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Nedoluzhko A, Sharko F, Tsygankova S, Boulygina E, Slobodova N, Teslyuk A, Galindo-Villegas J, Rastorguev S. Intergeneric hybridization of two stickleback species leads to introgression of membrane-associated genes and invasive TE expansion. Front Genet 2022; 13:863547. [PMID: 36092944 PMCID: PMC9452749 DOI: 10.3389/fgene.2022.863547] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 07/20/2022] [Indexed: 12/03/2022] Open
Abstract
Interspecific hybridization has occurred relatively frequently during the evolution of vertebrates. This process usually abolishes reproductive isolation between the parental species. Moreover, it results in the exchange of genetic material and can lead to hybridogenic speciation. Hybridization between species has predominately been observed at the interspecific level, whereas intergeneric hybridization is rarer. Here, using whole-genome sequencing analysis, we describe clear and reliable signals of intergeneric introgression between the three-spined stickleback (Gasterosteus aculeatus) and its distant mostly freshwater relative the nine-spined stickleback (Pungitius pungitius) that inhabit northwestern Russia. Through comparative analysis, we demonstrate that such introgression phenomena apparently take place in the moderate-salinity White Sea basin, although it is not detected in Japanese sea stickleback populations. Bioinformatical analysis of the sites influenced by introgression showed that they are located near transposable elements, whereas those in protein-coding sequences are mostly found in membrane-associated and alternative splicing-related genes.
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Affiliation(s)
- Artem Nedoluzhko
- Paleogenomics Laboratory, European University at Saint Petersburg, Saint Petersburg, Russia
- Limited Liability Company ELGENE, Moscow, Russia
| | - Fedor Sharko
- Limited Liability Company ELGENE, Moscow, Russia
- Laboratory of Vertebrate Genomics and Epigenomics, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, Russia
- Laboratory of Bioinformatics and Big Data Analysis, Kurchatov Center for Genomic Research, National Research Center “Kurchatov Institute”, Moscow, Russia
| | - Svetlana Tsygankova
- Laboratory of Eukaryotic Genomics, Kurchatov Center for Genomic Research, National Research Center “Kurchatov Institute”, Moscow, Russia
| | - Eugenia Boulygina
- Laboratory of Eukaryotic Genomics, Kurchatov Center for Genomic Research, National Research Center “Kurchatov Institute”, Moscow, Russia
| | - Natalia Slobodova
- Laboratory of Eukaryotic Genomics, Kurchatov Center for Genomic Research, National Research Center “Kurchatov Institute”, Moscow, Russia
| | - Anton Teslyuk
- National Research Center “Kurchatov Institute”, Moscow, Russia
| | - Jorge Galindo-Villegas
- Faculty of Biosciences and Aquaculture, Nord University, Bodø, Norway
- *Correspondence: Jorge Galindo-Villegas, ; Sergey Rastorguev,
| | - Sergey Rastorguev
- Limited Liability Company ELGENE, Moscow, Russia
- Laboratory of Bioinformatics and Big Data Analysis, Kurchatov Center for Genomic Research, National Research Center “Kurchatov Institute”, Moscow, Russia
- *Correspondence: Jorge Galindo-Villegas, ; Sergey Rastorguev,
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