A comparison of the chromosome G-banding pattern in two Sorex species, S. satunini and S. araneus (Mammalia, Insectivora)

Borisov, Yuriy Mikhaylovich; Орлов, В. Н.

doi:10.3897/compcytogen.v6i3.3019

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…araneus because it shows the most primitive karyotype, which is characterized by polymorphic metacentric fusion j:l and more acrocentric chromosomes than other races [ 30 , 35 ]. The data concerning the rearrangements and chromosomal characters was taken from appropriate references [ 9 , 16 , 77 – 79 ], including the newest one based on Zoo-FISH hybridization [ 19 ]. We analysed 29 available chromosomal rearrangement characters by maximum parsimony approach in PAUP and Bayesian in MrBayes.…”

Section: Methodsmentioning

confidence: 99%

Evolutionary history and phylogeographic relationships of shrews from Sorex araneus group

et al. 2017

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Shrews of the Sorex genus are an evolutionarily successful group that includes more than 77 species widely distributed in Eurasia and North America. The genus is one of the rare cases where karyotypic changes reflect well the evolutionary relationships among its species. The taxa showing the greatest variation in karyotype are usually classified into the Sorex araneus group. Its evolution was associated with chromosomal rearrangements, which could have promoted fast diversification of this group into many chromosomal races and species. These processes were additionally complicated by introgressions of mitochondrial DNA, which made the evolutionary history of this group quite complex and difficult to infer. To tackle the problem, we performed multi-method phylogenetic analyses based on mitochondrial cytochrome b that is considered a good molecular marker available for many representatives of Sorex. The results were compared with phylogenies based on chromosomal rearrangement data and put into temporal and spatial context using molecular dating and historical biogeography methods. We complemented the study with the estimation of diversification rates within the S. araneus group as well as comparing the results with paleontological records and climatic oscillations within the last 4 million years. Based on the gathered data, we proposed a hypothetical scenario for the evolution and geographic dispersion of species belonging to the S. araneus group. The shrews began to diversify about 2.7 million years ago in Eurasia and then migrated at least twice to North America. The evolution of shrews was driven by Pleistocene glacial and interglacial cycles, which increased their speciation rate and the emergence of new lineages. The migrations of populations were accompanied by introgressions of mitochondrial DNA into native shrews and occurred at least twice.

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Section: Methodsmentioning

confidence: 99%

Evolutionary history and phylogeographic relationships of shrews from Sorex araneus group

et al. 2017

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“…However, a recent study by Borisov and Orlov (2012) comparing the G-banded karyotypes of Sorex satunini and S. araneus revealed major chromosomal rearrangements (S. satunini has a more rearranged karyotype than the species of the S. araneus group in Western Europe) what implied their evolutionary divergence. According to these authors, the number of chromosome rearrangements shared by the species of the Sorex "araneus" group suggests an Early Pleistocene common ancestor.…”

Section: Discussionmentioning

confidence: 99%

Contribution to the validity and taxonomic status of the European fossil shrew Sorex subaraneus and the origin of Sorex araneus (Soricidae, Eulipotyphla, Insectivora, Mammalia)

Rzebik-Kowalska

Pereswiet-Soltan²

2018

Palaeontol Electron

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The taxonomy of many fossil shrews in Europe is still unclear. The aim of the study was to establish the validity and the taxonomic status of the European fossil shrew, Sorex subaraneus, often compared with or identified as other fossil and recent species: Sorex runtonensis, Sorex tundrensis, Sorex satunini and Sorex araneus. Middle Pleistocene material of S. subaraneus from the type locality of Erpfingen (Germany) was redescribed, and it was compared with specimens of the same species found in Polish localities, with fossil specimens of S. runtonensis, fossil and recent S. araneus (all from Poland) as well as with fossil and recent Sorex tundrensis and Sorex satunini from Russia. The morphological characters, measurements and statistical analysis showed that S. subaraneus and S. runtonensis are valid species. Sorex subaraneus differs from the smaller S. runtonensis and S. tundrensis, similar in size S. satunini as well as from the larger S. araneus. A comparison of dimensions of several fossil and recent S. araneus populations from different localities demonstrated that it has not changed over geological time and that S. subaraneus differed in the same degree from its oldest late Middle Pleistocene, Late Pleistocene, Holocene and recent specimens living in the same area. The paleontological data show that S. runtonensis, S. subaraneus and S. araneus inhabited Europe at the same time. If the identification of the European remains of S. subaraneus and S. araneus is correct, then the ancestry of S. araneus from S. subaraneus is rather doubtful.

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“…It is worth noting that some fusions, for instance gh and hm absent in the h (as well as g and m ) series, were found outside the current list of chromosomal races. These are hm , present in an F1 interracial hybrid karyotype due to proposed whole arm reciprocal translocation ( WART ) ( Pavlova et al 2008 ), and gh , identified in the karyotype of a sibling species, S. satunini Ognev, 1922 ( Borisov and Orlov 2012 ). Besides, it seems remarkable that the chromosomes o and q , most “active” in fusions, are carriers of nucleolus organizing region ( NOR ), located distally at an acrocentric end ( Searle et al 1991 ).…”

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confidence: 99%

Notable homologous variation in chromosomal races of the common shrew

Bulatova¹

2020

CCG

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This paper is a review of the rare phenomenon of chromosome intraspecies variation manifested in monobrachial homology series in the comprehensively investigated karyotype of the common shrew Sorex araneus Linnaeus, 1758 (Eulipotyphla, Mammalia). The detailed dataset on the account of this mammalian species was drawn from the recently published monograph by Searle et al. (2019) “Shrews, Chromosomes and Speciation”. The parallels to the law of homologous series in variation by Nikolai Vavilov are discussed.

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A comparison of the chromosome G-banding pattern in two Sorex species, S. satunini and S. araneus (Mammalia, Insectivora)

Cited by 6 publications

References 8 publications

Evolutionary history and phylogeographic relationships of shrews from Sorex araneus group

Evolutionary history and phylogeographic relationships of shrews from Sorex araneus group

Contribution to the validity and taxonomic status of the European fossil shrew Sorex subaraneus and the origin of Sorex araneus (Soricidae, Eulipotyphla, Insectivora, Mammalia)

Notable homologous variation in chromosomal races of the common shrew

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