Abstract
The tree of eukaryotic life was reconstructed based on the analysis of 2,269 myosin motor domains from 328 organisms, confirming some accepted relationships of major taxa and resolving disputed and preliminary classifications.
Highlights
The evolutionary history of organisms is expressed in phylogenetic trees
Direct information on duplication events involving part of a genome or whole genomes can be obtained. Such an analysis requires a large and divergent gene family and sufficient taxon sampling. It is advantageous if the taxa are closely related, to provide the necessary statistical basis for subfamilies, as well as spread over many branches of eukaryotic life, to cover the highest diversity possible
We have collected all myosin genes that have either been derived from the isolation of single genes and submitted to the nr database at NCBI, or that we obtained by manually analysing the data of whole genome sequencing and expressed sequence tag (EST)-sequencing projects
Summary
The evolutionary history of organisms is expressed in phylogenetic trees. The most widely used phylogenetic trees describing the evolution of all organisms have been constructed based on single-gene phylogenies that, often produce conflicting results. R196.2 Genome Biology 2007, Volume 8, Issue 9, Article R196 Odronitz and Kollmar http://genomebiology.com/2007/8/9/R196 limitation [5,6] In this context, large and diverse gene families are often considered unhelpful for reconstructing ancient evolutionary relationships because of the accompanying difficulties in distinguishing homologs from paralogs and orthologs [7]. Direct information on duplication events involving part of a genome or whole genomes can be obtained Such an analysis requires a large and divergent gene family and sufficient taxon sampling. It is advantageous if the taxa are closely related, to provide the necessary statistical basis for subfamilies, as well as spread over many branches of eukaryotic life, to cover the highest diversity possible. Many of these sequences are derived from comparative genomic sequencing efforts (for example, the sequencing of 12 Drosophila species), providing the statistical basis for excluding artificial relationships
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