Cited by 9Yeasts and Rust Fungi StudiesFungal and yeast genetics researchEvolution and Genetic Dynamics

Performance, genomic rearrangements, and signatures of adaptive evolution: lessons from fermentative yeasts

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Nespolo, Roberto F., Solano‐Iguaran, Jaiber J., Paleo‐López, Rocío, Quintero‐Galvis, Julian F., Cubillos, Francisco A., Bozinovic, Francisco·2020·Ecology and Evolution

Abstract

and ethanol (=fermentation), even in the presence of oxygen, is known as the Crabtree effect. This phenomenon represents an important adaptation as it allowed the utilization of the ecological niche given by modern fruits, an abundant source of food that emerged in the terrestrial environment in the Cretaceous. However, identifying the evolutionary events that triggered fermentative capacity in Crabtree-positive species is challenging, as microorganisms do not leave fossil evidence. Thus, key innovations should be inferred based only on traits measured under culture conditions. Here, we reanalyzed data from a common garden experiment where several proxies of fermentative capacity were recorded in Crabtree-positive and Crabtree-negative species, representing yeast phylogenetic diversity. In particular, we applied the "lasso-OU" algorithm which detects points of adaptive shifts, using traits that are proxies of fermentative performance. We tested whether multiple events or a single event explains the actual fermentative capacity of yeasts. According to the lasso-OU procedure, evolutionary changes in the three proxies of fermentative capacity that we considered (i.e., glycerol production, ethanol yield, and respiratory quotient) are consistent with a single evolutionary episode (a whole-genomic duplication, WGD), instead of a series of small genomic rearrangements. Thus, the WGD appears as the key event behind the diversification of fermentative yeasts, which by increasing gene dosage, and maximized their capacity of energy extraction for exploiting the new ecological niche provided by single sugars.

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Authors
Nespolo, R. F., Solano‐Iguaran, J. J., Paleo‐López, R., Quintero‐Galvis, J. F., Cubillos, F. A., & Bozinovic, F.
Affiliations
  • Pontificia Universidad Católica de Chile (CL)
  • Austral University of Chile (CL)
  • Universidad de Santiago de Chile (CL)
Corresponding author
Nespolo, Roberto F.
Venue
Ecology and Evolution
Publisher
Wiley
Published
2020-06
Volume
10
Issue
12
Pages
5240-5250
ISSN
2045-7758 (ISSN-L)
OpenAlex
W3033311253
Cited by
9
References
58
Citations by year
2026: 2 · 2025: 2 · 2024: 1 · 2022: 1 · 2021: 1 · 2020: 2
FWCI
0.32
Type
journal article
Language
en
Open access
Locations
  • Ecology and Evolution (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Fondo Nacional de Desarrollo Científico y Tecnológico (1180917)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Yeasts and Rust Fungi Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Fungal and yeast genetics research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
Keywords
Crabtree effect, fermentative yeasts, whole-genome duplication, adaptive evolution, genome rearrangement, glycerol production, ethanol yield, respiratory quotient, common garden experiment, key innovations, gene dosage, Saccharomyces

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