Large Trees, Supertrees and the Grass Phylogeny
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منابع مشابه
Maximum Likelihood Supertrees Maximum Likelihood Supertrees MIKE STEEL AND ALLEN RODRIGO Author’s Affiliations
We analyse a maximum-likelihood approach for combining phylogenetic trees into a larger ‘supertree’. This is based on a simple exponential model of phylogenetic error, which ensures that ML supertrees have a simple combinatorial description (as a median tree, minimising a weighted sum of distances to the input trees). We show that this approach to ML supertree reconstruction is statistically co...
متن کاملLarge Trees, Supertrees, and Diversification of the Grass Family
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 pa...
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Supertree methods reconcile a set of phylogenetic trees into a single structure that is often interpreted as a branching history of species. A key challenge is combining conflicting evolutionary histories that are due to artifacts of phylogenetic reconstruction and phenomena such as lateral gene transfer (LGT). Many supertree approaches use optimality criteria that do not reflect underlying pro...
متن کاملSubmitted 05.09.03 PERFORMANCE OF FLIP-SUPERTREE HEURISTIC Performance of Flip-Supertree Construction with a Heuristic Algorithm
Supertree methods assemble separate phylogenetic trees with shared taxa into larger trees, or supertrees, in an effort to construct more comprehensive phylogenetic hypotheses. In spite of much recent interest in supertrees, there are still few methods for supertree construction. The flip supertree problem is an error correction approach that seeks to find a minimum number of changes, or "flips"...
متن کاملMeta-trees: grafting for a global perspective
—Assembling phylogenetic trees for groups of organisms with thousands of taxa is problematic because of the large amount of data and trees that must be generated and analyzed. Several attempts have been made to develop a better way to handle the problems of large trees. Meta-trees (Meta Supertrees) are suggested as a way to generate a phylogeny for groups where you have many different data sets...
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تاریخ انتشار 2002