Comparative cytogenetic analyses in Ancistrus species (Siluriformes: Loricariidae)

Detalhes bibliográficos
Autor(a) principal: Glugoski,Larissa
Data de Publicação: 2020
Outros Autores: Deon,Geize, Schott,Stephane, Vicari,Marcelo R., Nogaroto,Viviane, Moreira-Filho,Orlando
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Neotropical ichthyology (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000200217
Resumo: ABSTRACT Ancistrus is a specious genus of armored catfishes that has been extensively used for cytogenetic studies in the last 17 years. A comparison of the extensive karyotypic plasticity within this genus is presented with new cytogenetic analysis for Ancistrus cf. multispinis and Ancistrus aguaboensis. This study aims to improve our understanding of chromosomal evolution associated with changes in the diploid number (2n) and the dispersion of ribosomal DNAs (rDNAs) within Ancistrus. Ancistrus cf. multispinis and A. aguaboensis exhibit 2n of 52 and 50 chromosomes, respectively. Given that A. cf. multispinis shares a 2n = 52 also found in Pterygoplichthyini, the sister group for Ancistrini, a Robertsonian (Rb) fusion event is proposed for the 2n reduction in A. aguaboensis. 5S rDNAs pseudogenes sites have already been associated with Rb fusion in Ancistrus and our analysis suggests that the 2n reduction in A. aguaboensis was triggered by double strand breaks (DSBs) and chromosomal rearrangements at 5S rDNA sites. The presence of evolutionary breakpoint regions (EBRs) into rDNA cluster is proposed to explain part of the Rb fusion in Ancistrus. Cytogenetic data presented extends the diversity already documented in Ancistrus to further understand the role of chromosomal rearrangements in the diversification of Ancistrini.
id SBI-1_4fd5ddc7a6469911be4ff38e880d0371
oai_identifier_str oai:scielo:S1679-62252020000200217
network_acronym_str SBI-1
network_name_str Neotropical ichthyology (Online)
repository_id_str
spelling Comparative cytogenetic analyses in Ancistrus species (Siluriformes: Loricariidae)Armored catfishFISH5S rDNA18S rDNAtelomeric sequenceABSTRACT Ancistrus is a specious genus of armored catfishes that has been extensively used for cytogenetic studies in the last 17 years. A comparison of the extensive karyotypic plasticity within this genus is presented with new cytogenetic analysis for Ancistrus cf. multispinis and Ancistrus aguaboensis. This study aims to improve our understanding of chromosomal evolution associated with changes in the diploid number (2n) and the dispersion of ribosomal DNAs (rDNAs) within Ancistrus. Ancistrus cf. multispinis and A. aguaboensis exhibit 2n of 52 and 50 chromosomes, respectively. Given that A. cf. multispinis shares a 2n = 52 also found in Pterygoplichthyini, the sister group for Ancistrini, a Robertsonian (Rb) fusion event is proposed for the 2n reduction in A. aguaboensis. 5S rDNAs pseudogenes sites have already been associated with Rb fusion in Ancistrus and our analysis suggests that the 2n reduction in A. aguaboensis was triggered by double strand breaks (DSBs) and chromosomal rearrangements at 5S rDNA sites. The presence of evolutionary breakpoint regions (EBRs) into rDNA cluster is proposed to explain part of the Rb fusion in Ancistrus. Cytogenetic data presented extends the diversity already documented in Ancistrus to further understand the role of chromosomal rearrangements in the diversification of Ancistrini.Sociedade Brasileira de Ictiologia2020-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000200217Neotropical Ichthyology v.18 n.2 2020reponame:Neotropical ichthyology (Online)instname:Sociedade Brasileira de Ictiologia (SBI)instacron:SBI10.1590/1982-0224-2020-0013info:eu-repo/semantics/openAccessGlugoski,LarissaDeon,GeizeSchott,StephaneVicari,Marcelo R.Nogaroto,VivianeMoreira-Filho,Orlandoeng2020-07-02T00:00:00Zoai:scielo:S1679-62252020000200217Revistahttp://www.ufrgs.br/ni/https://old.scielo.br/oai/scielo-oai.php||neoichth@nupelia.uem.br1982-02241679-6225opendoar:2020-07-02T00:00Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI)false
dc.title.none.fl_str_mv Comparative cytogenetic analyses in Ancistrus species (Siluriformes: Loricariidae)
title Comparative cytogenetic analyses in Ancistrus species (Siluriformes: Loricariidae)
spellingShingle Comparative cytogenetic analyses in Ancistrus species (Siluriformes: Loricariidae)
Glugoski,Larissa
Armored catfish
FISH
5S rDNA
18S rDNA
telomeric sequence
title_short Comparative cytogenetic analyses in Ancistrus species (Siluriformes: Loricariidae)
title_full Comparative cytogenetic analyses in Ancistrus species (Siluriformes: Loricariidae)
title_fullStr Comparative cytogenetic analyses in Ancistrus species (Siluriformes: Loricariidae)
title_full_unstemmed Comparative cytogenetic analyses in Ancistrus species (Siluriformes: Loricariidae)
title_sort Comparative cytogenetic analyses in Ancistrus species (Siluriformes: Loricariidae)
author Glugoski,Larissa
author_facet Glugoski,Larissa
Deon,Geize
Schott,Stephane
Vicari,Marcelo R.
Nogaroto,Viviane
Moreira-Filho,Orlando
author_role author
author2 Deon,Geize
Schott,Stephane
Vicari,Marcelo R.
Nogaroto,Viviane
Moreira-Filho,Orlando
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Glugoski,Larissa
Deon,Geize
Schott,Stephane
Vicari,Marcelo R.
Nogaroto,Viviane
Moreira-Filho,Orlando
dc.subject.por.fl_str_mv Armored catfish
FISH
5S rDNA
18S rDNA
telomeric sequence
topic Armored catfish
FISH
5S rDNA
18S rDNA
telomeric sequence
description ABSTRACT Ancistrus is a specious genus of armored catfishes that has been extensively used for cytogenetic studies in the last 17 years. A comparison of the extensive karyotypic plasticity within this genus is presented with new cytogenetic analysis for Ancistrus cf. multispinis and Ancistrus aguaboensis. This study aims to improve our understanding of chromosomal evolution associated with changes in the diploid number (2n) and the dispersion of ribosomal DNAs (rDNAs) within Ancistrus. Ancistrus cf. multispinis and A. aguaboensis exhibit 2n of 52 and 50 chromosomes, respectively. Given that A. cf. multispinis shares a 2n = 52 also found in Pterygoplichthyini, the sister group for Ancistrini, a Robertsonian (Rb) fusion event is proposed for the 2n reduction in A. aguaboensis. 5S rDNAs pseudogenes sites have already been associated with Rb fusion in Ancistrus and our analysis suggests that the 2n reduction in A. aguaboensis was triggered by double strand breaks (DSBs) and chromosomal rearrangements at 5S rDNA sites. The presence of evolutionary breakpoint regions (EBRs) into rDNA cluster is proposed to explain part of the Rb fusion in Ancistrus. Cytogenetic data presented extends the diversity already documented in Ancistrus to further understand the role of chromosomal rearrangements in the diversification of Ancistrini.
publishDate 2020
dc.date.none.fl_str_mv 2020-01-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000200217
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000200217
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/1982-0224-2020-0013
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Ictiologia
publisher.none.fl_str_mv Sociedade Brasileira de Ictiologia
dc.source.none.fl_str_mv Neotropical Ichthyology v.18 n.2 2020
reponame:Neotropical ichthyology (Online)
instname:Sociedade Brasileira de Ictiologia (SBI)
instacron:SBI
instname_str Sociedade Brasileira de Ictiologia (SBI)
instacron_str SBI
institution SBI
reponame_str Neotropical ichthyology (Online)
collection Neotropical ichthyology (Online)
repository.name.fl_str_mv Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI)
repository.mail.fl_str_mv ||neoichth@nupelia.uem.br
_version_ 1752122183221510144