Publication Type:
i
Refereed Author(s): Hodkinson, Trevor R. ;
Salamin, Nicolas ;
Chase, Mark W. ;
Bouchenak-Khelladi, Yanis ;
Renvoize, Stephen A. ;
Savolainen, Vincent Author Affiliation: Hodkinson and Bouchenak-Khelladi: Department of Botany, School of Natural Sciences, University of Dublin, Trinity College, Dublin, Ireland; Salamin: Department of Ecology and Evolution, University of Lausanne, Lausanne, Switzerland; Chase, Bouchenak-Khelladi and Savolainen: Molecular Systematics Section, Jordrelll Laboratory; Renvoize: Herbarium, Royal Botanic Gardens, Kew, Richmond, Surrey, UK Title: Large trees, supertrees, and diversification of the grass family Section: Poaceae: Overall phylogeny and classificationOther records with the "Poaceae: Overall phylogeny and classification" Section Source: Aliso: A Journal of Taxonomic and Evolutionary Botany . December 2007, p. 248-258.# of Pages: 11 Publishing Information: Claremont, CA: Rancho Santa Ana Botanic Garden Keywords: TIC Keywords: Analytical methods ; Classification ; Distribution (statistics) ; Evolution ; Experimental design ; Genetic diversity ; Poaceae ; Quality evaluation ; Software ; Taxonomic families Abstract/Contents: "Phylogenetic studies of grasses (Poaceae) are advanced in comparison with most other angiosperm families. However, few studies have attempted to build large phylogenetic trees of the family and use these for evaluating patterns of diversification or other macroevolutionary hypotheses. Two contrasting approaches can be used to generate large trees: supermatrix analyses and supertrees. In this paper, we evaluated the suitability of each of these methods for the study of patterns and processes of evolution in the grasses. We collected data from DDBJ/EMBL/GenBank to determine sequence availability and asked how far we are from a complete generic-level phylogenetic tree of the grasses. We generated almost complete tribal-level supertrees (39 tribes) with over 400 genera using MRP methods, described their major clades, assessed their accuracy, and used them for the study of diversification. We generated a proportional supertree, by modifying the original supertree, to remove sampling bias associated with the original supertree that may affect diversification statistics. We used methods that incorporate information on the topological distribution of taxon diversity from all internal nodes of the phylogenetic tree to show that the grasses have experienced significant variations in diversification rates (M statistic P -values <0.001 for the original tree; <0.002 for the proportional tree) and show where on the trees significant shifts in diversification have occurred (seven shifts for the original tree; four shifts for the proportional tree). Such tests have not previously been attempted for the grasses, and we discuss future research directions in this area." Language: English References: 72 Note: "A journal of taxonomic and evolutionary botany" ASA/CSSA/SSSA Citation (Crop Science -Like - may be incomplete ): Aliso: A Journal of Taxonomic and Evolutionary Botany .Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=174523 If there are problems with this record, send us feedback about record 174523 . Choices for finding the above item : b2208756 Request through your local library's inter-library loan service (bring or send a copy of this TGIF record)
