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Genetics and Molecular Biology
Print version ISSN 1415-4757
SCHIFINO-WITTMANN, Maria Teresa. The cytogenetics and evolution of forage legumes from Rio Grande do Sul: a review. Genet. Mol. Biol. [online]. 2000, vol.23, n.4, pp. 989-995. ISSN 1415-4757. http://dx.doi.org/10.1590/S1415-47572000000400044.
The work developed by the Cytogenetics Group of the Department of Forage Plants and Agrometeorology (Departamento de Plantas Forrageiras e Agrometerologia - DPFA), Agronomy Faculty, Federal University of Rio Grande do Sul (UFRGS), are reviewed in the present study. Topics discussed include: the chromosome numbers and meiotic behavior of Desmodium and Vigna; the application of cytogenetic methods (e.g., polyploidy induction in Trifolium riograndense) to plant breeding; the genetic control of chromosome pairing in autopolyploids of T. riograndense; karyotypes of the Vicia sativa aggregate in Southern Brazil as an example of a founder effect leading to a reduction in karyotype but not to morphological variability; data on the karyotypes of four Lathyrus species which show that the evolution of these species has been accompanied by a decrease in chromosome size, and the results of an investigation of variability in chromosome number in a complete genus, Leucaena. The main objectives of the group for the near future are also outlined.