Extensive Chromosomal Reorganization in Apistogramma Fishes (Cichlidae, Cichlinae) Fits the Complex Evolutionary Diversification of the Genus

Costa, Gideão Wagner Werneck Félix da; Cioffi, Marcelo de Bello; Liehr, Thomas; Feldberg, Eliana; Bertollo, Luiz Antônio Carlos; Molina, Wagner Franco

Artigo

Extensive Chromosomal Reorganization in Apistogramma Fishes (Cichlidae, Cichlinae) Fits the Complex Evolutionary Diversification of the Genus

Neotropical cichlid fishes are one of the most diversified and evolutionarily successful species assemblages. Extremely similar forms and intraspecific polychromatism present challenges for the taxonomy of some of these groups. Several species complexes have a largely unknown origin and unresolved e...

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Autor principal:	Costa, Gideão Wagner Werneck Félix da
Outros Autores:	Cioffi, Marcelo de Bello, Liehr, Thomas, Feldberg, Eliana, Bertollo, Luiz Antônio Carlos, Molina, Wagner Franco
Grau:	Artigo
Idioma:	English
Publicado em:	International Journal of Molecular Sciences 2020
Assuntos:	Ribosome Dna Animals Cichlid Genetics Karyotype Evolution, Molecular Nucleotide Repeat Animal Cichlids Ribosomal Dna Evolution, Molecular Karyotype Repetitive Sequences, Nucleic Acid
Acesso em linha:	https://repositorio.inpa.gov.br/handle/1/15507

id	oai:repositorio:1-15507
recordtype	dspace
spelling	oai:repositorio:1-15507 Extensive Chromosomal Reorganization in Apistogramma Fishes (Cichlidae, Cichlinae) Fits the Complex Evolutionary Diversification of the Genus Costa, Gideão Wagner Werneck Félix da Cioffi, Marcelo de Bello Liehr, Thomas Feldberg, Eliana Bertollo, Luiz Antônio Carlos Molina, Wagner Franco Ribosome Dna Animals Cichlid Genetics Karyotype Evolution, Molecular Nucleotide Repeat Animal Cichlids Ribosomal Dna Evolution, Molecular Karyotype Repetitive Sequences, Nucleic Acid Neotropical cichlid fishes are one of the most diversified and evolutionarily successful species assemblages. Extremely similar forms and intraspecific polychromatism present challenges for the taxonomy of some of these groups. Several species complexes have a largely unknown origin and unresolved evolutionary processes. Dwarf cichlids of the genus Apistogramma, comprising more than a hundred species, exhibit intricate taxonomic and biogeographic patterns, with both allopatric and sympatric distributions. However, karyotype evolution and the role of chromosomal changes in Apistogramma are still unknown. In the present study, nine South American Apistogramma species were analyzed using conventional cytogenetic methods and the mapping of repetitive DNA sequences [18S rDNA, 5S rDNA, and (TTAGGG)n] by fluorescence in situ hybridization (FISH). Our results showed that Apistogramma has unique cytogenetic characteristics in relation to closely related groups, such as a reduced 2n and a large number of bi-armed chromosomes. Interspecific patterns revealed a scenario of remarkable karyotypic changes, including a reduction of 2n, the occurrence of B-chromosomes and evolutionary dynamic of rDNA tandem repeats. In addition to the well-known pre-zygotic reproductive isolation, the karyotype reorganization in the genus suggests that chromosomal changes could act as postzygotic barriers in areas where Apistogramma congeners overlap. 2020-05-14T16:32:34Z 2020-05-14T16:32:34Z 2019 Artigo https://repositorio.inpa.gov.br/handle/1/15507 10.3390/ijms20174077 en Volume 20, Número 17 Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ application/pdf International Journal of Molecular Sciences
institution	Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection	INPA-RI
language	English
topic	Ribosome Dna Animals Cichlid Genetics Karyotype Evolution, Molecular Nucleotide Repeat Animal Cichlids Ribosomal Dna Evolution, Molecular Karyotype Repetitive Sequences, Nucleic Acid
spellingShingle	Ribosome Dna Animals Cichlid Genetics Karyotype Evolution, Molecular Nucleotide Repeat Animal Cichlids Ribosomal Dna Evolution, Molecular Karyotype Repetitive Sequences, Nucleic Acid Costa, Gideão Wagner Werneck Félix da Extensive Chromosomal Reorganization in Apistogramma Fishes (Cichlidae, Cichlinae) Fits the Complex Evolutionary Diversification of the Genus
topic_facet	Ribosome Dna Animals Cichlid Genetics Karyotype Evolution, Molecular Nucleotide Repeat Animal Cichlids Ribosomal Dna Evolution, Molecular Karyotype Repetitive Sequences, Nucleic Acid
description	Neotropical cichlid fishes are one of the most diversified and evolutionarily successful species assemblages. Extremely similar forms and intraspecific polychromatism present challenges for the taxonomy of some of these groups. Several species complexes have a largely unknown origin and unresolved evolutionary processes. Dwarf cichlids of the genus Apistogramma, comprising more than a hundred species, exhibit intricate taxonomic and biogeographic patterns, with both allopatric and sympatric distributions. However, karyotype evolution and the role of chromosomal changes in Apistogramma are still unknown. In the present study, nine South American Apistogramma species were analyzed using conventional cytogenetic methods and the mapping of repetitive DNA sequences [18S rDNA, 5S rDNA, and (TTAGGG)n] by fluorescence in situ hybridization (FISH). Our results showed that Apistogramma has unique cytogenetic characteristics in relation to closely related groups, such as a reduced 2n and a large number of bi-armed chromosomes. Interspecific patterns revealed a scenario of remarkable karyotypic changes, including a reduction of 2n, the occurrence of B-chromosomes and evolutionary dynamic of rDNA tandem repeats. In addition to the well-known pre-zygotic reproductive isolation, the karyotype reorganization in the genus suggests that chromosomal changes could act as postzygotic barriers in areas where Apistogramma congeners overlap.
format	Artigo
author	Costa, Gideão Wagner Werneck Félix da
author2	Cioffi, Marcelo de Bello Liehr, Thomas Feldberg, Eliana Bertollo, Luiz Antônio Carlos Molina, Wagner Franco
author2Str	Cioffi, Marcelo de Bello Liehr, Thomas Feldberg, Eliana Bertollo, Luiz Antônio Carlos Molina, Wagner Franco
title	Extensive Chromosomal Reorganization in Apistogramma Fishes (Cichlidae, Cichlinae) Fits the Complex Evolutionary Diversification of the Genus
title_short	Extensive Chromosomal Reorganization in Apistogramma Fishes (Cichlidae, Cichlinae) Fits the Complex Evolutionary Diversification of the Genus
title_full	Extensive Chromosomal Reorganization in Apistogramma Fishes (Cichlidae, Cichlinae) Fits the Complex Evolutionary Diversification of the Genus
title_fullStr	Extensive Chromosomal Reorganization in Apistogramma Fishes (Cichlidae, Cichlinae) Fits the Complex Evolutionary Diversification of the Genus
title_full_unstemmed	Extensive Chromosomal Reorganization in Apistogramma Fishes (Cichlidae, Cichlinae) Fits the Complex Evolutionary Diversification of the Genus
title_sort	extensive chromosomal reorganization in apistogramma fishes (cichlidae, cichlinae) fits the complex evolutionary diversification of the genus
publisher	International Journal of Molecular Sciences
publishDate	2020
url	https://repositorio.inpa.gov.br/handle/1/15507
_version_	1787144698594328576
score	11.653393

Extensive Chromosomal Reorganization in Apistogramma Fishes (Cichlidae, Cichlinae) Fits the Complex Evolutionary Diversification of the Genus

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