ◽

Nucleotide Composition ◽

Coregonus Lavaretus ◽

Amur River ◽

Its1 Region ◽

Phylogenetic Lineage ◽

Allopatric Species ◽

Intraspecific Structure ◽

Identical Nucleotide ◽

Kolyma River

The results of morphological and genetic analyses of forms/species of the Coregonus lavaretus pidschian (Gmelin, 1789) complex from the Indigirka and Kolyma river basins are presented in the context of there being recent postglacial speciation events. It has been found that the studied whitefishes belong to the sparsely rakered and low lateral-line forms and have previously been described as Coregonus lavaretus pidschian n. jucagiricus Drjagin (Berg), 1932. Based on these characters, this whitefish does not differ from most Arctic whitefish populations (in particular from Coregonus lavaretus glacialis Kirillov, 1972). Analysis of variability of the ND1 gene (mtDNA) showed that whitefishes from the Indigirka and Kolyma basins belong to a distant phylogenetic lineage, which is significantly different from all previously studied whitefish lineages from the Ob, Yenisei, Lena, Anadyr, and Amur river basins. Analysis of variability of the ITS1 fragment (nDNA) showed that all studied forms/species (from Ob River to Amur River basins), including C. l. pidschian n. jucagiricus, have a tandem arrangement of two identical nucleotide fragments and very similar nucleotide composition of the ITS1 region. Based on contemporary data, this phylogenetic lineage of the C. pidschian complex could be considered a young postglacial allopatric species.

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Departure from Neutrality at the Mitochondrial NADH Dehydrogenase Subunit 2 Gene in Humans, but Not in Chimpanzees

Genetics ◽

10.1093/genetics/148.1.409 ◽

1998 ◽

Vol 148 (1) ◽

pp. 409-421 ◽

Cited By ~ 2

Author(s):

Cheryl A Wise ◽

Michaela Sraml ◽

Simon Easteal

Keyword(s):

Nadh Dehydrogenase ◽

Statistical Tests ◽

Low Frequency ◽

Nadh Dehydrogenase Subunit ◽

Nadh Dehydrogenase Subunit 2 ◽

Tests Of Neutrality ◽

Slightly Deleterious Mutations ◽

Neutral Marker ◽

Transmembrane Regions ◽

Interspecific Comparisons

Abstract To test whether patterns of mitochondrial DNA (mtDNA) variation are consistent with a neutral model of molecular evolution, nucleotide sequences were determined for the 1041 bp of the NADH dehydrogenase subunit 2 (ND2) gene in 20 geographically diverse humans and 20 common chimpanzees. Contingency tests of neutrality were performed using four mutational categories for the ND2 molecule: synonymous and nonsynonymous mutations in the transmembrane regions, and synonymous and nonsynonymous mutations in the surface regions. The following three topological mutational categories were also used: intraspecific tips, intraspecific interiors, and interspecific fixed differences. The analyses reveal a significantly greater number of nonsynonymous polymorphisms within human transmembrane regions than expected based on interspecific comparisons, and they are inconsistent with a neutral equilibrium model. This pattern of excess nonsynonymous polymorphism is not seen within chimpanzees. Statistical tests of neutrality, such as Tajima's D test, and the D and F tests proposed by Fu and Li, indicate an excess of low frequency polymorphisms in the human data, but not in the chimpanzee data. This is consistent with recent directional selection, a population bottleneck or background selection of slightly deleterious mutations in human mtDNA samples. The analyses further support the idea that mitochondrial genome evolution is governed by selective forces that have the potential to affect its use as a “neutral” marker in evolutionary and population genetic studies.

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Molecular determination of the origin of acephalic cysticercus

Parasitology ◽

10.1017/s0031182004006262 ◽

2004 ◽

Vol 130 (2) ◽

pp. 239-246 ◽

Cited By ~ 8

Author(s):

J.-Y. CHUNG ◽

W.-G. KHO ◽

S.-Y. HWANG ◽

E.-Y. JE ◽

Y.-T. CHUNG ◽

...

Keyword(s):

Nadh Dehydrogenase ◽

Fatal Outcome ◽

Constitutive Expression ◽

Molecular Data ◽

Molecular Characteristics ◽

Nadh Dehydrogenase Subunit ◽

Subarachnoidal Space ◽

Species Specific ◽

Molecular Determination

Acephalic cysticercus (Ac), a rarely developed multilobulated and nonencysted form of larval Taenia, causes hydrocephalus or adhesive arachnoiditis in the ventricles and subarachnoidal space that often lead to fatal outcome in affected patients. Ac has been proposed to originate from T. solium on the basis of morphological features, while no molecular data supporting the presumption have been available. In the present study, we investigated the immunological properties as well as molecular characteristics of Ac that was obtained surgically from 6 patients. Immunoblotting of the cyst fluid from Ac samples demonstrated the constitutive expression of a T. solium metacestode (TsM) 10 kDa protein. Specific antibodies against the truncated 10 kDa protein, which appears to be species specific for TsM cysticercosis, were detected in both serum and cerebrospinal fluid samples of Ac patients. Nucleotide sequences of mitochondrial cytochrome c oxidase subunit I (COI) and NADH dehydrogenase subunit 1 (ND1) genes of Ac were almost identical to those of T. solium but differed substantially from those of the other Taenia species. In phylogenetic analysis, Ac clustered with T. solium in a well-supported clade. Our results strongly suggest that Ac may have originated from T. solium.

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Differential transcription profiles in Trypanosoma cruzi associated with clinical forms of Chagas disease: Maxicircle NADH dehydrogenase subunit 7 gene truncation in asymptomatic patient isolates

Molecular and Biochemical Parasitology ◽

10.1016/j.molbiopara.2006.08.008 ◽

2006 ◽

Vol 150 (2) ◽

pp. 236-248 ◽

Cited By ~ 19

Author(s):

Cassio S. Baptista ◽

Ricardo Z.N. Vêncio ◽

Sarah Abdala ◽

Julio César Carranza ◽

Scott J. Westenberger ◽

...

Keyword(s):

Trypanosoma Cruzi ◽

Chagas Disease ◽

Nadh Dehydrogenase ◽

Asymptomatic Patient ◽

Nadh Dehydrogenase Subunit ◽

Clinical Forms ◽

Transcription Profiles ◽

Differential Transcription

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NEW DATA ON THE EXTENT OF THE LAST PLEISTOCENE GLACIATION IN THE GORNAYA SHORIA

Bulletin of Kemerovo State University Series Biological Engineering and Earth Sciences ◽

10.21603/2542-2448-2017-3-24-26 ◽

2017 ◽

Vol 2017 (3) ◽

pp. 24-26

Author(s):

Марина Адаменко ◽

Marina Adamenko ◽

Ярослав Гутак ◽

Yaroslav Gutak ◽

Богдан Воробьев ◽

...

Keyword(s):

Late Pleistocene ◽

Field Research ◽

Early Summer ◽

Mountain Region ◽

Pleistocene Glaciation ◽

Mountain Valley ◽

North East ◽

Last Glaciation ◽

Extreme North

The article presents and summarizes the results of a field research on glacial relief of the Gornaya Shoria mountain region, within the Patyn mountain massif. The Patyn-2017 expedition was organized by the Russian Geographic Society. This region has been very poorly studied in the paleogeographical aspect. The available material can give only an approximate assessment of last glaciation in the Gornaya Shoria mountain region. The massif of Mount Patyn (1630 m) is located in the extreme north-east of the Mountain Shoria on the watershed of the Tashtyk and the Mrassu rivers. At present, the massif is completely devoid of modern glaciation. Early summer snowfields appear on the leeward slopes of the eastern, southern and northern macroslopes. The moraine deposits and the configuration of the relief forms have proved mountain-valley glaciation in the Late Pleistocene. The article also touches upon the issue of the origin of the so-called «megaliths» of the massif of Pustag mountain.

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