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Meiotic behavior of several Brazilian soybean varieties

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Author(s): Bione Nilton Cesar Pires | Pagliarini Maria Suely | Toledo José Francisco Ferraz de

Journal: Genetics and Molecular Biology
ISSN 1415-4757

Volume: 23;
Issue: 3;
Start page: 623;
Date: 2000;
Original page

ABSTRACT
Despite the importance of soybeans little cytogenetic work has traditionally been done, due to the small size and apparent similarity of the chromosomes. Fifteen soybean [Glycine max (L.) Merrill] varieties adapted for cultivation in two distinct regions of Brazil were analyzed cytogenetically. A low frequency of meiotic abnormalities was noted in all varieties, although they were not equally affected. Irregular chromosome segregation, chromosome stickiness, cytoplasmic connections between cells, cytomixis and irregular spindles were the main abnormalities observed, none of which had been described previously in soybeans. All of these abnormalities can affect pollen fertility. Pollen fertility was high in most varieties and was correlated with meiotic abnormalities. Although soybean is not a model system for cytological studies, we found that it is possible to conduct cytogenetic studies on this species, though some modifications in the standard methods for meiotic studies were necessary to obtain satisfactory results.

Tango Jona
Tangokurs Rapperswil-Jona

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