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The Bunocephalus coracoideus species complex (Siluriformes, Aspredinidae). Signs of a speciation process through chromosomal, genetic and ecological diversity

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Τίτλος: The Bunocephalus coracoideus species complex (Siluriformes, Aspredinidae). Signs of a speciation process through chromosomal, genetic and ecological diversity
Συγγραφείς: Ferreira, Milena, Garcia, Caroline, Matoso, D. A., Jesus, Isac Silva de, Cioffi, Marcelo de Bello, Bertollo, Luiz Antônio Carlos, Zuanon, Jansen, Feldberg, Eliana
Στοιχεία εκδότη: Frontiers in Genetics
Έτος έκδοσης: 2017
Θεματικοί όροι: Dna 18s, Ribosome Dna, Rna 5s, Biodiversity, Bunocephalus Coracoideus, Catfish, Chromosome Analysis, Cytogenetics, Dna Barcoding, Dna Denaturation, Dna Sequence, Evolution, In Situ Hybridization, Fluorescence, Gene Amplification, Genetic Variability, Image Processing, Kidney Cell, Nonhuman, Phylogeny, Polymerase Chain Reaction, Testis
Περιγραφή: Bunocephalus is the most species-rich Aspredinidae genus, corresponding to a monophyletic clade with 13 valid species. However, many species have their classification put in question. Here, we analyzed individuals from four Amazonian populations of Bunocephalus coracoideus by cytogenetic and molecular procedures. The geographic distribution, genetic distances and karyotype data indicate that each population represents an Evolutionary Significant Unit (ESU). Cytogenetic markers showed distinct 2n and karyotype formulas, as well as different numbers and locations of the rDNA sites among ESUs. One of such populations (ESU-D) highlighted an extensive polymorphic condition, with several cytotypes probably due to chromosomal rearrangements and meiotic non-disjunctions. This resulted in several aneuploid karyotypes, which was also supported by the mapping of telomeric sequences. Phylograms based on Maximum Likelihood (ML) and Neighbor Joining (NJ) analyses grouped each ESU on particular highly supported clades, with the estimation of evolutionary divergence indicating values being higher than 3.8-12.3% among them. Our study reveals a huge degree of chromosomal and genetic diversity in B. coracoideus and highly points to the existence of four ESUs in allopatric and sympatric speciation processes. In fact, the high divergences found among the ESUs allowed us to delimitate lineages with taxonomic uncertainties in this nominal species. © 2017 Ferreira, Garcia, Matoso, de Jesus, Cioffi, Bertollo, Zuanon and Feldberg.
Τύπος εγγράφου: article in journal/newspaper
Περιγραφή αρχείου: application/pdf
Γλώσσα: English
Relation: Volume 8, Número SEP; https://repositorio.inpa.gov.br/handle/1/15711
DOI: 10.3389/fgene.2017.00120
Διαθεσιμότητα: https://repositorio.inpa.gov.br/handle/1/15711
https://doi.org/10.3389/fgene.2017.00120
Rights: Attribution-NonCommercial-NoDerivs 3.0 Brazil ; http://creativecommons.org/licenses/by-nc-nd/3.0/br/
Αριθμός Καταχώρησης: edsbas.66E8559F
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  Data: The Bunocephalus coracoideus species complex (Siluriformes, Aspredinidae). Signs of a speciation process through chromosomal, genetic and ecological diversity
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  Data: <searchLink fieldCode="AR" term="%22Ferreira%2C+Milena%22">Ferreira, Milena</searchLink><br /><searchLink fieldCode="AR" term="%22Garcia%2C+Caroline%22">Garcia, Caroline</searchLink><br /><searchLink fieldCode="AR" term="%22Matoso%2C+D%2E+A%2E%22">Matoso, D. A.</searchLink><br /><searchLink fieldCode="AR" term="%22Jesus%2C+Isac+Silva+de%22">Jesus, Isac Silva de</searchLink><br /><searchLink fieldCode="AR" term="%22Cioffi%2C+Marcelo+de+Bello%22">Cioffi, Marcelo de Bello</searchLink><br /><searchLink fieldCode="AR" term="%22Bertollo%2C+Luiz+Antônio+Carlos%22">Bertollo, Luiz Antônio Carlos</searchLink><br /><searchLink fieldCode="AR" term="%22Zuanon%2C+Jansen%22">Zuanon, Jansen</searchLink><br /><searchLink fieldCode="AR" term="%22Feldberg%2C+Eliana%22">Feldberg, Eliana</searchLink>
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  Data: Frontiers in Genetics
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  Data: <searchLink fieldCode="DE" term="%22Dna+18s%22">Dna 18s</searchLink><br /><searchLink fieldCode="DE" term="%22Ribosome+Dna%22">Ribosome Dna</searchLink><br /><searchLink fieldCode="DE" term="%22Rna+5s%22">Rna 5s</searchLink><br /><searchLink fieldCode="DE" term="%22Biodiversity%22">Biodiversity</searchLink><br /><searchLink fieldCode="DE" term="%22Bunocephalus+Coracoideus%22">Bunocephalus Coracoideus</searchLink><br /><searchLink fieldCode="DE" term="%22Catfish%22">Catfish</searchLink><br /><searchLink fieldCode="DE" term="%22Chromosome+Analysis%22">Chromosome Analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Cytogenetics%22">Cytogenetics</searchLink><br /><searchLink fieldCode="DE" term="%22Dna+Barcoding%22">Dna Barcoding</searchLink><br /><searchLink fieldCode="DE" term="%22Dna+Denaturation%22">Dna Denaturation</searchLink><br /><searchLink fieldCode="DE" term="%22Dna+Sequence%22">Dna Sequence</searchLink><br /><searchLink fieldCode="DE" term="%22Evolution%22">Evolution</searchLink><br /><searchLink fieldCode="DE" term="%22In+Situ+Hybridization%22">In Situ Hybridization</searchLink><br /><searchLink fieldCode="DE" term="%22Fluorescence%22">Fluorescence</searchLink><br /><searchLink fieldCode="DE" term="%22Gene+Amplification%22">Gene Amplification</searchLink><br /><searchLink fieldCode="DE" term="%22Genetic+Variability%22">Genetic Variability</searchLink><br /><searchLink fieldCode="DE" term="%22Image+Processing%22">Image Processing</searchLink><br /><searchLink fieldCode="DE" term="%22Kidney+Cell%22">Kidney Cell</searchLink><br /><searchLink fieldCode="DE" term="%22Nonhuman%22">Nonhuman</searchLink><br /><searchLink fieldCode="DE" term="%22Phylogeny%22">Phylogeny</searchLink><br /><searchLink fieldCode="DE" term="%22Polymerase+Chain+Reaction%22">Polymerase Chain Reaction</searchLink><br /><searchLink fieldCode="DE" term="%22Testis%22">Testis</searchLink>
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  Data: Bunocephalus is the most species-rich Aspredinidae genus, corresponding to a monophyletic clade with 13 valid species. However, many species have their classification put in question. Here, we analyzed individuals from four Amazonian populations of Bunocephalus coracoideus by cytogenetic and molecular procedures. The geographic distribution, genetic distances and karyotype data indicate that each population represents an Evolutionary Significant Unit (ESU). Cytogenetic markers showed distinct 2n and karyotype formulas, as well as different numbers and locations of the rDNA sites among ESUs. One of such populations (ESU-D) highlighted an extensive polymorphic condition, with several cytotypes probably due to chromosomal rearrangements and meiotic non-disjunctions. This resulted in several aneuploid karyotypes, which was also supported by the mapping of telomeric sequences. Phylograms based on Maximum Likelihood (ML) and Neighbor Joining (NJ) analyses grouped each ESU on particular highly supported clades, with the estimation of evolutionary divergence indicating values being higher than 3.8-12.3% among them. Our study reveals a huge degree of chromosomal and genetic diversity in B. coracoideus and highly points to the existence of four ESUs in allopatric and sympatric speciation processes. In fact, the high divergences found among the ESUs allowed us to delimitate lineages with taxonomic uncertainties in this nominal species. © 2017 Ferreira, Garcia, Matoso, de Jesus, Cioffi, Bertollo, Zuanon and Feldberg.
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      – SubjectFull: Dna 18s
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