Análise filogeográfica de Astyanax scabripinnis (Characiformes, Characidae) da região de Campos do Jordão (SP)

Bibliographic Details
Main Author: Zenatti, Priscila Pini
Publication Date: 2006
Format: Master thesis
Language: por
Source: Repositório Institucional da UFSCAR
Download full: https://repositorio.ufscar.br/handle/ufscar/5429
Summary: The lambaris, which include small Astyanax scabripinnis fish, inhabit the headwaters of small streams, forming well known populational isolates. These populations are possibly inbred, presenting little or no gene flow and reduced size. It is believed that these characteristics have aided the fixation of a pronounced karyotypic variability, contributing to the elevated phenotypic plasticity observed between the populations. Due to these factors, this fish group has received special treatment, since they represent a species complex. However, despite abundant cytogenetic studies and all the attention granted to this group, such a polymorphism has not yet been verified on a molecular level and its phylogeny remains unresolved. The verification of whether the karyotypic variations found between the A. scabripinnis populations of the Campos do Jordão region also exist on a molecular level, the estimate of part of the current phylogenetic relationships between them and, also, the verification of whether there is any relationship between the presence or absence of B chromosomes in this species with the observed haplotypic diversity was possible through the analysis of the intraspecific genetic variation of a part of the mitochondrial cytochrome b. The results corroborate the hypothesis that these populations were in contact prior to the elevation of the Serra da Mantiqueira and that they are currently geographically separated. The phylogenetic relationships between the studied populations are discussed. The absence of evolutionary relationship between the cytochrome b gene and the supernumerary chromosomes of these populations was observed.
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spelling Zenatti, Priscila PiniGaletti Júnior, Pedro Manoelhttp://genos.cnpq.br:12010/dwlattes/owa/prc_imp_cv_int?f_cod=K4783603A4http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=S7707219c585f82-aedf-4896-ba3c-d0eefaeaaa232016-06-02T20:21:17Z2007-08-312016-06-02T20:21:17Z2006-05-19ZENATTI, Priscila Pini. Análise filogeográfica de Astyanax scabripinnis (Characiformes, Characidae) da região de Campos do Jordão (SP).. 2006. 108 f. Dissertação (Mestrado em Ciências Biológicas) - Universidade Federal de São Carlos, São Carlos, 2006.https://repositorio.ufscar.br/handle/ufscar/5429The lambaris, which include small Astyanax scabripinnis fish, inhabit the headwaters of small streams, forming well known populational isolates. These populations are possibly inbred, presenting little or no gene flow and reduced size. It is believed that these characteristics have aided the fixation of a pronounced karyotypic variability, contributing to the elevated phenotypic plasticity observed between the populations. Due to these factors, this fish group has received special treatment, since they represent a species complex. However, despite abundant cytogenetic studies and all the attention granted to this group, such a polymorphism has not yet been verified on a molecular level and its phylogeny remains unresolved. The verification of whether the karyotypic variations found between the A. scabripinnis populations of the Campos do Jordão region also exist on a molecular level, the estimate of part of the current phylogenetic relationships between them and, also, the verification of whether there is any relationship between the presence or absence of B chromosomes in this species with the observed haplotypic diversity was possible through the analysis of the intraspecific genetic variation of a part of the mitochondrial cytochrome b. The results corroborate the hypothesis that these populations were in contact prior to the elevation of the Serra da Mantiqueira and that they are currently geographically separated. The phylogenetic relationships between the studied populations are discussed. The absence of evolutionary relationship between the cytochrome b gene and the supernumerary chromosomes of these populations was observed.A espécie Astyanax scabripinnis, constituída por pequenos peixes, popularmente conhecidos como lambari, são habitantes das cabeceiras de pequenos córregos, formando isolados populacionais já bem conhecidos. Estas populações podem ser endogâmicas, apresentando baixo ou nenhum fluxo gênico e tamanho reduzido. Acredita-se que tais características tenham auxiliado na fixação de acentuada variabilidade cariotípica e morfológica, contribuindo para a elevada plasticidade fenotípica observada entre as diferentes populações. Devido a esses fatores, tem-se dado um tratamento especial para esse grupo de peixes, uma vez que eles representam um complexo de espécies. Porém, apesar dos estudos citogenéticos serem abundantes e de toda atenção voltada para este grupo, tal polimorfismo ainda não foi verificado em nível molecular, sendo sua filogenia ainda uma questão aberta. A partir da análise da variação genética intraespecífica de parte do gene mitocondrial citocromo b, foi possível verificar se as variações cariotípicas encontradas entre as populações de A. scabripinnis da região de Campos do Jordão também existem em nível molecular, bem como estimar parte das relações filogenéticas atuais entre as mesmas. A análise da rede de haplótipos corrobora a hipótese de que estas populações estiveram em contato anteriormente ao soerguimento da Serra da Mantiqueira, e hoje se encontram geograficamente separada. Além disso, foi possível inferir que a população do Lago do Pedalinho, provavelmente esteja sofrendo influencia de ações antrópicas e/ou do efeito fundador. Estudos futuros utilizando um número maior de indivíduos por população permitirão a realização de análise cladística aninhada, e a utilização de marcadores moleculares com taxa evolutiva mais rápida, poderá inferir sobre uma história evolutiva mais recente deste grupo de peixes.Financiadora de Estudos e Projetosapplication/pdfporUniversidade Federal de São CarlosPrograma de Pós-Graduação em Genética Evolutiva e Biologia Molecular - PPGGEvUFSCarBRGenéticaFilogeografiaCitocromo bAstyanax scabripinnisDNA mitocondrialCIENCIAS BIOLOGICAS::GENETICAAnálise filogeográfica de Astyanax scabripinnis (Characiformes, Characidae) da região de Campos do Jordão (SP)info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesis-1-121591697-d537-499e-8a95-46132103682einfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALDissPPZ.pdfapplication/pdf10164746https://repositorio.ufscar.br/bitstream/ufscar/5429/1/DissPPZ.pdf6cb727b1bda5e6495013b55cc249b925MD51THUMBNAILDissPPZ.pdf.jpgDissPPZ.pdf.jpgIM Thumbnailimage/jpeg6670https://repositorio.ufscar.br/bitstream/ufscar/5429/2/DissPPZ.pdf.jpg2657bf95941b2df6f259445fb194a54bMD52ufscar/54292023-09-18 18:31:40.849oai:repositorio.ufscar.br:ufscar/5429Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:31:40Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false
dc.title.por.fl_str_mv Análise filogeográfica de Astyanax scabripinnis (Characiformes, Characidae) da região de Campos do Jordão (SP)
title Análise filogeográfica de Astyanax scabripinnis (Characiformes, Characidae) da região de Campos do Jordão (SP)
spellingShingle Análise filogeográfica de Astyanax scabripinnis (Characiformes, Characidae) da região de Campos do Jordão (SP)
Zenatti, Priscila Pini
Genética
Filogeografia
Citocromo b
Astyanax scabripinnis
DNA mitocondrial
CIENCIAS BIOLOGICAS::GENETICA
title_short Análise filogeográfica de Astyanax scabripinnis (Characiformes, Characidae) da região de Campos do Jordão (SP)
title_full Análise filogeográfica de Astyanax scabripinnis (Characiformes, Characidae) da região de Campos do Jordão (SP)
title_fullStr Análise filogeográfica de Astyanax scabripinnis (Characiformes, Characidae) da região de Campos do Jordão (SP)
title_full_unstemmed Análise filogeográfica de Astyanax scabripinnis (Characiformes, Characidae) da região de Campos do Jordão (SP)
title_sort Análise filogeográfica de Astyanax scabripinnis (Characiformes, Characidae) da região de Campos do Jordão (SP)
author Zenatti, Priscila Pini
author_facet Zenatti, Priscila Pini
author_role author
dc.contributor.authorlattes.por.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=S770721
dc.contributor.author.fl_str_mv Zenatti, Priscila Pini
dc.contributor.advisor1.fl_str_mv Galetti Júnior, Pedro Manoel
dc.contributor.advisor1Lattes.fl_str_mv http://genos.cnpq.br:12010/dwlattes/owa/prc_imp_cv_int?f_cod=K4783603A4
dc.contributor.authorID.fl_str_mv 9c585f82-aedf-4896-ba3c-d0eefaeaaa23
contributor_str_mv Galetti Júnior, Pedro Manoel
dc.subject.por.fl_str_mv Genética
Filogeografia
Citocromo b
Astyanax scabripinnis
DNA mitocondrial
topic Genética
Filogeografia
Citocromo b
Astyanax scabripinnis
DNA mitocondrial
CIENCIAS BIOLOGICAS::GENETICA
dc.subject.cnpq.fl_str_mv CIENCIAS BIOLOGICAS::GENETICA
description The lambaris, which include small Astyanax scabripinnis fish, inhabit the headwaters of small streams, forming well known populational isolates. These populations are possibly inbred, presenting little or no gene flow and reduced size. It is believed that these characteristics have aided the fixation of a pronounced karyotypic variability, contributing to the elevated phenotypic plasticity observed between the populations. Due to these factors, this fish group has received special treatment, since they represent a species complex. However, despite abundant cytogenetic studies and all the attention granted to this group, such a polymorphism has not yet been verified on a molecular level and its phylogeny remains unresolved. The verification of whether the karyotypic variations found between the A. scabripinnis populations of the Campos do Jordão region also exist on a molecular level, the estimate of part of the current phylogenetic relationships between them and, also, the verification of whether there is any relationship between the presence or absence of B chromosomes in this species with the observed haplotypic diversity was possible through the analysis of the intraspecific genetic variation of a part of the mitochondrial cytochrome b. The results corroborate the hypothesis that these populations were in contact prior to the elevation of the Serra da Mantiqueira and that they are currently geographically separated. The phylogenetic relationships between the studied populations are discussed. The absence of evolutionary relationship between the cytochrome b gene and the supernumerary chromosomes of these populations was observed.
publishDate 2006
dc.date.issued.fl_str_mv 2006-05-19
dc.date.available.fl_str_mv 2007-08-31
2016-06-02T20:21:17Z
dc.date.accessioned.fl_str_mv 2016-06-02T20:21:17Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
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dc.identifier.citation.fl_str_mv ZENATTI, Priscila Pini. Análise filogeográfica de Astyanax scabripinnis (Characiformes, Characidae) da região de Campos do Jordão (SP).. 2006. 108 f. Dissertação (Mestrado em Ciências Biológicas) - Universidade Federal de São Carlos, São Carlos, 2006.
dc.identifier.uri.fl_str_mv https://repositorio.ufscar.br/handle/ufscar/5429
identifier_str_mv ZENATTI, Priscila Pini. Análise filogeográfica de Astyanax scabripinnis (Characiformes, Characidae) da região de Campos do Jordão (SP).. 2006. 108 f. Dissertação (Mestrado em Ciências Biológicas) - Universidade Federal de São Carlos, São Carlos, 2006.
url https://repositorio.ufscar.br/handle/ufscar/5429
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dc.publisher.initials.fl_str_mv UFSCar
dc.publisher.country.fl_str_mv BR
publisher.none.fl_str_mv Universidade Federal de São Carlos
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