Unraveling reticulate evolution in North American Dryopteris (Dryopteridaceae).

ABSTRACT:

Background

The thirteen species of Dryopteris in North America have long been suspected of having undergone a complicated history of reticulate evolution via allopolyploid hybridization. Various explanations for the origins of the allopolyploid taxa have been suggested, and though most lines of evidence have supported the so-called "semicristata" hypothesis, contention over the group's history has continued in several recent, conflicting studies.

Results

Sequence data from nine plastid and two nuclear markers were collected from 73 accessions representing 35 species of Dryopteris. Sequences from each of the allopolyploids are most closely related to their progenitor species as predicted by the "semicristata" hypothesis. Allotetraploid D. campyloptera appears to be derived fr

SUBMITTER: Sessa EB 

PROVIDER: S-EPMC3509404 | biostudies-literature | 2012 Jun

REPOSITORIES: biostudies-literature