With almost 20 genomes sequenced from unicellular ascomycetes (Saccharomycotina), and the prospect of many more in the pipeline, we review the patterns and processes of yeast genome evolution. A central core of about 4000 genes is shared by all the sequenced yeast genomes. Gains of genes by horizontal gene transfer seem to be very rare. Gene losses are more frequent, and losses of whole sets of genes in some pathways in some species can be understood in terms of species-specific differences in biology. The wholesale loss of redundant copies of duplicated genes after whole-genome duplication in the ancestor of one clade of yeasts is likely to have caused the emergence of many reproductively isolated lineages of yeasts at that time, but other processes are responsible for species barriers that arose more recently among close relatives of Saccharomyces cerevisiae.
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| Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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