Abnormal spindle orientation during microsporogenesis in an interspecific Brachiaria (Gramineae) hybrid

Detalhes bibliográficos
Autor(a) principal: Mendes-Bonato,Andréa Beatriz
Data de Publicação: 2006
Outros Autores: Pagliarini,Maria Suely, Valle,Cacilda Borges do
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Genetics and Molecular Biology
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100023
Resumo: This paper reports a case of abnormal spindle orientation during microsporogenesis in an interspecific hybrid of the tropical grass Brachiaria. In the affected plant, prophase I was normal. In metaphase I, bivalents were regularly co-oriented but distantly positioned and spread over the equatorial plate. In anaphase I, chromosomes failed to converge into focused poles due to parallel spindle fibers. As a consequence, in telophase I, an elongated nucleus or several micronuclei were observed in each pole. In the second division, the behavior was the same, leading to polyads with several micronuclei. A total of 40% of meiotic products were affected. The use of this hybrid in production systems needing good-quality seeds is discussed.
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spelling Abnormal spindle orientation during microsporogenesis in an interspecific Brachiaria (Gramineae) hybridBrachiariainterspecific hybridmeiosisspindle abnormalitytropical grassThis paper reports a case of abnormal spindle orientation during microsporogenesis in an interspecific hybrid of the tropical grass Brachiaria. In the affected plant, prophase I was normal. In metaphase I, bivalents were regularly co-oriented but distantly positioned and spread over the equatorial plate. In anaphase I, chromosomes failed to converge into focused poles due to parallel spindle fibers. As a consequence, in telophase I, an elongated nucleus or several micronuclei were observed in each pole. In the second division, the behavior was the same, leading to polyads with several micronuclei. A total of 40% of meiotic products were affected. The use of this hybrid in production systems needing good-quality seeds is discussed.Sociedade Brasileira de Genética2006-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100023Genetics and Molecular Biology v.29 n.1 2006reponame:Genetics and Molecular Biologyinstname:Sociedade Brasileira de Genética (SBG)instacron:SBG10.1590/S1415-47572006000100023info:eu-repo/semantics/openAccessMendes-Bonato,Andréa BeatrizPagliarini,Maria SuelyValle,Cacilda Borges doeng2006-03-10T00:00:00Zoai:scielo:S1415-47572006000100023Revistahttp://www.gmb.org.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||editor@gmb.org.br1678-46851415-4757opendoar:2006-03-10T00:00Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)false
dc.title.none.fl_str_mv Abnormal spindle orientation during microsporogenesis in an interspecific Brachiaria (Gramineae) hybrid
title Abnormal spindle orientation during microsporogenesis in an interspecific Brachiaria (Gramineae) hybrid
spellingShingle Abnormal spindle orientation during microsporogenesis in an interspecific Brachiaria (Gramineae) hybrid
Mendes-Bonato,Andréa Beatriz
Brachiaria
interspecific hybrid
meiosis
spindle abnormality
tropical grass
title_short Abnormal spindle orientation during microsporogenesis in an interspecific Brachiaria (Gramineae) hybrid
title_full Abnormal spindle orientation during microsporogenesis in an interspecific Brachiaria (Gramineae) hybrid
title_fullStr Abnormal spindle orientation during microsporogenesis in an interspecific Brachiaria (Gramineae) hybrid
title_full_unstemmed Abnormal spindle orientation during microsporogenesis in an interspecific Brachiaria (Gramineae) hybrid
title_sort Abnormal spindle orientation during microsporogenesis in an interspecific Brachiaria (Gramineae) hybrid
author Mendes-Bonato,Andréa Beatriz
author_facet Mendes-Bonato,Andréa Beatriz
Pagliarini,Maria Suely
Valle,Cacilda Borges do
author_role author
author2 Pagliarini,Maria Suely
Valle,Cacilda Borges do
author2_role author
author
dc.contributor.author.fl_str_mv Mendes-Bonato,Andréa Beatriz
Pagliarini,Maria Suely
Valle,Cacilda Borges do
dc.subject.por.fl_str_mv Brachiaria
interspecific hybrid
meiosis
spindle abnormality
tropical grass
topic Brachiaria
interspecific hybrid
meiosis
spindle abnormality
tropical grass
description This paper reports a case of abnormal spindle orientation during microsporogenesis in an interspecific hybrid of the tropical grass Brachiaria. In the affected plant, prophase I was normal. In metaphase I, bivalents were regularly co-oriented but distantly positioned and spread over the equatorial plate. In anaphase I, chromosomes failed to converge into focused poles due to parallel spindle fibers. As a consequence, in telophase I, an elongated nucleus or several micronuclei were observed in each pole. In the second division, the behavior was the same, leading to polyads with several micronuclei. A total of 40% of meiotic products were affected. The use of this hybrid in production systems needing good-quality seeds is discussed.
publishDate 2006
dc.date.none.fl_str_mv 2006-01-01
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=S1415-47572006000100023
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000100023
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1415-47572006000100023
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 Genética
publisher.none.fl_str_mv Sociedade Brasileira de Genética
dc.source.none.fl_str_mv Genetics and Molecular Biology v.29 n.1 2006
reponame:Genetics and Molecular Biology
instname:Sociedade Brasileira de Genética (SBG)
instacron:SBG
instname_str Sociedade Brasileira de Genética (SBG)
instacron_str SBG
institution SBG
reponame_str Genetics and Molecular Biology
collection Genetics and Molecular Biology
repository.name.fl_str_mv Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)
repository.mail.fl_str_mv ||editor@gmb.org.br
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