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Effects of polyploidization during adaptive evolution in yeasts (PloidYeast)

Alternative title: Effekter av polyploidisering ved adaptiv evolusjon hos gjær (PloidYeast)

Awarded: NOK 11.4 mill.

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2021 - 2026

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Climate change, habitat destruction and other human activities are threating the sustainability of food security. UN has launched four aims within the sustainable development plan to maintain and ensure food security. In PloidYeast, we aim to apply a new collection of yeasts to offer new biotechnological approaches that will address the UN challenges and bring the food chain in a more sustainable direction, including more circular processes. To accomplish this objective, we will make use of a recurrent evolutionary phenomenon observed in several industrial yeasts and other organisms. This phenomenon is called polyploidization, which leads to an increase in the number of copies of the genome. Polyploidization facilitates the adaptation of the organism to new environmental conditions, such as the harsh conditions found in the food industry. Through several evolutionary steps, we aim to generate yeasts with desired industrial traits, accommodated to reach the sustainability of the food security. We will apply a multidisciplinary approach combining microbiology, molecular and genetic engineering methods, bioinformatics and mathematical modelling to select and generate a new yeast collection. At the end of the project, we expect to learn how polyploidization improves adaptation to industrial conditions, which will help to solve some of the UN challenges. Not so far, but we already know that by increasing the number of copies in the yeast genome through hybridization will combine traits from the parental yeasts and in this way introduce desired industrial traits.

Polyploidization is a recurrent evolutionary phenomenon that generates diversity and facilitates adaptation. The food production chain requires new industrial strains, more efficient or with innovative solutions to particular problems. Synthetic biology tools can introduce biological parts for improving industrial strains. However, some of those parts are still unknown. Industrially relevant yeasts are polyploids suggesting polyploidization as a mechanism to generate new industrial strains. Allopolyploids can combine multiple parental traits. But, the effects of polyploidization are not well understood. In PloidYeast, we will apply a multidisciplinary approach combining microbiology, molecular and genetic engineering methods, bioinformatics and mathematical modelling to generate a new generation of industrial strains with application in the food production chain and advance in our understanding of adaptation by polyploidization. First, we will ask whether polyploidization mechanism is a suitable mechanism to improve bioprocesses (Q1). We selected wild yeast species (WP1) to generate auto- and allopolyploids (WP2). We will test whether multi-species allopolyploids show multiple traits (Hypothesis: H1). Then, we will evolve the new polyploids on environments mimicking three industrial conditions (WP3) expecting adaptation to them (H2). After 500 generations of evolution, we will ask whether the effects of polyploidization are repeated (Q2) by sequencing the genomes, transcriptomes and quantifying their proteome, metabolome and other phenotypic traits (WP4). If Q2 is true, we will isolate genomic regions relevant to solve a biotechnological challenge (H3). We envision to use this new multiomic dataset to build the bases of a new generation of mathematical models applied to yeast polyploids to select wild strains (H4) and isolate biological parts contributing to solutions for sustainability of food systems and promotion of circular bioeconomy.

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Thematic Areas and Topics

MarinMarint naturmangfold, økosystemer og økosystemtjenesterNaturmangfold og miljøMarint naturmangfold, økosystemer og økosystemtjenesterMarinFNs BærekraftsmålFNs BærekraftsmålMål 12 Ansvarlig forbruk og produksjonInternasjonaliseringMiljøvennlig energiLTP2 Styrket konkurransekraft og innovasjonsevneLTP2 Nano-, bioteknologi og teknologikonvergensPortefølje LivsvitenskapMatMat - Blå sektorMatMat - BlågrønnBransjer og næringerEnergi - NæringsområdeBioøkonomiSektorovergripende bioøkonomiLTP2 Bioøkonomi og forvaltningLTP2 Klima, miljø og miljøvennlig energiBransjer og næringerLandbrukBioøkonomiBransjer og næringerNæringsmiddelindustriLTP2 HavBioteknologiPolitikk- og forvaltningsområderFiskeri og kystGrunnforskningLandbrukJordPortefølje HavBransjer og næringerFiskeri og havbrukPolitikk- og forvaltningsområderLTP2 Utvikle fagmiljøer av fremragende kvalitetPortefølje Muliggjørende teknologierLandbrukMatPortefølje Landbasert mat, miljø og bioressurserAnvendt forskningBioøkonomiØvrig bioøkonomiPolitikk- og forvaltningsområderEnergi - Politikk og forvaltningMiljøvennlig energiFornybar energi, bioInternasjonaliseringInternasjonalt prosjektsamarbeidPortefølje Industri og tjenestenæringerBioteknologiIndustriell bioteknologiPolitikk- og forvaltningsområderSkog, landbruk og matNaturmangfold og miljøLTP2 Et kunnskapsintensivt næringsliv i hele landetBioteknologiLandbruksbioteknologiMatMat - Grønn sektorLTP2 Marine bioressurser og havforvaltningPortefølje Energi, transport og lavutslippLTP2 Miljøvennlig energi og lavutslippsløsningerLTP2 Muliggjørende og industrielle teknologierLTP2 Fagmiljøer og talenterBransjer og næringer