Journal article
The major clades of Loasaceae: phylogenetic analysis using the plastid matK and trnL-trnF regions
American journal of botany, Vol.90(8), pp.1215-1228
08/2003
Handle:
https://hdl.handle.net/2376/103879
PMID: 21659222
Abstract
Phylogenetic analyses of Loasaceae that apply DNA sequence data from the plastid trnL-trnF region and matK gene in both maximum-parsimony and maximum-likelihood searches are presented. The results place subfamily Loasoideae as the sister of a subfamily Gronovioideae-Mentzelia clade. Schismocarpus is the sister of the Loasoideae-Gronovioideae-Mentzelia clade. The Schismocarpus-Loasoideae-Gronovioideae-Mentzelia clade is the sister of Eucnide. Several clades in Loasoideae receive strong support, providing insights on generic circumscription problems. Within Mentzelia, several major clades receive strong support, which clarifies relationships among previously circumscribed sections. Prior taxonomic and phylogenetic hypotheses are modeled using topology constraints in parsimony and likelihood analyses; tree lengths and likelihoods, respectively, are compared from constrained and unconstrained analyses to evaluate the relative support for various hypotheses. We use the Shimodaira-Hasegawa (SH) test to establish the significance of the differences between constrained and unconstrained topologies. The SH test rejects topologies based on hypotheses for (1) the placement of gronovioids as the sister of the rest of Loasaceae, (2) the monophyly of subfamily Mentzelioideae as well as Gronovioideae and Loasoideae, (3) the monophyly of Loasa sensu lato as circumscribed by Urban and Gilg, and (4) the monophyly of Mentzelia torreyi and Mentzelia sect. Bartonia.
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Details
- Title
- The major clades of Loasaceae: phylogenetic analysis using the plastid matK and trnL-trnF regions
- Creators
- Larry Hufford - School of Biological Sciences, Washington State University, Pullman, Washington 99164-4236 USA;andMichelle M McMahonAnna M SherwoodGail ReevesMark W Chase
- Publication Details
- American journal of botany, Vol.90(8), pp.1215-1228
- Academic Unit
- Biological Sciences, School of
- Publisher
- United States
- Identifiers
- 99900546540201842
- Language
- English
- Resource Type
- Journal article