Normal microspore production after cell fusion in Brachiaria jubata (Gramineae)
Cytogenetic studies were carried out on 22 accessions of Brachiaria jubata from the Embrapa Beef Cattle Brachiaria collection. One accession was diploid (2n = 2x = 18) and the remaining 21 were tetraploid (2n = 4x = 36). Among five tetraploid accessions, a specific and constant pattern of cell fusion involving only two microsporocytes was recorded. Meiosis proceeded normally from prophase I to the end, giving rise to an octad with normal microspores that developed into fertile pollen grains. Regular octad formation was possible because each cellular chromosome set was maintained in its proper domain, spindles were correctly positioned, and cytokinesis planes were formed in the correct places. Such behavior of meiosis in syncytes has never been reported in any other plant species.
Main Authors: | , , , |
---|---|
Format: | Digital revista |
Language: | English |
Published: |
Sociedade Brasileira de Genética
2003
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000400016 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
oai:scielo:S1415-47572003000400016 |
---|---|
record_format |
ojs |
spelling |
oai:scielo:S1415-475720030004000162004-04-06Normal microspore production after cell fusion in Brachiaria jubata (Gramineae)Mendes-Bonato,Andréa BeatrizRisso-Pascotto,ClaudicéiaPagliarini,Maria SuelyValle,Cacilda Borges do Brachiaria jubata cell fusion microsporogenesis pollen fertility Cytogenetic studies were carried out on 22 accessions of Brachiaria jubata from the Embrapa Beef Cattle Brachiaria collection. One accession was diploid (2n = 2x = 18) and the remaining 21 were tetraploid (2n = 4x = 36). Among five tetraploid accessions, a specific and constant pattern of cell fusion involving only two microsporocytes was recorded. Meiosis proceeded normally from prophase I to the end, giving rise to an octad with normal microspores that developed into fertile pollen grains. Regular octad formation was possible because each cellular chromosome set was maintained in its proper domain, spindles were correctly positioned, and cytokinesis planes were formed in the correct places. Such behavior of meiosis in syncytes has never been reported in any other plant species.info:eu-repo/semantics/openAccessSociedade Brasileira de GenéticaGenetics and Molecular Biology v.26 n.4 20032003-12-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000400016en10.1590/S1415-47572003000400016 |
institution |
SCIELO |
collection |
OJS |
country |
Brasil |
countrycode |
BR |
component |
Revista |
access |
En linea |
databasecode |
rev-scielo-br |
tag |
revista |
region |
America del Sur |
libraryname |
SciELO |
language |
English |
format |
Digital |
author |
Mendes-Bonato,Andréa Beatriz Risso-Pascotto,Claudicéia Pagliarini,Maria Suely Valle,Cacilda Borges do |
spellingShingle |
Mendes-Bonato,Andréa Beatriz Risso-Pascotto,Claudicéia Pagliarini,Maria Suely Valle,Cacilda Borges do Normal microspore production after cell fusion in Brachiaria jubata (Gramineae) |
author_facet |
Mendes-Bonato,Andréa Beatriz Risso-Pascotto,Claudicéia Pagliarini,Maria Suely Valle,Cacilda Borges do |
author_sort |
Mendes-Bonato,Andréa Beatriz |
title |
Normal microspore production after cell fusion in Brachiaria jubata (Gramineae) |
title_short |
Normal microspore production after cell fusion in Brachiaria jubata (Gramineae) |
title_full |
Normal microspore production after cell fusion in Brachiaria jubata (Gramineae) |
title_fullStr |
Normal microspore production after cell fusion in Brachiaria jubata (Gramineae) |
title_full_unstemmed |
Normal microspore production after cell fusion in Brachiaria jubata (Gramineae) |
title_sort |
normal microspore production after cell fusion in brachiaria jubata (gramineae) |
description |
Cytogenetic studies were carried out on 22 accessions of Brachiaria jubata from the Embrapa Beef Cattle Brachiaria collection. One accession was diploid (2n = 2x = 18) and the remaining 21 were tetraploid (2n = 4x = 36). Among five tetraploid accessions, a specific and constant pattern of cell fusion involving only two microsporocytes was recorded. Meiosis proceeded normally from prophase I to the end, giving rise to an octad with normal microspores that developed into fertile pollen grains. Regular octad formation was possible because each cellular chromosome set was maintained in its proper domain, spindles were correctly positioned, and cytokinesis planes were formed in the correct places. Such behavior of meiosis in syncytes has never been reported in any other plant species. |
publisher |
Sociedade Brasileira de Genética |
publishDate |
2003 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000400016 |
work_keys_str_mv |
AT mendesbonatoandreabeatriz normalmicrosporeproductionaftercellfusioninbrachiariajubatagramineae AT rissopascottoclaudiceia normalmicrosporeproductionaftercellfusioninbrachiariajubatagramineae AT pagliarinimariasuely normalmicrosporeproductionaftercellfusioninbrachiariajubatagramineae AT vallecacildaborgesdo normalmicrosporeproductionaftercellfusioninbrachiariajubatagramineae |
_version_ |
1756418945368195072 |