lecture_17_macroevolution

lecture_17_macroevolution - From Last Class: Gene Trees vs....

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Unformatted text preview: From Last Class: Gene Trees vs. Species Trees: Phylogene;c Methods Can Break Down Solutions to Problems With Phylogenetic Analysis 1) Collect large amounts of data (many genes, rapid/slowly evolving regions, WHOLE GENOMES!) 2) Use explicit models of evolution that incorporate the noisy process of gene trees during speciation= SPECIES TREE APPROACHES Studying the Evolution of Characters: Mapping traits onto an existing phylogeny - Once a phylogeny is reconstructed, it can be used to study the evolution of traits -IMPORTANT: the traits under study should not have been used in phylogenetic reconstruction Parsimony can be used to reconstruct trait evolution Character Evolution using phylogenies: Documents Convergent Evolution Character Evolution using phylogenies: Documents Convergent Evolution Character Evolution using phylogenies: Documents Convergent Evolution -Work in Amsinkia shows that selfing evolved many times, but does not persist over long evolutionary timescales Questions in Macroevolution -What are the broad-scale patterns of species diversification and evolution? -Why do some species persist for longer than others? -What factors influence rates of phenotypic evolution? - What factors influence rates of speciation and extinction? Questions in Macroevolution -Why are there so many species of insects?...
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This note was uploaded on 04/22/2009 for the course EEB 318 taught by Professor Cutter during the Spring '09 term at University of Toronto.

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lecture_17_macroevolution - From Last Class: Gene Trees vs....

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