Abnormal spindle orientation during microsporogenesis in an interspecific Brachiaria (Gramineae) hybrid
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , |
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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Genetics and Molecular Biology |
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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 |
_version_ |
1752122379873550336 |