A male-sterile mutation in soybean (Glycine max) affecting chromosome arrangement in metaphase plate and cytokinesis
Document title: A male-sterile mutation in soybean (Glycine max) affecting chromosome arrangement in metaphase plate and cytokinesis
Journal: Biocell
Database: PERIÓDICA
System number: 000239818
ISSN: 0327-9545
Authors: 1
2
3
Institutions: 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
Year:
Season: Ago
Volumen: 39
Number: 2
Pages: 177-181
Country: Argentina
Language: Inglés
Document type: Artículo
Approach: Experimental
English abstract 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
Keyword: 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
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