URDAMPILLETA juan Domingo
Chromosome studies of some Thinouia species (Sapindaceae) and the taxonomic implications
URDAMPILLETA, J. D.; FERRUCCI, M. S.; FORNI MARTINS, E. R.
ANNALES BOTANICI FINNICI
Finnish Zoological and Botanical Publishing
Lugar: Helsinki; Año: 2008 vol. 45 p. 68 - 73
The karyotypes of three species of the genus Thinouia (Sapindaceae, Paullinieae) from southern Brazil and Bolivia are analyzed. New counts and karyotypes are reported for the first time for T. ventricosa and T. paraguayensis, both with 2n = 28. The karyotype formulae of T. mucronata, T. paraguayensis and T. ventricosa are 8m + 14sm + 6st, 10m + 8sm + 10st, and 14m + 4sm + 10st, respectively. In all the species investigated, the prophase chromosome condensation was always proximal and the pattern of the interphase nuclei was non-reticulate. These results are discussed in relation to previous chromosome studies for Paullinieae in order to infer the phylogenetic relationships within the tribe.