Normal microspore production after cell fusion in Brachiaria jubata (Gramineae)
Genet. mol. biol
;
26(4): 517-520, dec. 2003. ilus, tab
Article
in English
| LILACS
| ID: lil-355303
ABSTRACT
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.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Cell Fusion
/
Poaceae
Language:
English
Journal:
Genet. mol. biol
Journal subject:
Genetics
Year:
2003
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Embrapa Gado de Corte/BR
/
Universidade Estadual de Maringa/BR
Similar
MEDLINE
...
LILACS
LIS