Karyotype, heterochromatin distribution and meiosis of Zabrotes subfasciatus (Bohemann) (Coleoptera: Chrysomelidae, Bruchinae)
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Neotropical entomology (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000500007 |
Resumo: | Zabrotes subfasciatus (Boh.) has been extensively studied in its agronomic and biochemical aspects due to its importance as a damaging insect to leguminous grains during storage. The few cytogenetic studies published on this species yielded conflicting results. In this study, the karyotype was analyzed in order to accurately describe the chromosome C-banding patterns and meiosis. The brain ganglion at the prepupa and the adult and pupal testes were analyzed. All individuals had 26 chromosomes in both brain ganglion and spermatogonic mitotic metaphases. These chromosomes were classified as follows: the 12th pair and the Y chromosome were telocentric; the X chromosome was acrocentric; the 4th and 5th pairs were submetacentric; and the remaining pairs were all metacentric. One of the members of the 5th pair presented a secondary constriction. All chromosomes presented pericentromeric heterochromatin. The large arms of the pairs 5, 9 and X presented heterochromatin. The X chromosome showed to be heteropyknotic throughout the prophase of the first meiotic division. The subphases of prophase I were atypical and meiosis II was rarely identified. Testes of all males showed a few cells; the bivalents were rod-like shaped in metaphase I. Karyological formulae were 2n = 24 + XX in females and 2n = 24 + XYp and either n = 12 + X or n = 12 + Y in males. |
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Karyotype, heterochromatin distribution and meiosis of Zabrotes subfasciatus (Bohemann) (Coleoptera: Chrysomelidae, Bruchinae)InsectaMexican bean weevilchromosomeC-bandingXyp systemZabrotes subfasciatus (Boh.) has been extensively studied in its agronomic and biochemical aspects due to its importance as a damaging insect to leguminous grains during storage. The few cytogenetic studies published on this species yielded conflicting results. In this study, the karyotype was analyzed in order to accurately describe the chromosome C-banding patterns and meiosis. The brain ganglion at the prepupa and the adult and pupal testes were analyzed. All individuals had 26 chromosomes in both brain ganglion and spermatogonic mitotic metaphases. These chromosomes were classified as follows: the 12th pair and the Y chromosome were telocentric; the X chromosome was acrocentric; the 4th and 5th pairs were submetacentric; and the remaining pairs were all metacentric. One of the members of the 5th pair presented a secondary constriction. All chromosomes presented pericentromeric heterochromatin. The large arms of the pairs 5, 9 and X presented heterochromatin. The X chromosome showed to be heteropyknotic throughout the prophase of the first meiotic division. The subphases of prophase I were atypical and meiosis II was rarely identified. Testes of all males showed a few cells; the bivalents were rod-like shaped in metaphase I. Karyological formulae were 2n = 24 + XX in females and 2n = 24 + XYp and either n = 12 + X or n = 12 + Y in males.Sociedade Entomológica do Brasil2008-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000500007Neotropical Entomology v.37 n.5 2008reponame:Neotropical entomology (Online)instname:Sociedade Entomológica do Brasil (SEB)instacron:SEB10.1590/S1519-566X2008000500007info:eu-repo/semantics/openAccessCorrêa,Ronan X.Pompolo,Sílvia G.Santos,Igor S.Silva,Janisete G.Costa,Marco A.eng2008-12-01T00:00:00Zoai:scielo:S1519-566X2008000500007Revistahttp://www.scielo.br/neONGhttps://old.scielo.br/oai/scielo-oai.php||editor@seb.org.br1678-80521519-566Xopendoar:2008-12-01T00:00Neotropical entomology (Online) - Sociedade Entomológica do Brasil (SEB)false |
dc.title.none.fl_str_mv |
Karyotype, heterochromatin distribution and meiosis of Zabrotes subfasciatus (Bohemann) (Coleoptera: Chrysomelidae, Bruchinae) |
title |
Karyotype, heterochromatin distribution and meiosis of Zabrotes subfasciatus (Bohemann) (Coleoptera: Chrysomelidae, Bruchinae) |
spellingShingle |
Karyotype, heterochromatin distribution and meiosis of Zabrotes subfasciatus (Bohemann) (Coleoptera: Chrysomelidae, Bruchinae) Corrêa,Ronan X. Insecta Mexican bean weevil chromosome C-banding Xyp system |
title_short |
Karyotype, heterochromatin distribution and meiosis of Zabrotes subfasciatus (Bohemann) (Coleoptera: Chrysomelidae, Bruchinae) |
title_full |
Karyotype, heterochromatin distribution and meiosis of Zabrotes subfasciatus (Bohemann) (Coleoptera: Chrysomelidae, Bruchinae) |
title_fullStr |
Karyotype, heterochromatin distribution and meiosis of Zabrotes subfasciatus (Bohemann) (Coleoptera: Chrysomelidae, Bruchinae) |
title_full_unstemmed |
Karyotype, heterochromatin distribution and meiosis of Zabrotes subfasciatus (Bohemann) (Coleoptera: Chrysomelidae, Bruchinae) |
title_sort |
Karyotype, heterochromatin distribution and meiosis of Zabrotes subfasciatus (Bohemann) (Coleoptera: Chrysomelidae, Bruchinae) |
author |
Corrêa,Ronan X. |
author_facet |
Corrêa,Ronan X. Pompolo,Sílvia G. Santos,Igor S. Silva,Janisete G. Costa,Marco A. |
author_role |
author |
author2 |
Pompolo,Sílvia G. Santos,Igor S. Silva,Janisete G. Costa,Marco A. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Corrêa,Ronan X. Pompolo,Sílvia G. Santos,Igor S. Silva,Janisete G. Costa,Marco A. |
dc.subject.por.fl_str_mv |
Insecta Mexican bean weevil chromosome C-banding Xyp system |
topic |
Insecta Mexican bean weevil chromosome C-banding Xyp system |
description |
Zabrotes subfasciatus (Boh.) has been extensively studied in its agronomic and biochemical aspects due to its importance as a damaging insect to leguminous grains during storage. The few cytogenetic studies published on this species yielded conflicting results. In this study, the karyotype was analyzed in order to accurately describe the chromosome C-banding patterns and meiosis. The brain ganglion at the prepupa and the adult and pupal testes were analyzed. All individuals had 26 chromosomes in both brain ganglion and spermatogonic mitotic metaphases. These chromosomes were classified as follows: the 12th pair and the Y chromosome were telocentric; the X chromosome was acrocentric; the 4th and 5th pairs were submetacentric; and the remaining pairs were all metacentric. One of the members of the 5th pair presented a secondary constriction. All chromosomes presented pericentromeric heterochromatin. The large arms of the pairs 5, 9 and X presented heterochromatin. The X chromosome showed to be heteropyknotic throughout the prophase of the first meiotic division. The subphases of prophase I were atypical and meiosis II was rarely identified. Testes of all males showed a few cells; the bivalents were rod-like shaped in metaphase I. Karyological formulae were 2n = 24 + XX in females and 2n = 24 + XYp and either n = 12 + X or n = 12 + Y in males. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-10-01 |
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=S1519-566X2008000500007 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000500007 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1519-566X2008000500007 |
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 Entomológica do Brasil |
publisher.none.fl_str_mv |
Sociedade Entomológica do Brasil |
dc.source.none.fl_str_mv |
Neotropical Entomology v.37 n.5 2008 reponame:Neotropical entomology (Online) instname:Sociedade Entomológica do Brasil (SEB) instacron:SEB |
instname_str |
Sociedade Entomológica do Brasil (SEB) |
instacron_str |
SEB |
institution |
SEB |
reponame_str |
Neotropical entomology (Online) |
collection |
Neotropical entomology (Online) |
repository.name.fl_str_mv |
Neotropical entomology (Online) - Sociedade Entomológica do Brasil (SEB) |
repository.mail.fl_str_mv |
||editor@seb.org.br |
_version_ |
1754820847885877248 |