Chromosome number and microsporogenesis of two accessions of Brachiaria dura Stapf (Poaceae)

Detalhes bibliográficos
Autor(a) principal: Risso-Pascotto,Claudiceia
Data de Publicação: 2009
Outros Autores: Pagliarini,Maria Suely, Valle,Cacilda Borges do
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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spelling 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

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