The major clades of Loasaceae: Phylogenetic analysis using the plastid matK and trnL-trnF regions

Larry Hufford, Michelle M Mcmahon, Anna M. Sherwood, Gail Reeves, Mark W. Chase

Research output: Contribution to journalArticle

39 Citations (Scopus)

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.

Original languageEnglish (US)
Pages (from-to)1215-1228
Number of pages14
JournalAmerican Journal of Botany
Volume90
Issue number8
StatePublished - Aug 1 2003
Externally publishedYes

Fingerprint

Mentzelia
Loasaceae
Plastids
plastid
topology
plastids
phylogenetics
phylogeny
monophyly
Genes
DNA
gene
analysis
testing
nucleotide sequences
test

Keywords

  • Loasaceae
  • Maximum likelihood
  • Parsimony
  • Phylogeny
  • Shimodaira-Hasegawa (SH) test
  • Systematics

ASJC Scopus subject areas

  • Plant Science

Cite this

The major clades of Loasaceae : Phylogenetic analysis using the plastid matK and trnL-trnF regions. / Hufford, Larry; Mcmahon, Michelle M; Sherwood, Anna M.; Reeves, Gail; Chase, Mark W.

In: American Journal of Botany, Vol. 90, No. 8, 01.08.2003, p. 1215-1228.

Research output: Contribution to journalArticle

Hufford, Larry ; Mcmahon, Michelle M ; Sherwood, Anna M. ; Reeves, Gail ; Chase, Mark W. / The major clades of Loasaceae : Phylogenetic analysis using the plastid matK and trnL-trnF regions. In: American Journal of Botany. 2003 ; Vol. 90, No. 8. pp. 1215-1228.
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