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Convergence in domesticated fungi used for cheese and dry-cured meat maturation: beneficial traits, genomic mechanisms, and degeneration

Journal

CURRENT OPINION IN MICROBIOLOGY
Volume 70, Issue -, Pages -

Publisher

CURRENT BIOLOGY LTD
DOI: 10.1016/j.mib.2022.102236

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Funding

  1. ANR (French Agence Nationale de la Recherche) [ANR-19-CE20-0006-01]
  2. Louis D Foundation (Institut de France) award
  3. FUNGADAPT ANR [19-CE20-0002 A]

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This article reviews the phenomenon of phenotypic convergence during the domestication of fungi, focusing on several fungi involved in cheese making and dry-cured meat making. Adaptation to similar ecological niches led to convergence in aspects such as colony aspect, metabolism, and competitive ability.
Humans have domesticated genetically distant fungi for similar uses, the fermentation of lipid-rich and sugar-rich food to generate attractive aspects, odor and aroma, and to improve shelf life and product safety. Multiple independent domestication events also occurred within species. We review recent evidence of phenotypic convergence during the domestication of fungi for making cheese (Saccharomyces cerevisiae, Penicillium roqueforti, P. camemberti, and Geotrichum candidum) and for dry-cured meat making (P. nalgiovense and P. salamii). Convergence following adaptation to similar ecological niches involved colony aspect (fluffiness and color), lipolysis, proteolysis, volatile compound production, and competitive ability against food spoilers. We review evidence for convergence in genetic diversity loss in domesticated populations and in the degeneration of unused traits, such as toxin production and sexual reproduction. Phenotypic convergence sometimes occurred by similar mechanisms of genomic adaptation, in particular horizontal gene transfers and loss of genes.

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