Chromosome number and microsporogenesis of two accessions of Brachiaria dura Stapf (Poaceae)
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Biota Neotropica |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000200024 |
Resumo: | The two accessions of B. dura analyzed (DU01 and DU02) are hexaploid (2n = 6x = 54), derived from x = 9. Meiotic abnormalities, such as precocious chromosome migration to the poles, laggards and micronuclei, were recorded in low frequency in both accessions. The few multivalent chromosome association at diakinesis and meiotic stability suggested that hexaploidy probably resulted from chromosome doubling. In DU02, chromosome transfer (cytomixis) among meiocytes, involving part or the entire genome was observed. The implication of these findings for the Brachiaria breeding is discussed. |
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Biota Neotropica |
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Chromosome number and microsporogenesis of two accessions of Brachiaria dura Stapf (Poaceae)Brachiaria durameiosischromosome numbercytomixisThe two accessions of B. dura analyzed (DU01 and DU02) are hexaploid (2n = 6x = 54), derived from x = 9. Meiotic abnormalities, such as precocious chromosome migration to the poles, laggards and micronuclei, were recorded in low frequency in both accessions. The few multivalent chromosome association at diakinesis and meiotic stability suggested that hexaploidy probably resulted from chromosome doubling. In DU02, chromosome transfer (cytomixis) among meiocytes, involving part or the entire genome was observed. The implication of these findings for the Brachiaria breeding is discussed.Instituto Virtual da Biodiversidade | BIOTA - FAPESP2009-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000200024Biota Neotropica v.9 n.2 2009reponame:Biota Neotropicainstname:Instituto Virtual da Biodiversidade (BIOTA-FAPESP)instacron:BIOTA - FAPESP10.1590/S1676-06032009000200024info:eu-repo/semantics/openAccessRisso-Pascotto,ClaudiceiaPagliarini,Maria SuelyValle,Cacilda Borges doeng2009-10-19T00:00:00Zoai:scielo:S1676-06032009000200024Revistahttps://www.biotaneotropica.org.br/v20n1/pt/https://old.scielo.br/oai/scielo-oai.php||juliosa@unifap.br1676-06111676-0611opendoar:2009-10-19T00:00Biota Neotropica - Instituto Virtual da Biodiversidade (BIOTA-FAPESP)false |
dc.title.none.fl_str_mv |
Chromosome number and microsporogenesis of two accessions of Brachiaria dura Stapf (Poaceae) |
title |
Chromosome number and microsporogenesis of two accessions of Brachiaria dura Stapf (Poaceae) |
spellingShingle |
Chromosome number and microsporogenesis of two accessions of Brachiaria dura Stapf (Poaceae) Risso-Pascotto,Claudiceia Brachiaria dura meiosis chromosome number cytomixis |
title_short |
Chromosome number and microsporogenesis of two accessions of Brachiaria dura Stapf (Poaceae) |
title_full |
Chromosome number and microsporogenesis of two accessions of Brachiaria dura Stapf (Poaceae) |
title_fullStr |
Chromosome number and microsporogenesis of two accessions of Brachiaria dura Stapf (Poaceae) |
title_full_unstemmed |
Chromosome number and microsporogenesis of two accessions of Brachiaria dura Stapf (Poaceae) |
title_sort |
Chromosome number and microsporogenesis of two accessions of Brachiaria dura Stapf (Poaceae) |
author |
Risso-Pascotto,Claudiceia |
author_facet |
Risso-Pascotto,Claudiceia 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 |
Risso-Pascotto,Claudiceia Pagliarini,Maria Suely Valle,Cacilda Borges do |
dc.subject.por.fl_str_mv |
Brachiaria dura meiosis chromosome number cytomixis |
topic |
Brachiaria dura meiosis chromosome number cytomixis |
description |
The two accessions of B. dura analyzed (DU01 and DU02) are hexaploid (2n = 6x = 54), derived from x = 9. Meiotic abnormalities, such as precocious chromosome migration to the poles, laggards and micronuclei, were recorded in low frequency in both accessions. The few multivalent chromosome association at diakinesis and meiotic stability suggested that hexaploidy probably resulted from chromosome doubling. In DU02, chromosome transfer (cytomixis) among meiocytes, involving part or the entire genome was observed. The implication of these findings for the Brachiaria breeding is discussed. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-06-01 |
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=S1676-06032009000200024 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000200024 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1676-06032009000200024 |
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 |
Instituto Virtual da Biodiversidade | BIOTA - FAPESP |
publisher.none.fl_str_mv |
Instituto Virtual da Biodiversidade | BIOTA - FAPESP |
dc.source.none.fl_str_mv |
Biota Neotropica v.9 n.2 2009 reponame:Biota Neotropica instname:Instituto Virtual da Biodiversidade (BIOTA-FAPESP) instacron:BIOTA - FAPESP |
instname_str |
Instituto Virtual da Biodiversidade (BIOTA-FAPESP) |
instacron_str |
BIOTA - FAPESP |
institution |
BIOTA - FAPESP |
reponame_str |
Biota Neotropica |
collection |
Biota Neotropica |
repository.name.fl_str_mv |
Biota Neotropica - Instituto Virtual da Biodiversidade (BIOTA-FAPESP) |
repository.mail.fl_str_mv |
||juliosa@unifap.br |
_version_ |
1754575896747966464 |