Theoretical and Applied Genetics

, Volume 94, Issue 6, pp 925–933

Phylogenetic analysis of Helianthus (Asteraceae) based on chloroplast DNA restriction site data

Authors

  • E. E. Schilling
    • Department of Botany, University of Tennessee, Knoxville, TN 37996-1100, USA

DOI: 10.1007/s001220050497

Cite this article as:
Schilling, E. Theor Appl Genet (1997) 94: 925. doi:10.1007/s001220050497

Abstract

 Chloroplast DNA (cpDNA) restriction site data were used to analyze phylogenetic relationships within Helianthus. Data from new samples were consistent with previous results and showed the genus to be a well-defined (11 site changes) lineage within subtribe Helianthinae. The affinities of 2 species, Viguiera similis and V. phenax (V. ludens) that have sometimes been included in Helianthus were shown to lie outside the genus. The two species of Phoebanthus, however, formed a phylogenetic ingroup to the perennial Helianthus. Within the genus, cpDNA data indicated that there are four distinct phylogenetic lineages. Two of the lineages each contained a single, annual species (H. agrestis and H. porteri, respectively). The remaining annual species collectively formed a third lineage (sect. Helianthus). The fourth lineage contained all of the perennial species, including those of Phoebanthus. Within the perennial lineage, there was little variation in restriction site characters. The 3 species of series Pumili formed a paraphyletic group at the base of the perennial lineage, and the 3 species of series Ciliares formed a group that was supported by a single restriction site character.

Key words Sunflowers Helianthus Asteraceae Chloroplast DNA Phylogenetic relationships

Copyright information

© Springer-Verlag Berlin Heidelberg 1997