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Franchini P, Kautt AF, Nater A, Antonini G, Castiglia R, Meyer A, Solano E. Reconstructing the Evolutionary History of Chromosomal Races on Islands: A Genome-Wide Analysis of Natural House Mouse Populations. Mol Biol Evol 2020; 37:2825-2837. [DOI: 10.1093/molbev/msaa118] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
AbstractChromosomal evolution is widely considered to be an important driver of speciation, as karyotypic reorganization can bring about the establishment of reproductive barriers between incipient species. One textbook example for genetic mechanisms of speciation are large-scale chromosomal rearrangements such as Robertsonian (Rb) fusions, a common class of structural variants that can drastically change the recombination landscape by suppressing crossing-over and influence gene expression by altering regulatory networks. Here, we explore the population structure and demographic patterns of a well-known house mouse Rb system in the Aeolian archipelago in Southern Italy using genome-wide data. By analyzing chromosomal regions characterized by different levels of recombination, we trace the evolutionary history of a set of Rb chromosomes occurring in different geographical locations and test whether chromosomal fusions have a single shared origin or occurred multiple times. Using a combination of phylogenetic and population genetic approaches, we find support for multiple, independent origins of three focal Rb chromosomes. The elucidation of the demographic patterns of the mouse populations within the Aeolian archipelago shows that an interplay between fixation of newly formed Rb chromosomes and hybridization events has contributed to shaping their current karyotypic distribution. Overall, our results illustrate that chromosome structure is much more dynamic than anticipated and emphasize the importance of large-scale chromosomal translocations in speciation.
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Affiliation(s)
- Paolo Franchini
- Department of Biology, University of Konstanz, Konstanz, Germany
| | - Andreas F Kautt
- Department of Biology, University of Konstanz, Konstanz, Germany
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA
| | - Alexander Nater
- Department of Biology, University of Konstanz, Konstanz, Germany
| | - Gloria Antonini
- Department of Biology and Biotechnology “Charles Darwin,” “La Sapienza” University of Rome, Rome, Italy
| | - Riccardo Castiglia
- Department of Biology and Biotechnology “Charles Darwin,” “La Sapienza” University of Rome, Rome, Italy
| | - Axel Meyer
- Department of Biology, University of Konstanz, Konstanz, Germany
| | - Emanuela Solano
- Department of Biology and Biotechnology “Charles Darwin,” “La Sapienza” University of Rome, Rome, Italy
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Romanenko SA, Lyapunova EA, Saidov AS, O'Brien PCM, Serdyukova NA, Ferguson-Smith MA, Graphodatsky AS, Bakloushinskaya I. Chromosome Translocations as a Driver of Diversification in Mole Voles Ellobius (Rodentia, Mammalia). Int J Mol Sci 2019; 20:E4466. [PMID: 31510061 PMCID: PMC6769443 DOI: 10.3390/ijms20184466] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 09/04/2019] [Accepted: 09/09/2019] [Indexed: 12/23/2022] Open
Abstract
The involvement of chromosome changes in the initial steps of speciation is controversial. Here we examine diversification trends within the mole voles Ellobius, a group of subterranean rodents. The first description of their chromosome variability was published almost 40 years ago. Studying the G-band structure of chromosomes in numerous individuals revealed subsequent homologous, step-by-step, Robertsonian translocations, which changed diploid numbers from 54 to 30. Here we used a molecular cytogenetic strategy which demonstrates that chromosomal translocations are not always homologous; consequently, karyotypes with the same diploid number can carry different combinations of metacentrics. We further showed that at least three chromosomal forms with 2n = 34 and distinct metacentrics inhabit the Pamir-Alay mountains. Each of these forms independently hybridized with E. tancrei, 2n = 54, forming separate hybrid zones. The chromosomal variations correlate slightly with geographic barriers. Additionally, we confirmed that the emergence of partial or monobrachial homology appeared to be a strong barrier for hybridization in nature, in contradistinction to experiments which we reported earlier. We discuss the possibility of whole arm reciprocal translocations for mole voles. Our findings suggest that chromosomal translocations lead to diversification and speciation.
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Affiliation(s)
- Svetlana A Romanenko
- Institute of Molecular and Cellular Biology, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia.
- Department of Natural Sciences, Novosibirsk State University, 630090 Novosibirsk, Russia.
| | - Elena A Lyapunova
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, 119334 Moscow, Russia.
| | - Abdusattor S Saidov
- Institute of Zoology and Parasitology, Academy of Sciences of Tajikistan, Dushanbe 734025, Tajikistan.
| | - Patricia C M O'Brien
- Cambridge Resource Centre for Comparative Genomics, Department of Veterinary Medicine, University of Cambridge, Cambridge, CB3 0ES, UK
| | - Natalia A Serdyukova
- Institute of Molecular and Cellular Biology, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia.
| | - Malcolm A Ferguson-Smith
- Cambridge Resource Centre for Comparative Genomics, Department of Veterinary Medicine, University of Cambridge, Cambridge, CB3 0ES, UK
| | - Alexander S Graphodatsky
- Institute of Molecular and Cellular Biology, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia.
- Department of Natural Sciences, Novosibirsk State University, 630090 Novosibirsk, Russia.
| | - Irina Bakloushinskaya
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, 119334 Moscow, Russia.
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Britton-Davidian J, Caminade P, Davidian E, Pagès M. Does chromosomal change restrict gene flow between house mouse populations (Mus musculus domesticus)? Evidence from microsatellite polymorphisms. Biol J Linn Soc Lond 2017. [DOI: 10.1093/biolinnean/blx053] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Montgelard C, Catalan J, Britton-Davidian J. Is increased chromosomal diversity in house mice from Lombardy (Italy) congruent with genic divergence? Biol J Linn Soc Lond 2015. [DOI: 10.1111/bij.12739] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Claudine Montgelard
- Laboratoire Biogéographie et Ecologie des Vertébrés; CNRS; Centre d'Ecologie Fonctionnelle et Evolutive (CEFE) UMR 5175; CNRS-Université de Montpellier-Université Paul-Valéry Montpellier-EPHE; 1919 Route de Mende 34293 Montpellier France
| | - Josette Catalan
- Institut des Sciences de l'Evolution de Montpellier; CNRS, IRD, EPHE; Université Montpellier; cc065, Pl. E. Bataillon 34095 Montpellier Cedex 5 France
| | - Janice Britton-Davidian
- Institut des Sciences de l'Evolution de Montpellier; CNRS, IRD, EPHE; Université Montpellier; cc065, Pl. E. Bataillon 34095 Montpellier Cedex 5 France
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