Data from: A phylogeny of the genus Amaranthus (Amaranthaceae), based on several low-copy nuclear loci and chloroplast regions ...

• Main Authors: Waselkov, Katherine E., Boleda, Alexis S., Olsen, Kenneth M.
• Format: Dataset
• Language: English
• Published: Dryad 2019
• Subjects: Chloroplast capture; Amaranthus; pigweeds; Amaranthus palmeri; Topology testing; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.5061/dryad.156j4; https://datadryad.org/stash/dataset/doi:10.5061/dryad.156j4

The genus Amaranthus (pigweeds) is a group of ∼74 monoecious or dioecious annual species native to every continent but Antarctica, frequently associated with natural and human disturbance, with several economically important domesticated and weedy species. We set out to reconstruct the phylogeny of Amaranthus, with broad geographic sampling, in order to answer questions about biogeographic relationships in the genus and the monophyly of the subgenera. Fifty-eight species were included inmaximum parsimony and Bayesian phylogenetic analyses based on ITS and three low-copy nuclear genes (A36, G3PDH, and Waxy), as well as two chloroplast regions (trnL5′-trnL3′ and matK/trnK). Topology tests were also employed to test taxonomic hypotheses about incongruence between trees and the monophyly of clades containing Galápagos species. Our analyses support the origin of the genus in the Americas, with a single long-distance dispersal event to the Old World, and both nuclear and chloroplast trees recover three to ... : Waselkov Data SysBot 2018Data (sequence alignments, tree files, and supplementary information) associated with Waselkov et al. 2018, Systematic Botany. ...