Three sympatric karyomorphs in the fish Astyanax fasciatus (Teleostei, Characidae) do not seem to hybridize in natural populations
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.3897/CompCytogen.v6i1.2151 http://hdl.handle.net/11449/226826 |
Resumo: | Ninety individuals of the characid fish Astyanax fasciatus (Cuvier, 1819) were collected at Água da Madalena stream (Botucatu, São Paulo, Brazil) and analyzed for diploid chromosome number 2n and karyotype composition as well as for the chromosomal location of the 5S and 18S ribosomal DNA (rDNA). Whereas no chromosome differences were associated with sex, three different karyomorphs with diploid chromosome numbers 2n=46, 2n=48 and 2n=50 were found. No intermediate 2n numbers were discovered. The 2n=50 karyomorph showed some differences in 18S rDNA location compared to the two other karyomorphs. Finally, all specimens with the 2n=46 karyomorph showed the presence of a partly heterochromatic macro supernumerary chromosome, which was absent in all individuals with the two other karyomorphs. All these results suggest that indviduals of the three different karyomorphs are not likely to hybridize in the examined populations. Our findings strongly suggest the presence of three separate species (sensu biological species concept) easily diagnosed on the basis of differences in the diploid chromosome numbers and other chromosomal markers. © Maressa Ferreira-Neto et al. |
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Three sympatric karyomorphs in the fish Astyanax fasciatus (Teleostei, Characidae) do not seem to hybridize in natural populationsB chromosomeChromosome bandingFish cytogeneticsRdnaSympatric differentiationNinety individuals of the characid fish Astyanax fasciatus (Cuvier, 1819) were collected at Água da Madalena stream (Botucatu, São Paulo, Brazil) and analyzed for diploid chromosome number 2n and karyotype composition as well as for the chromosomal location of the 5S and 18S ribosomal DNA (rDNA). Whereas no chromosome differences were associated with sex, three different karyomorphs with diploid chromosome numbers 2n=46, 2n=48 and 2n=50 were found. No intermediate 2n numbers were discovered. The 2n=50 karyomorph showed some differences in 18S rDNA location compared to the two other karyomorphs. Finally, all specimens with the 2n=46 karyomorph showed the presence of a partly heterochromatic macro supernumerary chromosome, which was absent in all individuals with the two other karyomorphs. All these results suggest that indviduals of the three different karyomorphs are not likely to hybridize in the examined populations. Our findings strongly suggest the presence of three separate species (sensu biological species concept) easily diagnosed on the basis of differences in the diploid chromosome numbers and other chromosomal markers. © Maressa Ferreira-Neto et al.Departmento de Morfologia Instituto de Biociências Universidade Estadual Paulista Distrito de Rubião Jr, Botucatu, São PauloDepartamento de Biologia Estrutural Molecular e Genética Universidade Estadual de Ponta Grossa, ParanáPrograma de Pós-Graduação em Genética e Evolução Universidade Federal de São Carlos, São CarlosDepartamento de Genética Universidad de Granada, 18071 GranadaDepartmento de Morfologia Instituto de Biociências Universidade Estadual Paulista Distrito de Rubião Jr, Botucatu, São PauloUniversidade Estadual Paulista (UNESP)Universidade Estadual de Ponta Grossa (UEPG)Universidade Federal de São Carlos (UFSCar)Universidad de GranadaFerreira-Neto, Maressa [UNESP]Artoni, Roberto FerreiraVicari, Marcelo RicardoMoreira-Filho, OrlandoCamacho, Juan Pedro MartínezBakkali, Mohammedde Oliveira, Claudio [UNESP]Foresti, Fausto [UNESP]2022-04-29T02:57:14Z2022-04-29T02:57:14Z2012-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article29-40http://dx.doi.org/10.3897/CompCytogen.v6i1.2151Comparative Cytogenetics, v. 6, n. 1, p. 29-40, 2012.1993-078X1993-0771http://hdl.handle.net/11449/22682610.3897/CompCytogen.v6i1.21512-s2.0-84861467292Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengComparative Cytogeneticsinfo:eu-repo/semantics/openAccess2022-04-29T02:57:14Zoai:repositorio.unesp.br:11449/226826Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-29T02:57:14Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Three sympatric karyomorphs in the fish Astyanax fasciatus (Teleostei, Characidae) do not seem to hybridize in natural populations |
title |
Three sympatric karyomorphs in the fish Astyanax fasciatus (Teleostei, Characidae) do not seem to hybridize in natural populations |
spellingShingle |
Three sympatric karyomorphs in the fish Astyanax fasciatus (Teleostei, Characidae) do not seem to hybridize in natural populations Ferreira-Neto, Maressa [UNESP] B chromosome Chromosome banding Fish cytogenetics Rdna Sympatric differentiation |
title_short |
Three sympatric karyomorphs in the fish Astyanax fasciatus (Teleostei, Characidae) do not seem to hybridize in natural populations |
title_full |
Three sympatric karyomorphs in the fish Astyanax fasciatus (Teleostei, Characidae) do not seem to hybridize in natural populations |
title_fullStr |
Three sympatric karyomorphs in the fish Astyanax fasciatus (Teleostei, Characidae) do not seem to hybridize in natural populations |
title_full_unstemmed |
Three sympatric karyomorphs in the fish Astyanax fasciatus (Teleostei, Characidae) do not seem to hybridize in natural populations |
title_sort |
Three sympatric karyomorphs in the fish Astyanax fasciatus (Teleostei, Characidae) do not seem to hybridize in natural populations |
author |
Ferreira-Neto, Maressa [UNESP] |
author_facet |
Ferreira-Neto, Maressa [UNESP] Artoni, Roberto Ferreira Vicari, Marcelo Ricardo Moreira-Filho, Orlando Camacho, Juan Pedro Martínez Bakkali, Mohammed de Oliveira, Claudio [UNESP] Foresti, Fausto [UNESP] |
author_role |
author |
author2 |
Artoni, Roberto Ferreira Vicari, Marcelo Ricardo Moreira-Filho, Orlando Camacho, Juan Pedro Martínez Bakkali, Mohammed de Oliveira, Claudio [UNESP] Foresti, Fausto [UNESP] |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Universidade Estadual de Ponta Grossa (UEPG) Universidade Federal de São Carlos (UFSCar) Universidad de Granada |
dc.contributor.author.fl_str_mv |
Ferreira-Neto, Maressa [UNESP] Artoni, Roberto Ferreira Vicari, Marcelo Ricardo Moreira-Filho, Orlando Camacho, Juan Pedro Martínez Bakkali, Mohammed de Oliveira, Claudio [UNESP] Foresti, Fausto [UNESP] |
dc.subject.por.fl_str_mv |
B chromosome Chromosome banding Fish cytogenetics Rdna Sympatric differentiation |
topic |
B chromosome Chromosome banding Fish cytogenetics Rdna Sympatric differentiation |
description |
Ninety individuals of the characid fish Astyanax fasciatus (Cuvier, 1819) were collected at Água da Madalena stream (Botucatu, São Paulo, Brazil) and analyzed for diploid chromosome number 2n and karyotype composition as well as for the chromosomal location of the 5S and 18S ribosomal DNA (rDNA). Whereas no chromosome differences were associated with sex, three different karyomorphs with diploid chromosome numbers 2n=46, 2n=48 and 2n=50 were found. No intermediate 2n numbers were discovered. The 2n=50 karyomorph showed some differences in 18S rDNA location compared to the two other karyomorphs. Finally, all specimens with the 2n=46 karyomorph showed the presence of a partly heterochromatic macro supernumerary chromosome, which was absent in all individuals with the two other karyomorphs. All these results suggest that indviduals of the three different karyomorphs are not likely to hybridize in the examined populations. Our findings strongly suggest the presence of three separate species (sensu biological species concept) easily diagnosed on the basis of differences in the diploid chromosome numbers and other chromosomal markers. © Maressa Ferreira-Neto et al. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-01-01 2022-04-29T02:57:14Z 2022-04-29T02:57:14Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.3897/CompCytogen.v6i1.2151 Comparative Cytogenetics, v. 6, n. 1, p. 29-40, 2012. 1993-078X 1993-0771 http://hdl.handle.net/11449/226826 10.3897/CompCytogen.v6i1.2151 2-s2.0-84861467292 |
url |
http://dx.doi.org/10.3897/CompCytogen.v6i1.2151 http://hdl.handle.net/11449/226826 |
identifier_str_mv |
Comparative Cytogenetics, v. 6, n. 1, p. 29-40, 2012. 1993-078X 1993-0771 10.3897/CompCytogen.v6i1.2151 2-s2.0-84861467292 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Comparative Cytogenetics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
29-40 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799964754631983104 |