A male-sterile mutation in soybean (Glycine max) affecting chromosome arrangement in metaphase plate and cytokinesis
Biocell
;
29(2): 177-181, ago. 2005. ilus, tab
Article
in English
| LILACS
| ID: lil-429672
RESUMO
A spontaneous male-sterile, female-fertile mutation affecting bivalent arrangement at the metaphase plate and cytokinesis was detected in line BR98-197 of the soybean breeding program developed by Embrapa - National Soybean Research Centre. Untill diakinesis, meiosis was normal with chromosome pairing as bivalents. From this phase, in several meiocytes, bivalents were not able to organize a single metaphase plate and remained scattered in the cytoplasm in a few or several groups. In these meiocytes, chromosomes segregated in both divisions giving rise to several micronuc1ei. However, the main cause of male sterility was the absence of cytokinesis after telophase II. Instead of the typical tetrads of microspores, four nucleate coenocytic microspores were formed. In the mutant, pollen mitoses did not occur, and after engorgement by starch, pollen underwent a progressive process of degeneration
Search on Google
Index:
LILACS (Americas)
Main subject:
Soybeans
/
Cell Division
/
Infertility, Male
/
Meiosis
/
Metaphase
Language:
English
Journal:
Biocell
Journal subject:
Clulas
Year:
2005
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Embrapa-National Soybean Research Center/BR
/
State University of Maringá/BR
/
Unicentro/BR
Similar
MEDLINE
...
LILACS
LIS