Comparative cytogenetic and allozyme analysis of Mugil rubrioculus and M. curema (Teleostei : Mugilidae) from Venezuela
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | spa |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://www.scielo.org.ve/scielo.php?pid=S0378-18442007001100008&script=sci_arttext http://hdl.handle.net/11449/30933 |
Resumo: | A comparative cytogenetic and allozyme analysis of sympatric specimens of Mugil rubrioculus and M. curema from Venezuela is reported. Specimens of M. rubrioculus exhibit a 2n=48 karyotype with exclusively acrocentric (NF=48) chromosomes, one pair of NORs interstitially located on chromosome pair number 8 and constitutive heterochromatin distributed in pericentromeric position of all chromosomes. Specimens of M. curema show cytogenetic features significantly different in comparison to M. rubrioculus in terms of chromosome number and morphology (2n=24 biarmed chromosomes, NF=48) and NORs location (telomeric region of the largest metacentric pair). Starch gel electrophoresis analysis at 20 presumptive loci reveals a reduced genetic difterentiation between the two species. In fact, though a total of ten private alleles are identified; all loci share alleles between the two species and the obtained Nei's genetic distance (D= 0.060) is lower than the values obtained between other congeneric mullet species. Thus, the cytogenetic and allozyme data sets indicate quite different degrees of genetic divergence between M. rubrioculus and M. curema. This could either reflect an underestimate of molecular divergence owing to cryptic variation or different rates of molecular/chromosomal evolution. Whatever the explanation, this study confirms the power of karyological data in discriminating species of Mugilidae. |
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Comparative cytogenetic and allozyme analysis of Mugil rubrioculus and M. curema (Teleostei : Mugilidae) from VenezuelaA comparative cytogenetic and allozyme analysis of sympatric specimens of Mugil rubrioculus and M. curema from Venezuela is reported. Specimens of M. rubrioculus exhibit a 2n=48 karyotype with exclusively acrocentric (NF=48) chromosomes, one pair of NORs interstitially located on chromosome pair number 8 and constitutive heterochromatin distributed in pericentromeric position of all chromosomes. Specimens of M. curema show cytogenetic features significantly different in comparison to M. rubrioculus in terms of chromosome number and morphology (2n=24 biarmed chromosomes, NF=48) and NORs location (telomeric region of the largest metacentric pair). Starch gel electrophoresis analysis at 20 presumptive loci reveals a reduced genetic difterentiation between the two species. In fact, though a total of ten private alleles are identified; all loci share alleles between the two species and the obtained Nei's genetic distance (D= 0.060) is lower than the values obtained between other congeneric mullet species. Thus, the cytogenetic and allozyme data sets indicate quite different degrees of genetic divergence between M. rubrioculus and M. curema. This could either reflect an underestimate of molecular divergence owing to cryptic variation or different rates of molecular/chromosomal evolution. Whatever the explanation, this study confirms the power of karyological data in discriminating species of Mugilidae.Univ Oriente, Escuelas Ciências Aplicadas Mar, Margarita, VenezuelaUniv Estadual Paulista, Inst Biociencias, Botucatu, SP, BrazilUniv Southampton, Inst Oceanografico, Southampton SO9 5NH, Hants, EnglandAuburn Univ, Auburn, AL 36849 USAUniv Bristol, Bristol BS8 1TH, Avon, EnglandUniv Bristol, Amer Museum Nat Hist, New York, NY USAUniv Roma La Sapienza, La Sapeinza, ItalyUniv Estadual Paulista, Inst Biociencias, Botucatu, SP, BrazilIntercienciaUniv OrienteUniversidade Estadual Paulista (Unesp)Univ SouthamptonAuburn UnivUniv BristolUniv Roma La SapienzaNirchio, MauroOliveira, Claudio [UNESP]Ferreira, Irani A. [UNESP]Perez, Julio E.Gaviria, Juan I.Harrison, IanRossi, Anna RitaSola, Luciana2014-05-20T15:19:27Z2014-05-20T15:19:27Z2007-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article757-762application/pdfhttp://www.scielo.org.ve/scielo.php?pid=S0378-18442007001100008&script=sci_arttextInterciencia. Caracas: Interciencia, v. 32, n. 11, p. 757-762, 2007.0378-1844http://hdl.handle.net/11449/30933S0378-18442007001100008WOS:0002513408000062-s2.0-37249058291WOS000251340800006.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPspaInterciencia0.2580,183info:eu-repo/semantics/openAccess2024-01-28T06:44:55Zoai:repositorio.unesp.br:11449/30933Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-06T00:07:26.893977Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Comparative cytogenetic and allozyme analysis of Mugil rubrioculus and M. curema (Teleostei : Mugilidae) from Venezuela |
title |
Comparative cytogenetic and allozyme analysis of Mugil rubrioculus and M. curema (Teleostei : Mugilidae) from Venezuela |
spellingShingle |
Comparative cytogenetic and allozyme analysis of Mugil rubrioculus and M. curema (Teleostei : Mugilidae) from Venezuela Nirchio, Mauro |
title_short |
Comparative cytogenetic and allozyme analysis of Mugil rubrioculus and M. curema (Teleostei : Mugilidae) from Venezuela |
title_full |
Comparative cytogenetic and allozyme analysis of Mugil rubrioculus and M. curema (Teleostei : Mugilidae) from Venezuela |
title_fullStr |
Comparative cytogenetic and allozyme analysis of Mugil rubrioculus and M. curema (Teleostei : Mugilidae) from Venezuela |
title_full_unstemmed |
Comparative cytogenetic and allozyme analysis of Mugil rubrioculus and M. curema (Teleostei : Mugilidae) from Venezuela |
title_sort |
Comparative cytogenetic and allozyme analysis of Mugil rubrioculus and M. curema (Teleostei : Mugilidae) from Venezuela |
author |
Nirchio, Mauro |
author_facet |
Nirchio, Mauro Oliveira, Claudio [UNESP] Ferreira, Irani A. [UNESP] Perez, Julio E. Gaviria, Juan I. Harrison, Ian Rossi, Anna Rita Sola, Luciana |
author_role |
author |
author2 |
Oliveira, Claudio [UNESP] Ferreira, Irani A. [UNESP] Perez, Julio E. Gaviria, Juan I. Harrison, Ian Rossi, Anna Rita Sola, Luciana |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Univ Oriente Universidade Estadual Paulista (Unesp) Univ Southampton Auburn Univ Univ Bristol Univ Roma La Sapienza |
dc.contributor.author.fl_str_mv |
Nirchio, Mauro Oliveira, Claudio [UNESP] Ferreira, Irani A. [UNESP] Perez, Julio E. Gaviria, Juan I. Harrison, Ian Rossi, Anna Rita Sola, Luciana |
description |
A comparative cytogenetic and allozyme analysis of sympatric specimens of Mugil rubrioculus and M. curema from Venezuela is reported. Specimens of M. rubrioculus exhibit a 2n=48 karyotype with exclusively acrocentric (NF=48) chromosomes, one pair of NORs interstitially located on chromosome pair number 8 and constitutive heterochromatin distributed in pericentromeric position of all chromosomes. Specimens of M. curema show cytogenetic features significantly different in comparison to M. rubrioculus in terms of chromosome number and morphology (2n=24 biarmed chromosomes, NF=48) and NORs location (telomeric region of the largest metacentric pair). Starch gel electrophoresis analysis at 20 presumptive loci reveals a reduced genetic difterentiation between the two species. In fact, though a total of ten private alleles are identified; all loci share alleles between the two species and the obtained Nei's genetic distance (D= 0.060) is lower than the values obtained between other congeneric mullet species. Thus, the cytogenetic and allozyme data sets indicate quite different degrees of genetic divergence between M. rubrioculus and M. curema. This could either reflect an underestimate of molecular divergence owing to cryptic variation or different rates of molecular/chromosomal evolution. Whatever the explanation, this study confirms the power of karyological data in discriminating species of Mugilidae. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-11-01 2014-05-20T15:19:27Z 2014-05-20T15:19:27Z |
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://www.scielo.org.ve/scielo.php?pid=S0378-18442007001100008&script=sci_arttext Interciencia. Caracas: Interciencia, v. 32, n. 11, p. 757-762, 2007. 0378-1844 http://hdl.handle.net/11449/30933 S0378-18442007001100008 WOS:000251340800006 2-s2.0-37249058291 WOS000251340800006.pdf |
url |
http://www.scielo.org.ve/scielo.php?pid=S0378-18442007001100008&script=sci_arttext http://hdl.handle.net/11449/30933 |
identifier_str_mv |
Interciencia. Caracas: Interciencia, v. 32, n. 11, p. 757-762, 2007. 0378-1844 S0378-18442007001100008 WOS:000251340800006 2-s2.0-37249058291 WOS000251340800006.pdf |
dc.language.iso.fl_str_mv |
spa |
language |
spa |
dc.relation.none.fl_str_mv |
Interciencia 0.258 0,183 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
757-762 application/pdf |
dc.publisher.none.fl_str_mv |
Interciencia |
publisher.none.fl_str_mv |
Interciencia |
dc.source.none.fl_str_mv |
Web of Science 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 |
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1808129586691571712 |