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      The occurrence of dot-like micro B chromosomes in Korean field mice Apodemus peninsulae from the shore of the Teletskoye Lake (Altai Mountains)

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          The data on the changes in the cytogenetic structure of the geographic population of Korean field mouse Apodemus ( Alsomys) peninsulae Thomas, 1907 at the southern shore of the Teletskoye Lake (Altai Republic) are presented. In 1980 no dot-like microchromosomes were found in 34 mice captured on the southern and northern coasts of the Teletskoye Lake. In 2011, a 1.6-fold (from 2.7 to 4.3) increase in the mean number of B chromosomes compared to the rate estimated there earlier in 1980 was discovered. In 11 of the 15 mice (73%) captured in 2011, the karyotypes contained 1–2 dot-like micro B chromosomes and 1–5 macro B chromosomes. The pollution of the territory by the remains of the rocket fuel components may be an appropriate explanation for the cause of the karyological changes observed in A. peninsulae in this region.

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          Most cited references 18

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          A colchicine, hypotonic citrate, squash sequence for mammalian chromosomes.

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            Red fox genome assembly identifies genomic regions associated with tame and aggressive behaviours

            Strains of red fox ( Vulpes vulpes ) with markedly different behavioral phenotypes have been developed in the famous long-term selective breeding program known as the Russian farm-fox experiment. Here we sequenced and assembled the red fox genome and re-sequenced a subset of foxes from the tame, aggressive, and conventional farm-bred populations to identify genomic regions associated with the response to selection for behavior. Analysis of the resequenced genomes identified 103 regions with either significantly decreased heterozygosity in one of the three populations or increased divergence between the populations. A strong positional candidate gene for tame behavior was highlighted: SorCS1 , which encodes the main trafficking protein for AMPA glutamate receptors and neurexins and suggests a role for synaptic plasticity in fox domestication. Other regions identified as likely to have been under selection in foxes during domestication include genes implicated in human neurological disorders, mouse behavior, and dog domestication. The fox represents a powerful model for the genetic analysis of affiliative and aggressive behaviors that can benefit genetic studies of behavior in dogs and other mammals, including humans.
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              Comparative analysis of micro and macro B chromosomes in the Korean field mouse Apodemus peninsulae (Rodentia, Murinae) performed by chromosome microdissection and FISH.

              Comparative analysis of micro B and macro B chromosomes of the Korean field mouse Apodemus peninsulae, collected in populations from Siberia and the Russian Far East, was performed with Giemsa, DAPI, Ag-NOR staining and chromosome painting with whole and partial chromosome probes generated by microdissection and DOP-PCR. DNA composition of micro B chromosomes was different from that of macro B chromosomes. All analyzed micro B chromosomes contained clusters of DNA repeats associated with regions characterized by an uncondensed state in mitosis. Giemsa and DAPI staining did not reveal these regions. Their presence in micro B chromosomes led to their special morphology and underestimation in size. DNA repeat clusters homologous to DNA of micro B chromosome arms were also revealed in telomeric regions of some macro B chromosomes of specimens captured in Siberian regions. Neither active NORs nor clusters of ribosomal DNA were found in the uncondensed regions of micro B chromosomes. Possible evolutionary pathways for the origin of macro and micro B chromosomes are discussed. Copyright 2004 S. Karger AG, Basel

                Author and article information

                Comp Cytogenet
                Comp Cytogenet
                Comparative Cytogenetics
                Pensoft Publishers
                04 March 2020
                : 14
                : 1
                : 97-105
                [1 ] Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr.33, Moscow 119071, Russia Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences Moscow Russia
                [2 ] Institute of Systematics and Ecology of Animals, SB RAS, ul. Frunze 11, Novosibirsk 630091, Russia Institute of Systematics and Ecology of Animals, Russian Academy of Sciences Novosibirsk Russia
                [3 ] University of Nantes, UFR Medicine, 1 rue Gaston Veil, Nantes 44035, France University of Nantes Nantes France
                [4 ] Moscow Pedagogical State University, Institute of Biology and Chemistry, ul. Kibalchicha 6, Moscow 129164, Russia Moscow Pedagogical State University Moscow Russia
                Author notes
                Corresponding author: Yuriy M. Borisov ( boris@ 123456sevin.ru )

                Academic editor: T. Chassovnikarova

                Yuriy M. Borisov, Sergey A. Abramov, Marina Y. Borisova, Igor A. Zhigarev

                This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                Research Article
                Molecular Cytogenetics


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