| Revista: | Biocell |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000239818 |
| ISSN: | 0327-9545 |
| Autors: | Bione, Nilton Cesar Pires1 Pagliarini, Maria Suely2 Almeida, Leones Alves de3 |
| Institucions: | 1Universidade Estadual do Centro-Oeste, Departamento de Ciencias, Irati, Parana. Brasil 2Universidade Estadual de Maringa, Departamento de Biologia Celular e Genetica, Maringa, Parana. Brasil 3Empresa Brasileira de Pesquisa Agropecuaria, Soja, Londrina, Parana. Brasil |
| Any: | 2005 |
| Període: | Ago |
| Volum: | 39 |
| Número: | 2 |
| Paginació: | 177-181 |
| País: | Argentina |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en inglés | 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 micronuclei. 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 |
| Disciplines | Biología, Agrociencias |
| Paraules clau: | Biología celular, Reproducción y desarrollo, Leguminosas, Meiosis, Metafase, Esterilidad, Mutaciones, Soya, Glycine max |
| Keyword: | Biology, Agricultural sciences, Cell biology, Reproduction and development, Legumes, Meiosis, Metaphase, Sterility, Mutations, Soybean, Glycine max |
| Text complet: | Texto completo (Ver HTML) |
