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Bell EA, Butler CL, Oliveira C, Marburger S, Yant L, Taylor MI. Transposable element annotation in non-model species: The benefits of species-specific repeat libraries using semi-automated EDTA and DeepTE de novo pipelines. Mol Ecol Resour 2021; 22:823-833. [PMID: 34407282 DOI: 10.1111/1755-0998.13489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 08/12/2021] [Indexed: 11/30/2022]
Abstract
Transposable elements (TEs) are significant genomic components which can be detected either through sequence homology against existing databases or de novo, with the latter potentially reducing the risk of underestimating TE abundance. Here, we describe the semi-automated generation of a de novo TE library using the newly developed EDTA pipeline and DeepTE classifier in a non-model teleost (Corydoras fulleri). Using both genomic and transcriptomic data, we assess this de novo pipeline's performance across four TE based metrics: (i) abundance, (ii) composition, (iii) fragmentation, and (iv) age distributions. We then compare the results to those found when using a curated teleost library (Danio rerio). We identify quantitative differences in these metrics and highlight how TE library choice can have major impacts on TE-based estimates in non-model species.
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Affiliation(s)
- Ellen A Bell
- School of Biological Sciences, University of East Anglia, Norwich, Norfolk, UK
| | | | - Claudio Oliveira
- Department of Structural and Functional Biology, Institute of Biosciences/UNESP, Rua Professor Doutor Antonio Celso Wagner Zanin, Botucatu, São Paulo, Brazil
| | - Sarah Marburger
- Department of Cell and Developmental Biology, John Innes Centre, Norwich, Norfolk, UK
| | - Levi Yant
- Future Food Beacon of Excellence and the School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Martin I Taylor
- School of Biological Sciences, University of East Anglia, Norwich, Norfolk, UK
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Marburger S, Monnahan P, Seear PJ, Martin SH, Koch J, Paajanen P, Bohutínská M, Higgins JD, Schmickl R, Yant L. Interspecific introgression mediates adaptation to whole genome duplication. Nat Commun 2019; 10:5218. [PMID: 31740675 PMCID: PMC6861236 DOI: 10.1038/s41467-019-13159-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 10/24/2019] [Indexed: 01/19/2023] Open
Abstract
Adaptive gene flow is a consequential phenomenon across all kingdoms. Although recognition is increasing, there is no study showing that bidirectional gene flow mediates adaptation at loci that manage core processes. We previously discovered concerted molecular changes among interacting members of the meiotic machinery controlling crossover number upon adaptation to whole-genome duplication (WGD) in Arabidopsis arenosa. Here we conduct a population genomic study to test the hypothesis that adaptation to WGD has been mediated by adaptive gene flow between A. arenosa and A. lyrata. We find that A. lyrata underwent WGD more recently than A. arenosa, suggesting that pre-adapted alleles have rescued nascent A. lyrata, but we also detect gene flow in the opposite direction at functionally interacting loci under the most extreme levels of selection. These data indicate that bidirectional gene flow allowed for survival after WGD, and that the merger of these species is greater than the sum of their parts. Whole genome duplication (WGD) presents new challenges to the establishment of optimal allelic combinations and to the meiotic machinery. Here, the authors show that adaptive gene flow from Arabidopsis arenosa could rescue the nascent A. lyrata from extinction following WGD.
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Affiliation(s)
- Sarah Marburger
- Department of Cell and Developmental Biology, John Innes Centre, Norwich, NR4 7UH, UK
| | - Patrick Monnahan
- Department of Cell and Developmental Biology, John Innes Centre, Norwich, NR4 7UH, UK
| | - Paul J Seear
- Department of Genetics and Genome Biology, University of Leicester, Adrian Building, University Road, Leicester, LE1 7RH, UK
| | - Simon H Martin
- Institute of Evolutionary Biology, University of Edinburgh, Edinburgh, EH9 3FL, UK
| | - Jordan Koch
- Department of Cell and Developmental Biology, John Innes Centre, Norwich, NR4 7UH, UK
| | - Pirita Paajanen
- Department of Cell and Developmental Biology, John Innes Centre, Norwich, NR4 7UH, UK
| | - Magdalena Bohutínská
- Department of Botany, Faculty of Science, Charles University, Benátská 2, 128 01, Prague, Czech Republic.,The Czech Academy of Sciences, Zámek 1, 252 43, Průhonice, Czech Republic
| | - James D Higgins
- Department of Genetics and Genome Biology, University of Leicester, Adrian Building, University Road, Leicester, LE1 7RH, UK
| | - Roswitha Schmickl
- Department of Botany, Faculty of Science, Charles University, Benátská 2, 128 01, Prague, Czech Republic. .,The Czech Academy of Sciences, Zámek 1, 252 43, Průhonice, Czech Republic.
| | - Levi Yant
- Department of Cell and Developmental Biology, John Innes Centre, Norwich, NR4 7UH, UK. .,Future Food Beacon of Excellence and the School of Life Sciences, University of Nottingham, Nottingham, UK.
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Marburger S, Alexandrou MA, Taggart JB, Creer S, Carvalho G, Oliveira C, Taylor MI. Whole genome duplication and transposable element proliferation drive genome expansion in Corydoradinae catfishes. Proc Biol Sci 2019; 285:rspb.2017.2732. [PMID: 29445022 PMCID: PMC5829208 DOI: 10.1098/rspb.2017.2732] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 01/25/2018] [Indexed: 01/12/2023] Open
Abstract
Genome size varies significantly across eukaryotic taxa and the largest changes are typically driven by macro-mutations such as whole genome duplications (WGDs) and proliferation of repetitive elements. These two processes may affect the evolutionary potential of lineages by increasing genetic variation and changing gene expression. Here, we elucidate the evolutionary history and mechanisms underpinning genome size variation in a species-rich group of Neotropical catfishes (Corydoradinae) with extreme variation in genome size—0.6 to 4.4 pg per haploid cell. First, genome size was quantified in 65 species and mapped onto a novel fossil-calibrated phylogeny. Two evolutionary shifts in genome size were identified across the tree—the first between 43 and 49 Ma (95% highest posterior density (HPD) 36.2–68.1 Ma) and the second at approximately 19 Ma (95% HPD 15.3–30.14 Ma). Second, restriction-site-associated DNA (RAD) sequencing was used to identify potential WGD events and quantify transposable element (TE) abundance in different lineages. Evidence of two lineage-scale WGDs was identified across the phylogeny, the first event occurring between 54 and 66 Ma (95% HPD 42.56–99.5 Ma) and the second at 20–30 Ma (95% HPD 15.3–45 Ma) based on haplotype numbers per contig and between 35 and 44 Ma (95% HPD 30.29–64.51 Ma) and 20–30 Ma (95% HPD 15.3–45 Ma) based on SNP read ratios. TE abundance increased considerably in parallel with genome size, with a single TE-family (TC1-IS630-Pogo) showing several increases across the Corydoradinae, with the most recent at 20–30 Ma (95% HPD 15.3–45 Ma) and an older event at 35–44 Ma (95% HPD 30.29–64.51 Ma). We identified signals congruent with two WGD duplication events, as well as an increase in TE abundance across different lineages, making the Corydoradinae an excellent model system to study the effects of WGD and TEs on genome and organismal evolution.
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Affiliation(s)
- Sarah Marburger
- Molecular Ecology and Fisheries Genetics Laboratory, School of Biological Sciences, Bangor University, Deiniol Road, Bangor, Gwynedd LL57 2UW, UK.,School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, UK
| | - Markos A Alexandrou
- Molecular Ecology and Fisheries Genetics Laboratory, School of Biological Sciences, Bangor University, Deiniol Road, Bangor, Gwynedd LL57 2UW, UK.,Wildlands Conservation Science, LLC PO Box 1846, Lompoc, CA 93438, USA
| | - John B Taggart
- Institute of Aquaculture, University of Stirling, Stirling FK9 4LA, UK
| | - Simon Creer
- Molecular Ecology and Fisheries Genetics Laboratory, School of Biological Sciences, Bangor University, Deiniol Road, Bangor, Gwynedd LL57 2UW, UK
| | - Gary Carvalho
- Molecular Ecology and Fisheries Genetics Laboratory, School of Biological Sciences, Bangor University, Deiniol Road, Bangor, Gwynedd LL57 2UW, UK
| | - Claudio Oliveira
- Departamento de Morfologia, Instituto de Biociências/UNESP, Rua Professor Doutor Antonio Celso Wagner Zanin, s/n°18618-689 Botucatu, São Paulo, Brazil
| | - Martin I Taylor
- School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, UK
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Abstract
Evolution has devised countless remarkable solutions to diverse challenges. Understanding the mechanistic basis of these solutions provides insights into how biological systems can be subtly tweaked without maladaptive consequences. The knowledge gained from illuminating these mechanisms is equally important to our understanding of fundamental evolutionary mechanisms as it is to our hopes of developing truly rational plant breeding and synthetic biology. In particular, modern population genomic approaches are proving very powerful in the detection of candidate alleles for mediating consequential adaptations that can be tested functionally. Especially striking are signals gained from contexts involving genetic transfers between populations, closely related species, or indeed between kingdoms. Here we discuss two major classes of these scenarios, adaptive introgression and horizontal gene flow, illustrating discoveries made across kingdoms.
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Affiliation(s)
- Roswitha Schmickl
- Institute of Botany, The Czech Academy of Sciences, Zámek 1, 252 43 Průhonice, Czech Republic
- Department of Botany, Faculty of Science, Charles University in Prague, Benátská 2, 128 01 Prague, Czech Republic
| | - Sarah Marburger
- Department of Cell and Developmental Biology, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, United Kingdom
| | - Sian Bray
- Department of Cell and Developmental Biology, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, United Kingdom
| | - Levi Yant
- Department of Cell and Developmental Biology, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, United Kingdom
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Barth S, Joshi S, Marburger S, Ulrich V, Lindblad A, Ohrwall G, Björneholm O, Hergenhahn U. Observation of resonant interatomic coulombic decay in Ne clusters. J Chem Phys 2007; 122:241102. [PMID: 16035737 DOI: 10.1063/1.1937395] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have measured the electron spectra of Ne clusters after excitation with photon energies around the 2s inner valence threshold. At two photon energies below threshold, a resonantly enhanced surplus of low kinetic-energy electrons is observed. The kinetic energy of the peak does not vary with the photon energy and is slightly larger than the transition energy of Interatomic Coulombic Decay (ICD) above threshold. This leads us to assume that an ICD-like process is present. In analogy to the Auger and the resonant Auger decay this new phenomenon is termed resonant ICD.
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Affiliation(s)
- S Barth
- Max-Planck-Institut für Plasmaphysik, European Atomic Energy Community (EURATOM) Association, Garching, Germany
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Ohrwall G, Tchaplyguine M, Lundwall M, Feifel R, Bergersen H, Rander T, Lindblad A, Schulz J, Peredkov S, Barth S, Marburger S, Hergenhahn U, Svensson S, Björneholm O. Femtosecond interatomic Coulombic decay in free neon clusters: large lifetime differences between surface and bulk. Phys Rev Lett 2004; 93:173401. [PMID: 15525075 DOI: 10.1103/physrevlett.93.173401] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2004] [Indexed: 05/24/2023]
Abstract
A quantitative determination of 2s vacancy lifetimes in surface and bulk atoms of free Ne clusters has been made. While for free atoms the 2s inner-valence hole has a ps lifetime, it reduces to 6+/-1 fs for cluster bulk atoms. For surface atoms, the lifetime is on average longer than 30 fs. The lifetime estimate was obtained from fits of high-resolution photoelectron spectra of Ne clusters. The shortening of the lifetime is attributed to the coordination dependent interatomic Coulombic decay, which is extremely sensitive to internuclear distances.
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Affiliation(s)
- G Ohrwall
- Department of Physics, Uppsala University, Box 530, S-751 21 Uppsala, Sweden.
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Kugeler O, Prümper G, Hentges R, Viefhaus J, Rolles D, Becker U, Marburger S, Hergenhahn U. Intramolecular electron scattering and electron transfer following autoionization in dissociating molecules. Phys Rev Lett 2004; 93:033002. [PMID: 15323819 DOI: 10.1103/physrevlett.93.033002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2004] [Indexed: 05/24/2023]
Abstract
Resonant Auger decay of core-excited molecules during ultrafast dissociation leads to a Doppler shift of the emitted electrons depending on the direction of the electron emission relative to the dissociation axis. We have investigated this process by angle-resolved electron-fragment ion coincidence spectroscopy. Electron energy spectra for selected emission angles for the electron relative to the molecular axis reveal the occurrence of intermolecular electron scattering and electron transfer following the primary emission. These processes amount to approximately 25% of the resonant atomic Auger intensity emitted in the studied transition.
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Affiliation(s)
- O Kugeler
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
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Marburger S, Kugeler O, Hergenhahn U, Möller T. Experimental evidence for interatomic coulombic decay in Ne clusters. Phys Rev Lett 2003; 90:203401. [PMID: 12785891 DOI: 10.1103/physrevlett.90.203401] [Citation(s) in RCA: 152] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2002] [Indexed: 05/24/2023]
Abstract
Electron spectra of photoexcited Ne clusters are shown to display a signal at low kinetic energies that is neither present in the Ne monomer nor at photon energies below the inner-valence 2s threshold. These findings are strong evidence for the existence of interatomic Coulombic decays (ICD), a mechanism that was recently predicted theoretically [Phys. Rev. Lett. 79, 4778 (1997)]]. In ICD, an inner-valence hole state in a weakly bonded system can undergo ultrafast relaxation due to energy transfer to a neighboring atom, followed by electron emission from this neighboring site.
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Affiliation(s)
- S Marburger
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
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