A Cytotaxonomic Study in Twelve Brazilian Taxa of Stylosanthes Sw., Leguminosae

抄録

The karyotypes of twelve diploid taxa (2n=20) of the Stylosanthes, Leguminosae, were analysed. The genus has a very conservative karyological pattern. The comparison among taxa belonging to the controversial S. guiananesis species complex, showed clear differences in size of their chromosome complements and morphology, which suggest that this group is under a process of chromosome evolution by the occurrence of rearrangements and changes in DNA content. The analysis of four species unrelated to this complex showed clear differences among their karyotypes.