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Article

Chromosome Distribution of Highly Conserved Tandemly Arranged Repetitive DNAs in the Siberian Sturgeon (Acipenser baerii)

1
Institute of Molecular and Cellular Biology SB RAS, Lavrentiev Ave., 8/2, 630090 Novosibirsk, Russia
2
Department of Ichthyology and Hydrobiology, Tomsk State University, Lenin Ave, 36, 634050 Tomsk, Russia
3
Developmental Biochemistry, University of Wuerzburg, Biocenter, Am Hubland, 97074 Wuerzburg, Germany
4
Xiphophorus Genetic Stock Center, Texas State University, 601 University Drive, 419 Centennial Hall, San Marcos, TX 78666-4616, USA
5
Novosibirsk State University, Novosibirsk, Pirogova, 2, 630090 Novosibirsk, Russia
*
Author to whom correspondence should be addressed.
Genes 2020, 11(11), 1375; https://doi.org/10.3390/genes11111375
Received: 16 October 2020 / Revised: 13 November 2020 / Accepted: 16 November 2020 / Published: 20 November 2020
(This article belongs to the Special Issue Chromosome-Centric View of the Genome Organization and Evolution)
Polyploid genomes present a challenge for cytogenetic and genomic studies, due to the high number of similar size chromosomes and the simultaneous presence of hardly distinguishable paralogous elements. The karyotype of the Siberian sturgeon (Acipenser baerii) contains around 250 chromosomes and is remarkable for the presence of paralogs from two rounds of whole-genome duplications (WGD). In this study, we applied the sterlet-derived acipenserid satDNA-based whole chromosome-specific probes to analyze the Siberian sturgeon karyotype. We demonstrate that the last genome duplication event in the Siberian sturgeon was accompanied by the simultaneous expansion of several repetitive DNA families. Some of the repetitive probes serve as good cytogenetic markers distinguishing paralogous chromosomes and detecting ancestral syntenic regions, which underwent fusions and fissions. The tendency of minisatellite specificity for chromosome size groups previously observed in the sterlet genome is also visible in the Siberian sturgeon. We provide an initial physical chromosome map of the Siberian sturgeon genome supported by molecular markers. The application of these data will facilitate genomic studies in other recent polyploid sturgeon species. View Full-Text
Keywords: Acipenser baerii; sturgeon karyotype; whole-genome duplication; paralogs; polyploidy; acipenserid minisatellite; satellite DNA; tandem repeats Acipenser baerii; sturgeon karyotype; whole-genome duplication; paralogs; polyploidy; acipenserid minisatellite; satellite DNA; tandem repeats
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MDPI and ACS Style

Biltueva, L.S.; Prokopov, D.Y.; Romanenko, S.A.; Interesova, E.A.; Schartl, M.; Trifonov, V.A. Chromosome Distribution of Highly Conserved Tandemly Arranged Repetitive DNAs in the Siberian Sturgeon (Acipenser baerii). Genes 2020, 11, 1375. https://doi.org/10.3390/genes11111375

AMA Style

Biltueva LS, Prokopov DY, Romanenko SA, Interesova EA, Schartl M, Trifonov VA. Chromosome Distribution of Highly Conserved Tandemly Arranged Repetitive DNAs in the Siberian Sturgeon (Acipenser baerii). Genes. 2020; 11(11):1375. https://doi.org/10.3390/genes11111375

Chicago/Turabian Style

Biltueva, Larisa S., Dmitry Yu. Prokopov, Svetlana A. Romanenko, Elena A. Interesova, Manfred Schartl, and Vladimir A. Trifonov. 2020. "Chromosome Distribution of Highly Conserved Tandemly Arranged Repetitive DNAs in the Siberian Sturgeon (Acipenser baerii)" Genes 11, no. 11: 1375. https://doi.org/10.3390/genes11111375

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