Crossings between strains of Saccharomyces cerevisiae and Saccharomyces bayanus were carried out. Genetic, molecular and electrophoretic karyotyping data indicated that interspecific hybrids were obtained. The hybrid cells segregated "grande" and "petite" colonies, and the latter ranged between 20 and 50%; unlike "grande" colonies, "petite" colonies did not sporulate and did not ferment maltose. In the hybrids, the extent of sporulation varied between 10 and 20%; only very rare asci (around 10(-4)) held viable ascospores. Clones from the viable ascospores sporulated and produced asci with viable ascospores able to give mating with spores from both hybrid derivatives and parental species. Fertile asci could derive from allotetraploid cells generated by endomitotic events in allodiploid cells, a mechanism that enables overcoming the species barrier between S. cerevisiae and S. bayanus.
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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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