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Updated: Jun 3, 2026

Genetic Mapping of Thermotolerance Differences Between Species of Saccharomyces Yeast via Genome-Wide Reciprocal Hemizygosity Analysis

Genetic Mapping of Thermotolerance Differences Between Species of Saccharomyces Yeast via Genome-Wide Reciprocal Hemizygosity Analysis

Published on: August 12, 2019

Systematic exploration of essential yeast gene function with temperature-sensitive mutants.

Zhijian Li¹, Franco J Vizeacoumar, Sondra Bahr

¹Banting and Best Department of Medical Research, The Donnelly Centre, University of Toronto, Toronto, Ontario, Canada.

Nature Biotechnology

|March 29, 2011

Summary

Researchers created 787 temperature-sensitive (ts) yeast strains for essential genes. This collection aids in understanding gene functions through high-throughput genetic and phenotypic analysis.

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Area of Science:

* Yeast genetics and molecular biology
* Functional genomics
* Cell biology

Background:

* Essential genes in Saccharomyces cerevisiae are critical for cell viability.
* Conditional temperature-sensitive (ts) mutations are powerful tools for studying essential gene function.
* Previous efforts had not comprehensively covered the essential yeast gene set with ts alleles.

Purpose of the Study:

* To construct a comprehensive collection of temperature-sensitive (ts) mutant strains for essential Saccharomyces cerevisiae genes.
* To facilitate high-throughput genetic and phenotypic analysis of essential gene function.
* To enable systematic studies for uncovering novel gene roles.

Main Methods:

* Construction of 787 ts mutant strains covering 497 essential yeast genes, with multiple alleles for many genes.
* Integration of all alleles into the native genomic locus of the S288C reference strain.
* Application of synthetic genetic array (SGA)-based methods, including barcoding for chemical-genetic analysis and fluorescent markers for high-content screening.

Main Results:

* A collection of 787 ts strains representing approximately 45% of essential yeast genes was generated.
* Demonstrated utility through barcoding 440 strains and creating fluorescently tagged strain arrays.
* Quantitative analysis using a GFP-tubulin marker revealed roles for cohesin and condensin genes in spindle disassembly.

Conclusions:

* The generated ts mutant collection provides a valuable resource for systematic functional studies of essential yeast genes.
* This resource enables diverse applications, including chemical-genetics and quantitative phenotyping.
* Facilitates future research into the complex roles of essential genes in cellular processes.