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Perucatti A, Iannuzzi A, Armezzani A, Palmarini M, Iannuzzi L. Comparative Fluorescence In Situ Hybridization (FISH) Mapping of Twenty-Three Endogenous Jaagsiekte Sheep Retrovirus (enJSRVs) in Sheep ( Ovis aries) and River Buffalo ( Bubalus bubalis) Chromosomes. Animals (Basel) 2022; 12:ani12202834. [PMID: 36290220 PMCID: PMC9597706 DOI: 10.3390/ani12202834] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 10/14/2022] [Accepted: 10/17/2022] [Indexed: 11/16/2022] Open
Abstract
Endogenous retroviruses (ERVs) are the remnants of ancient infections of host germline cells, thus representing key tools to study host and viral evolution. Homologous ERV sequences often map at the same genomic locus of different species, indicating that retroviral integration occurred in the genomes of the common ancestors of those species. The genome of domestic sheep (Ovis aries) harbors at least twenty-seven copies of ERVs related to the exogenous and pathogenic Jaagsiekte sheep retrovirus (JSRVs), thus referred to as enJSRVs. Some of these loci are unequally distributed between breeds and individuals of the host species due to polymorphic insertions, thereby representing invaluable tools to trace the evolutionary dynamics of virus populations within their hosts. In this study, we extend the cytogenetic physical maps of sheep and river buffalo by performing fluorescent in situ hybridization (FISH) mapping of twenty-three genetically characterized enJSRVs. Additionally, we report the first comparative FISH mapping of enJSRVs in domestic sheep (2n = 54) and river buffalo (Bubalus bubalis, 2n = 50). Finally, we demonstrate that enJSRV loci are conserved in the homologous chromosomes and chromosome bands of both species. Altogether, our results support the hypothesis that enJSRVs were present in the genomes of both species before they differentiated within the Bovidae family.
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Affiliation(s)
- Angela Perucatti
- National Research Council (CNR), Institute of Animal Production System on Mediterranean Environment (ISPAAM), Piazzale E. Fermi, 1, 80055 Portici, Italy
| | - Alessandra Iannuzzi
- National Research Council (CNR), Institute of Animal Production System on Mediterranean Environment (ISPAAM), Piazzale E. Fermi, 1, 80055 Portici, Italy
- Correspondence: ; Tel.: +39-32-8961-7073
| | - Alessia Armezzani
- MRC-University of Glasgow Centre for Virus Research, 464 Bearsden Road, Glasgow G61-1QH, UK
| | - Massimo Palmarini
- MRC-University of Glasgow Centre for Virus Research, 464 Bearsden Road, Glasgow G61-1QH, UK
| | - Leopoldo Iannuzzi
- National Research Council (CNR), Institute of Animal Production System on Mediterranean Environment (ISPAAM), Piazzale E. Fermi, 1, 80055 Portici, Italy
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Artemov GN, Fedorova VS, Karagodin DA, Brusentsov II, Baricheva EM, Sharakhov IV, Gordeev MI, Sharakhova MV. New Cytogenetic Photomap and Molecular Diagnostics for the Cryptic Species of the Malaria Mosquitoes Anopheles messeae and Anopheles daciae from Eurasia. Insects 2021; 12:835. [PMID: 34564275 PMCID: PMC8465136 DOI: 10.3390/insects12090835] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 09/03/2021] [Accepted: 09/13/2021] [Indexed: 11/17/2022]
Abstract
The Eurasian malaria vector Anopheles messeae is a widely spread and genetically diverse species. Five widespread polymorphic chromosomal inversions were found in natural populations of this mosquito. A cryptic species, Anopheles daciae, was differentiated from An. messeae by the presence of several nucleotide substitutions in the Internal Transcribed Spacer 2 (ITS2) region of ribosomal DNA. However, because of the absence of a high-quality reference cytogenetic map, the inversion polymorphisms in An. daciae and An. messeae remain poorly understood. Moreover, a recently determined heterogeneity in ITS2 in An. daciae questioned the accuracy of the previously used Restriction Fragment Length Polymorphism (RFLP) assay for species diagnostics. In this study, a standard-universal cytogenetic map was constructed based on orcein stained images of chromosomes from salivary glands for population studies of the chromosomal inversions that can be used for both An. messeae and An. daciae. In addition, a new ITS2-RFLP approach for species diagnostics was developed. Both methods were applied to characterize inversion polymorphism in populations of An. messeae and An. daciae from a single location in Western Siberia in Russia. The analysis demonstrates that cryptic species are remarkably different in their frequencies of chromosomal inversion variants. Our study supports previous observations that An. messeae has higher inversion polymorphism in all autosomes than the cryptic species An. daciae.
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Affiliation(s)
- Gleb N. Artemov
- Laboratory of Evolutionary Genomics of Insects, Institute of Cytology and Genetics, 630090 Novosibirsk, Russia; (G.N.A.); (D.A.K.); (I.I.B.); (I.V.S.)
- Department of Genetics and Cell Biology, Tomsk State University, 634050 Tomsk, Russia;
| | - Valentina S. Fedorova
- Department of Genetics and Cell Biology, Tomsk State University, 634050 Tomsk, Russia;
| | - Dmitriy A. Karagodin
- Laboratory of Evolutionary Genomics of Insects, Institute of Cytology and Genetics, 630090 Novosibirsk, Russia; (G.N.A.); (D.A.K.); (I.I.B.); (I.V.S.)
| | - Ilya I. Brusentsov
- Laboratory of Evolutionary Genomics of Insects, Institute of Cytology and Genetics, 630090 Novosibirsk, Russia; (G.N.A.); (D.A.K.); (I.I.B.); (I.V.S.)
| | - Elina M. Baricheva
- Laboratory of Cell Differentiation Mechanisms, Institute of Cytology and Genetics, 630090 Novosibirsk, Russia;
| | - Igor V. Sharakhov
- Laboratory of Evolutionary Genomics of Insects, Institute of Cytology and Genetics, 630090 Novosibirsk, Russia; (G.N.A.); (D.A.K.); (I.I.B.); (I.V.S.)
- Department of Genetics and Cell Biology, Tomsk State University, 634050 Tomsk, Russia;
- Department of Entomology, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Mikhail I. Gordeev
- Department of General Biology and Ecology, Moscow Region State University, 141014 Moscow, Russia;
| | - Maria V. Sharakhova
- Laboratory of Evolutionary Genomics of Insects, Institute of Cytology and Genetics, 630090 Novosibirsk, Russia; (G.N.A.); (D.A.K.); (I.I.B.); (I.V.S.)
- Department of Entomology, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
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Merlo MA, Portela-Bens S, Rodríguez ME, García-Angulo A, Cross I, Arias-Pérez A, García E, Rebordinos L. A Comprehensive Integrated Genetic Map of the Complete Karyotype of Solea senegalensis (Kaup 1858). Genes (Basel) 2020; 12:genes12010049. [PMID: 33396249 PMCID: PMC7824234 DOI: 10.3390/genes12010049] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/24/2020] [Accepted: 12/28/2020] [Indexed: 12/23/2022] Open
Abstract
Solea senegalensis aquaculture production has experienced a great increase in the last decade and, consequently, the genome knowledge of the species is gaining attention. In this sense, obtaining a high-density genome mapping of the species could offer clues to the aquaculture improvement in those aspects not resolved so far. In the present article, a review and new processed data have allowed to obtain a high-density BAC-based cytogenetic map of S. senegalensis beside the analysis of the sequences of such BAC clones to achieve integrative data. A total of 93 BAC clones were used to localize the chromosome complement of the species and 588 genes were annotated, thus almost reaching the 2.5% of the S. senegalensis genome sequences. As a result, important data about its genome organization and evolution were obtained, such as the lesser gene density of the large metacentric pair compared with the other metacentric chromosomes, which supports the theory of a sex proto-chromosome pair. In addition, chromosomes with a high number of linked genes that are conserved, even in distant species, were detected. This kind of result widens the knowledge of this species’ chromosome dynamics and evolution.
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Mendoza MN, Raudsepp T, More MJ, Gutiérrez GA, Ponce de León FA. Cytogenetic Mapping of 35 New Markers in the Alpaca ( Vicugna pacos). Genes (Basel) 2020; 11:E522. [PMID: 32397072 DOI: 10.3390/genes11050522] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 05/05/2020] [Accepted: 05/07/2020] [Indexed: 12/11/2022] Open
Abstract
Alpaca is a camelid species of broad economic, biological and biomedical interest, and an essential part of the cultural and historical heritage of Peru. Recently, efforts have been made to improve knowledge of the alpaca genome, and its genetics and cytogenetics, to develop molecular tools for selection and breeding. Here, we report cytogenetic mapping of 35 new markers to 19 alpaca autosomes and the X chromosome. Twenty-eight markers represent alpaca SNPs, of which 17 are located inside or near protein-coding genes, two are in ncRNA genes and nine are intergenic. The remaining seven markers correspond to candidate genes for fiber characteristics (BMP4, COL1A2, GLI1, SFRP4), coat color (TYR) and development (CHD7, PAX7). The results take the tally of cytogenetically mapped markers in alpaca to 281, covering all 36 autosomes and the sex chromosomes. The new map assignments overall agree with human–camelid conserved synteny data, except for mapping BMP4 to VPA3, suggesting a hitherto unknown homology with HSA14. The findings validate, refine and correct the current alpaca assembly VicPac3.1 by anchoring unassigned sequence scaffolds, and ordering and orienting assigned scaffolds. The study contributes to the improvement in the alpaca reference genome and advances camelid molecular cytogenetics.
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Hoang PNT, Michael TP, Gilbert S, Chu P, Motley ST, Appenroth KJ, Schubert I, Lam E. Generating a high-confidence reference genome map of the Greater Duckweed by integration of cytogenomic, optical mapping, and Oxford Nanopore technologies. Plant J 2018; 96:670-684. [PMID: 30054939 DOI: 10.1111/tpj.14049] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 06/29/2018] [Accepted: 07/06/2018] [Indexed: 06/08/2023]
Abstract
Duckweeds are the fastest growing angiosperms and have the potential to become a new generation of sustainable crops. Although a seed plant, Spirodela polyrhiza clones rarely flower and multiply mainly through vegetative propagation. Whole-genome sequencing using different approaches and clones yielded two reference maps. One for clone 9509, supported in its assembly by optical mapping of single DNA molecules, and one for clone 7498, supported by cytogenetic assignment of 96 fingerprinted bacterial artificial chromosomes (BACs) to its 20 chromosomes. However, these maps differ in the composition of several individual chromosome models. We validated both maps further to resolve these differences and addressed whether they could be due to chromosome rearrangements in different clones. For this purpose, we applied sequential multicolor fluorescence in situ hybridization (mcFISH) to seven S. polyrhiza clones, using 106 BACs that were mapped onto the 39 pseudomolecules for clone 7498. Furthermore we integrated high-depth Oxford Nanopore (ON) sequence data for clone 9509 to validate and revise the previously assembled chromosome models. We found no major structural rearrangements between these seven clones, identified seven chimeric pseudomolecules and Illumina assembly errors in the previous maps, respectively. A new S. polyrhiza genome map with high contiguity was produced with the ON sequence data and genome-wide synteny analysis supported the occurrence of two Whole Genome Duplication events during its evolution. This work generated a high confidence genome map for S. polyrhiza at the chromosome scale, and illustrates the complementarity of independent approaches to produce whole-genome assemblies in the absence of a genetic map.
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Affiliation(s)
- Phuong N T Hoang
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Stadt Seeland, D-06466, Germany
- Dalat University, Lamdong Province, Vietnam
| | | | - Sarah Gilbert
- Department of Plant Biology, Rutgers the State University of New Jersey, New Brunswick, NJ, 08901, USA
| | - Philomena Chu
- Department of Plant Biology, Rutgers the State University of New Jersey, New Brunswick, NJ, 08901, USA
| | | | - Klaus J Appenroth
- Department of Plant Physiology, Matthias-Schleiden-Institute, Friedrich-Schiller- University of Jena, Jena, D-07743, Germany
| | - Ingo Schubert
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Stadt Seeland, D-06466, Germany
| | - Eric Lam
- Department of Plant Biology, Rutgers the State University of New Jersey, New Brunswick, NJ, 08901, USA
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Artemov GN, Stegniy VN, Sharakhova MV, Sharakhov IV. The Development of Cytogenetic Maps for Malaria Mosquitoes. Insects 2018; 9:E121. [PMID: 30227611 DOI: 10.3390/insects9030121] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 09/13/2018] [Accepted: 09/13/2018] [Indexed: 11/20/2022]
Abstract
Anopheline mosquitoes are important vectors of human malaria. Next-generation sequencing opens new opportunities for studies of mosquito genomes to uncover the genetic basis of a Plasmodium transmission. Physical mapping of genome sequences to polytene chromosomes significantly improves reference assemblies. High-resolution cytogenetic maps are essential for anchoring genome sequences to chromosomes as well as for studying breakpoints of chromosome rearrangements and chromatin protein localization. Here we describe a detailed pipeline for the development of high-resolution cytogenetic maps using polytene chromosomes of malaria mosquitoes. We apply this workflow to the refinement of the cytogenetic map developed for Anopheles beklemishevi.
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Unger MF, Sharakhova MV, Harshbarger AJ, Glass P, Collins FH. A standard cytogenetic map of Culex quinquefasciatus polytene chromosomes in application for fine-scale physical mapping. Parasit Vectors 2015; 8:307. [PMID: 26048143 PMCID: PMC4465148 DOI: 10.1186/s13071-015-0912-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 05/20/2015] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Southern house mosquito Culex quinquefasciatus belongs to the C. pipiens cryptic species complex, with global distribution and unclear taxonomy. Mosquitoes of the complex can transmit human and animal pathogens, such as filarial worm, West Nile virus and avian malarial Plasmodium. Physical gene mapping is crucial to understanding genome organization, function, and systematic relationships of cryptic species, and is a basis for developing new vector control strategies. However, physical mapping was not established previously for Culex due to the lack of well-structured polytene chromosomes. METHODS Inbreeding was used to diminish inversion polymorphism and asynapsis of chromosomal homologs. Identification of larvae of the same developmental stage using the shape of imaginal discs allowed achievement of uniformity in chromosomal banding pattern. This together with high-resolution phase-contrast photography enabled the development of a cytogenetic map. Fluorescent in situ hybridization was used for gene mapping. RESULTS A detailed cytogenetic map of C. quinquefasciatus polytene chromosomes was produced. Landmarks for chromosome recognition and cytological boundaries for two inversions were identified. Locations of 23 genes belonging to 16 genomic supercontigs, and 2 cDNA were established. Six supercontigs were oriented and one was found putatively misassembled. The cytogenetic map was linked to the previously developed genetic linkage groups by corresponding positions of 2 genetic markers and 10 supercontigs carrying genetic markers. Polytene chromosomes were numbered according to the genetic linkage groups. CONCLUSIONS This study developed a new standard cytogenetic photomap of the polytene chromosomes for C. quinquefasciatus and was applied for the fine-scale physical mapping. It allowed us to infer chromosomal position of 1333 of annotated genes belonging to 16 genomic supercontigs and find orientation of 6 of these supercontigs; the new cytogenetic and previously developed genetic linkage maps were integrated based on 12 matches. The map will further assist in finding chromosomal position of the medically important and other genes, contributing into improvement of the genome assembly. Better assembled C. quinquefasciatus genome can serve as a reference for studying other vector species of C. pipiens complex and will help to resolve their taxonomic relationships. This, in turn, will contribute into future development of vector and disease control strategies.
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Affiliation(s)
- Maria F Unger
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, USA.
| | - Maria V Sharakhova
- Department of Entomology, Virginia Tech, Blacksburg, VA, USA.
- Laboratory of Evolutionary Cytogenetics, Tomsk State University, 36 Lenina Avenue, Tomsk, 634050, Russia.
| | - Adam J Harshbarger
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, USA.
| | - Patrick Glass
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, USA.
| | - Frank H Collins
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, USA.
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Phillips RB, Park LK, Naish KA. Assignment of Chinook salmon (Oncorhynchus tshawytscha) linkage groups to specific chromosomes reveals a karyotype with multiple rearrangements of the chromosome arms of rainbow trout (Oncorhynchus mykiss). G3 (Bethesda) 2013; 3:2289-95. [PMID: 24170739 DOI: 10.1534/g3.113.008078] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The Chinook salmon genetic linkage groups have been assigned to specific chromosomes using fluorescence in situ hybridization with bacterial artificial chromosome probes containing genetic markers mapped to each linkage group in Chinook salmon and rainbow trout. Comparison of the Chinook salmon chromosome map with that of rainbow trout provides strong evidence for conservation of large syntenic blocks in these species, corresponding to entire chromosome arms in the rainbow trout as expected. In almost every case, the markers were found at approximately the same location on the chromosome arm in each species, suggesting conservation of marker order on the chromosome arms of the two species in most cases. Although theoretically a few centric fissions could convert the karyotype of rainbow trout (2N = 58–64) into that of Chinook salmon (2N = 68) or vice versa, our data suggest that chromosome arms underwent multiple centric fissions and subsequent new centric fusions to form the current karyotypes. The morphology of only approximately one-third of the chromosome pairs have been conserved between the two species.
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Feng J, Liu Z, Cai X, Jan CC. Toward a molecular cytogenetic map for cultivated sunflower (Helianthus annuus L.) by landed BAC/BIBAC clones. G3 (Bethesda) 2013; 3:31-40. [PMID: 23316437 DOI: 10.1534/g3.112.004846] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Accepted: 11/01/2012] [Indexed: 11/18/2022]
Abstract
Conventional karyotypes and various genetic linkage maps have been established in sunflower (Helianthus annuus L., 2n = 34). However, the relationship between linkage groups and individual chromosomes of sunflower remains unknown and has considerable relevance for the sunflower research community. Recently, a set of linkage group-specific bacterial /binary bacterial artificial chromosome (BAC/BIBAC) clones was identified from two complementary BAC and BIBAC libraries constructed for cultivated sunflower cv. HA89. In the present study, we used these linkage group-specific clones (∼100 kb in size) as probes to in situ hybridize to HA89 mitotic chromosomes at metaphase using the BAC- fluorescence in situ hybridization (FISH) technique. Because a characteristic of the sunflower genome is the abundance of repetitive DNA sequences, a high ratio of blocking DNA to probe DNA was applied to hybridization reactions to minimize the background noise. As a result, all sunflower chromosomes were anchored by one or two BAC/BIBAC clones with specific FISH signals. FISH analysis based on tandem repetitive sequences, such as rRNA genes, has been previously reported; however, the BAC-FISH technique developed here using restriction fragment length polymorphism (RFLP)−derived BAC/BIBAC clones as probes to apply genome-wide analysis is new for sunflower. As chromosome-specific cytogenetic markers, the selected BAC/BIBAC clones that encompass the 17 linkage groups provide a valuable tool for identifying sunflower cytogenetic stocks (such as trisomics) and tracking alien chromosomes in interspecific crosses. This work also demonstrates the potential of using a large-insert DNA library for the development of molecular cytogenetic resources.
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Altrock S, Fonsêca A, Pedrosa-Harand A. Chromosome identification in the Andean common bean accession G19833 (Phaseolus vulgaris L., Fabaceae). Genet Mol Biol 2011; 34:459-63. [PMID: 21931520 PMCID: PMC3168188 DOI: 10.1590/s1415-47572011005000029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [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: 12/03/2010] [Accepted: 02/28/2011] [Indexed: 12/01/2022] Open
Abstract
Characterization of all chromosomes of the Andean G19833 bean genotype was carried out by fluorescent in situ hybridization. Eleven single-copy genomic sequences, one for each chromosome, two BACs containing subtelomeric and pericentromeric repeats and the 5S and 45S ribosomal DNA (rDNA) were used as probes. Comparison to the Mesoamerican accession BAT93 showed little divergence, except for additional 45S rDNA sites in four chromosome pairs. Altogether, the results indicated a relative karyotypic stability during the evolution of the Andean and Mesoamerican gene pools of P. vulgaris.
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Affiliation(s)
- Sarah Altrock
- Laboratório de Citogenética Vegetal, Departamento de Botânica, Universidade Federal de Pernambuco, Recife, PE, Brazil
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