A global evolutionary map reveals new insights into our last common ancestor
In 1870 the German scientist Ernst Haeckel mapped the evolutionary relationships of plants and animals in the first ’tree of life’. Since then scientists have continuously redrawn and expanded the tree adding microorganisms and using modern molecular data, yet, many parts of the tree have remained unclear. Now a group at the European Molecular Biology Laboratory (EMBL) in Heidelberg has developed a computational method that resolves many of the open questions and produced what is likely the most accurate tree ever. The study, which appears in the current issue of the journal Science, gives some intriguing insights into the origins of bacteria and the last common universal ancestor of all life on earth today.
"DNA sequences of complete genomes provide us with a direct record of evolution", says Peer Bork, Associate Coordinator for Structural and Computational Biology at EMBL, whose group carried out the project. "For a long time the overwhelming amount of data (the human genome alone contains enough information to fill 200 telephone books) has made it very difficult to pinpoint the information needed for a high-resolution map of evolution. But our study shows how this challenge can be tackled by combining different computational methods in an automated process."
Anna-Lynn Wegener | EurekAlert!
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