ANGULO Maria betiana
Karyotypes of some species of the genus Lessingianthus (Vernonieae, Asteraceae) and taxonomic implications
ANGULO, M. B.; DEMATTEIS, M.
NORDIC JOURNAL OF BOTANY
WILEY-BLACKWELL PUBLISHING, INC
Lugar: Londres; Año: 2015 vol. 33 p. 239 - 248
We determined the karyotypes of nine species of Lessingianthus, eight of which are here analyzed for the frst time. Te results include the frst chromosome count for L. plantaginoides, which is tetraploid with 2n=64. All species showed a high proportion of metacentric chromosomes combined with a lower proportion of submetacentric pairs. Only L. coriaceus had a subtelocentric chromosome pair. B chromosomes were observed in L. coriaceus and L. varroniifolius, which were subtelocentric. Diferences among the karyotypes of the studied species were small, suggesting that karyotype diversity in the genus evolved by small changes in the structure of chromosomes. Karyotype features appear useful to distinguish Lessingianthus from the closely related genera Chrysolaena and Lepidaploa.