TRIBES AND CLADES WITHIN APIACEAE SUBFAMILY APIOIDEAE : THE CONTRIBUTION OF MOLECULAR DATA

By S. R. Downie, G. Plunkett, M. Watson, Krzysztof Spalik, D. Downie, C. Roman, E. Terentieva, A. Troitsky, B. Y. Lee, J. Lahham and 1 more. 2001

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Phylogenetic analyses of chloroplast gene ( rbc L, mat K), intron ( rpl 16, rps 16, rpo C1) and nuclear ribosomal DNA internal transcribed spacer (ITS) sequences and chloroplast DNA restriction sites, with supplementary data from variation in size of the chloroplast genome inverted repeat, have been used to elucidate major clades within Apiaceae ( Umbelliferae ) subfamily Apioideae Drude. This paper summarizes the results of previously published molecular cladistic analyses and presents a provisional classification of the subfamily based on taxonomic congruence among the data sets. Ten tribes ( Aciphylleae M. F. Watson & S. R. Downie, Bupleureae Spreng., Careae Baill., Echinophoreae Benth., Heteromorpheae M. F. Watson & S. R. Downie, Oenantheae Dumort., Pleurospermeae M. F. Watson & S. R. Downie, Pyramidoptereae Boiss., Scandiceae Spreng. and Smyrnieae Spreng.) are erected or confirmed as monophyletic, with Scandiceae comprising subtribes Daucinae Dumort., Scandicinae Tausch and Torilidinae Dumort. Seven additional clades are also recognized but have yet to be treated formally, and at least 23 genera examined to date are of dubious tribal or clade placement. The utility of these different molecular markers for phylogenetic inference in Apioideae is compared based on maximum parsimony analyses of subsets of previously published molecular data sets. Of the six loci sequenced, the ITS region is seen to be evolving most rapidly and rbc L is the most conservative. Intermediate in rate of evolution are mat K and the three chloroplast introns; with rpl 16 and rps 16 evolving slightly faster than mat K or rpo C1. The analysis of restriction sites, however, provided 2–4 times more parsimony informative characters than any single DNA locus sequenced, with estimates of divergence just slightly lower than that of the ITS region. The trees obtained from separate analyses of these reduced data sets are consistent with regard to the major clades inferred and the relationships among them. Similar phylogenies are obtained by combining data or combining trees, representing the supermatrix and supertree approaches to phylogenetic analysis, respectively. The inferred relationship among the tribes and informally recognized major clades within Apioideae is presented.

Subfields: Cell Biology, Molecular Biology, Plant Science

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Citations in the corpus

Intercontinental disjunctions in Cryptotaenia (Apiaceae, Oenantheae): an appraisal using molecular data (2007, methodology): “, 2004), Pimpinelleae (Downie et al., 2001), and Scandiceae subtribe Daucinae (Downie et al.”
Infrafamilial classifications and characters in Araliaceae: Insights from the phylogenetic analysis of nuclear (ITS) and plastid (trnL-trnF) sequence data (2004, background): “Downie et al. (2001) suggested that resolution of tribal-level problems in Apiaceae will require recognition of clades largely on the basis of molecular data, with a posteriori identification of morphological syn- apomorphies that may be unique only as suites of characters.”
The phylogenetic position of Peucedanum sensu lato and allied genera and their placement in tribe Selineae (Apiaceae, subfamily Apioideae) (2004, methodology): “Peucedanum is a member of the ‘Angelica’ clade sensu stricto, belonging to the large apioid superclade ( Downie et al. 2001 ).”
The tortoise and the hare II: relative utility of 21 noncoding chloroplast DNA sequences for phylogenetic analysis. (2005, background): “Phylogenetic analysis of chloroplast rps16 intron sequences reveals relationships within the woody southern African Apiaceae subfamily Apioideae.”