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Continuous High-resolution Microscopic Observation of Replicative Aging in Budding Yeast

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Published on: August 20, 2013

Natural genetic variation in yeast longevity.

Stefan W Stumpferl¹, Sue E Brand, James C Jiang

¹Tulane Center for Aging and Department of Medicine, Tulane University Health Sciences Center, New Orleans, Louisiana 70112, USA.

Genome Research

|September 8, 2012

Summary

Researchers explored yeast

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A Suppressor Screen for the Characterization of Genetic Links Regulating Chronological Lifespan in Saccharomyces cerevisiae

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Published on: September 17, 2020

Area of Science:

Genetics
Aging Research
Yeast Biology

Background:

Aging studies in Saccharomyces cerevisiae often use lab strains.
Natural genetic variation in wild yeast offers new insights into aging.

Purpose of the Study:

To perform a quantitative genetic analysis of yeast replicative lifespan.
To identify genes and genomic regions influencing lifespan by analyzing natural genetic variation.

Main Methods:

Quantitative trait locus (QTL) analysis using 3048 molecular markers.
Crossed a laboratory strain (S288c) with a clinical strain (YJM145).
Reciprocal gene swap experiments and rDNA cluster analysis.

Main Results:

Identified five significant replicative lifespan QTL.
QTL 1 (chromosome IV) containing SIR2 significantly impacts lifespan.
QTL 5 (chromosome XII) associated with rDNA copy number also affects longevity.
SIR2 and rDNA loci interact but do not fully explain longevity effects.

Conclusions:

Natural genetic variation in yeast reveals complex genetic architecture of lifespan.
SIR2 and rDNA loci are key genetic determinants of yeast replicative lifespan.
Highlights the importance of studying unsampled genetic variation in aging research.