Theoretical and Applied Genetics

, Volume 94, Issue 6–7, pp 925–933

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

  • E. E. Schilling


 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 


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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • E. E. Schilling
    • 1
  1. 1.Department of Botany, University of Tennessee, Knoxville, TN 37996-1100, USAUS

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