Natural variation in replicative and chronological life spans of Saccharomyces cerevisiae

Experimental Gerontology
Hong Qin, Meng Lu

Abstract

Natural variation in the lifespan of natural yeast populations has not been systematically investigated. Here, we have quantified the variation in the replicative and chronological life spans (RLS and CLS) in natural isolates of Saccharomyces cerevisiae and found that genotypic variation accounts for about 22% of the total variation of RLS. Strikingly, the average RLS of 14 natural isolates is about 30% longer than that of 13 laboratory strains (32 versus 21 cell divisions). As is the case for aging in mammals, there is a negative correlation between the logarithmic transformation of the initial mortality rate and the Gompertz coefficient for RLS. Thus this characteristic feature of aging is conserved from yeast to mammals. The average CLS of the natural isolates is about 7 days, significantly shorter than that of the laboratory strains. There is no correlation between RLS and CLS in natural isolates. Possible reasons for the differences between natural and laboratory strains are discussed.

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Citations

Jul 4, 2006·Genetics·James RonaldRachel B Brem
Apr 8, 2014·Proceedings of the National Academy of Sciences of the United States of America·Saisubramanian NagarajanFrank Rosenzweig
Mar 1, 2016·Journal of Applied Microbiology·R TofaloG Suzzi
Feb 15, 2017·Frontiers in Microbiology·Tejas BouklasBettina C Fries
Jun 2, 2017·Journal of Biosciences·Silvia Mercado-SaenzMiguel J Ruiz-Gomez
Mar 18, 2021·Briefings in Functional Genomics·Luc Legon, Charalampos Rallis

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