Artículos de revistas
Chromosome studies in some Stevia. Cav. (Compositae) species from Southern Brazil
Fecha
1996-01-01Registro en:
Brazilian Journal of Genetics. Sociedade Brasileira de Genética, v. 19, n. 4, p. 605-609, 1996.
0100-8455
10.1590/S0100-84551996000400013
S0100-84551996000400013
S0100-84551996000400013.pdf
Autor
Universidade Estadual de Londrina (UEL)
Universidade Estadual Paulista (Unesp)
Universidade Federal de Uberlândia (UFU)
Institución
Resumen
Karyotypes of six species of the genus Stevia from Southern Brazil were studied, utilizing root tip metaphases. All species were diploid with 2n = 22 chromosomes. It was possible to identify each species by chromosome morphology. The basic chromosome number for Brazilian species of Stevia is X = 11. This number is also found in almost all South American species. We suggest that in Stevia there is an evolutionary trend toward chromosomal rearrangement, caused mainly by pericentric inversions. It was found that, in addition to aneuploidy and polyploidy, chromosomal rearrangements are common in the tribe Eupatorieae.