Skip to main content

Testing Hybridization Hypotheses with Morphometry: the Case of Eastern American Arctic Species of Potentilla sect. Niveae (Rosaceae)

Buy Article:

$15.00 plus tax (Refund Policy)

Abstract—

Asexual reproduction, polyploidy and hybridization are well-known sources of taxonomic complexity in angiosperms. All these processes are believed to occur in Potentilla sect. Niveae (Rosaceae). Although it has been assumed that hybridization is common in section Niveae, this hypothesis has not been tested and recent studies suggest that phenotypic plasticity may sometimes better explain morphological intermediates in nature. To clarify the role of hybridization in the evolution of section Niveae, we tested two hybridization hypotheses for its eastern American Arctic species. The first is a potential hybrid between Potentilla nivea and Potentilla arenosa, and the second between Potentilla arenosa and Potentilla vahliana sensu lato. Twenty-four quantitative and 12 qualitative morphological characters were scored on specimens sampled from a representative range of the parental species and putative hybrids in the American Arctic east of the 100th meridian. Multivariate analyses showed that these two classes of characters give a congruent signal and that species form separate groups. Morphological evidence appears to give support to the hybridization hypothesis both between Potentilla arenosa and Potentilla nivea and between Potentilla arenosa and Potentilla vahliana sensu lato, although other explanations may also be conceivable. We discuss potential implications for the taxonomy of Potentilla and the study of hybridization in apomictic groups.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Keywords: Arctic-alpine; discriminant analysis; facultative apomixis; taxonomy; trichome morphology

Document Type: Research Article

Publication date: 2014-03-01

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more