Synthetic hybrids of six yeast species
D. Peris, et al. “Synthetic hybrids of six yeast species.” Nature Communications (2020) 11, 2085 [DOI: 10.1038/s41467-020-15559-4]
Allopolyploidy generates diversity by increasing the number of copies and sources of chromosomes. Many of the best-known evolutionary radiations, crops, and industrial organisms are ancient or recent allopolyploids. Allopolyploidy promotes differentiation and facilitates adaptation to new environments, but the tools to test its limits are lacking. Here we develop an iterative method of Hybrid Production (iHyPr) to combine the genomes of multiple budding yeast species, generating Saccharomyces allopolyploids of at least six species. When making synthetic hybrids, chromosomal instability and cell size increase dramatically as additional copies of the genome are added. The six-species hybrids initially grow slowly, but they rapidly regain fitness and adapt, even as they retain traits from multiple species. These new synthetic yeast hybrids and the iHyPr method have potential applications for the study of polyploidy, genome stability, chromosome segregation, and bioenergy.
Raw genome sequencing data have been deposited in NCBI’s SRA database, Bioproject PRJNA476226. HyPr plasmids have been deposited in Addgene as deposit 77444. The source data underlying Figs. 2–6, Supplementary Figs. 3–8, and Supplementary Data 1–7 are provided in the Source Data file and at http://bit.ly/2v1rq1T. All other relevant data are available from the authors upon reasonable request.